Intelligent controller suitable for general low-voltage circuit breaker

Abstract

The utility model relates to an intelligent controller suitable for a general low-voltage circuit breaker, which comprises a signal acquisition module, a power supply module, a metering module, a master control module and a display / key module, and is characterized in that the signal acquisition module is respectively connected with the low-voltage circuit breaker, the power supply module, the master control module and the metering module; the power supply module is also respectively connected with the metering module, the main control module and the display / key module, and the metering module and the display / key module are respectively connected with the main control module. Compared with the prior art, on the basis of current protection (long time-delay protection, short time-delay protection and instantaneous protection), voltage protection (over-voltage protection, under-voltage protection, open-phase protection and zero-line breaking protection) functions can be realized, and a metering function, a communication function, a display function, a remote monitoring function, a networking function and the like can be realized; therefore, the intelligent and remote centralized management requirements of the power grid are met, and the system has the advantages of high universality, high reliability, economy and practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker controllers, in particular to an intelligent controller suitable for general low-voltage circuit breakers. Background Art

[0002] With the continuous improvement of the intelligence of the power grid, the demand for circuit breaker functions is also increasing. In order to promote the intelligent power supply and distribution system, the industry needs intelligent circuit breakers with more functions. For example, on the basis of the original current protection, voltage protection, metering function, communication function, display function, etc. need to be added. In addition, the intelligence of the power grid has become an important development direction today, requiring the circuit breakers in the power grid to be able to be networked for centralized management, real-time monitoring of the power grid operation status, and remote allocation of electric energy.

[0003] Existing circuit breakers are usually equipped with intelligent controllers. Existing intelligent controllers monitor the current in the circuit breaker's main circuit and drive the circuit breaker to cut off the circuit when a circuit fault occurs. That is, they have three-stage current protection (i.e., long-delay protection, short-delay protection, and instantaneous protection). However, they cannot realize voltage protection function, nor can they meet the needs of metering, on-site display, remote communication, and networking. Summary of the Invention

[0004] The purpose of this utility model is to overcome the defects of the above-mentioned prior art and to provide an intelligent controller suitable for universal low-voltage circuit breakers, which can realize voltage protection function on the basis of current protection, and realize metering function, communication function, display function, remote monitoring, networking and other functions.

[0005] The purpose of the utility model can be achieved through the following technical solutions: An intelligent controller suitable for a general low-voltage circuit breaker includes a signal acquisition module, a power module, a metering module, a main control module, and a display / button module. The signal acquisition module is respectively connected to the low-voltage circuit breaker, the power module, the main control module, and the metering module. The power module is also respectively connected to the metering module, the main control module, and the display / button module. The metering module and the display / button module are respectively connected to the main control module.

[0006] Furthermore, the signal acquisition module is provided with a voltage acquisition circuit, a metering current acquisition circuit and a protection current acquisition circuit. The input ends of the voltage acquisition circuit, the metering current acquisition circuit and the protection current acquisition circuit are respectively connected to the low-voltage circuit breaker, and the output ends of the voltage acquisition circuit and the metering current acquisition circuit are respectively connected to the metering module, and the output end of the protection current acquisition circuit is connected to the main control module.

[0007] Furthermore, the voltage collection circuit includes three voltage collection connecting wires UA, UB, UC, and a plug J1-2;

[0008] The protection current collection circuit includes six protection current collection connecting wires CTA1, CTA2, CTB1, CTB2, CTC1, CTC2, A current mutual inductor CTA, B current mutual inductor CTB, C current mutual inductor CTC, and plug J2-2;

[0009] The metering current acquisition circuit includes six metering current acquisition connecting wires CTAJ1, CTAJ2, CTBJ1, CTBJ2, CTCJ1, CTCJ2, A current mutual inductor CTAJ, B current mutual inductor CTBJ, C current mutual inductor CTCJ, and plug J3-2.

[0010] Furthermore, one end of the voltage collection connecting wire UA is connected to phase A on the incoming line side of the circuit breaker, and the other end is connected to pin 3 of plug J1-2. One end of the voltage collection connecting wire UB is connected to phase B on the incoming line side of the circuit breaker, and the other end is connected to pin 2 of plug J1-2. One end of the voltage collection connecting wire UC is connected to phase C on the incoming line side of the circuit breaker, and the other end is connected to pin 1 of plug J1-2. Plug J1-2 is connected to the power module.

[0011] One end of the protection current collection connecting wire CTA1 is connected to one pin of the A current mutual inductor CTA installed on the outgoing line side of the circuit breaker, and the other end is connected to the 6th pin of the plug J2-2. One end of the protection current collection connecting wire CTA2 is connected to the other pin of the A current mutual inductor CTA installed on the outgoing line side of the circuit breaker, and the other end is connected to the 5th pin of the plug J2-2. One end of the protection current collection connecting wire CTB is connected to one pin of the B current mutual inductor CTB installed on the outgoing line side of the circuit breaker, and the other end is connected to the 4th pin of the plug J2-2. One end of the connecting wire CTB2 is connected to the other pin of the B current transformer CTB installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 3 of the plug J2-2. One end of the protective current collection connecting wire CTC1 is connected to one pin of the C current transformer CTC installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 2 of the plug J2-2. One end of the protective current collection connecting wire CTC2 is connected to the other pin of the C current transformer CTC installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 1 of the plug J2-2. The plug J2-2 is connected to the main control module.

[0012] One end of the metering current collection connecting wire CTAJ1 is connected to one pin of the A current mutual inductor CTAJ installed on the outgoing line side of the circuit breaker, and the other end is connected to the 6th pin of the plug J3-2. One end of the metering current collection connecting wire CTAJ2 is connected to the other pin of the A current mutual inductor CTAJ installed on the outgoing line side of the circuit breaker, and the other end is connected to the 5th pin of the plug J3-2. One end of the metering current collection connecting wire CTBJ1 is connected to one pin of the B current mutual inductor CTBJ installed on the outgoing line side of the circuit breaker, and the other end is connected to the 4th pin of the plug J3-2. One end of the connecting wire CTBJ2 is connected to the other pin of the B current transformer CTBJ installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 3 of the plug J3-2. One end of the metering current collection connecting wire CTCJ1 is connected to one pin of the C current transformer CTCJ installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 2 of the plug J3-2. One end of the metering current collection connecting wire CTCJ2 is connected to the other pin of the C current transformer CTCJ installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 1 of the plug J3-2. The plug J3-2 is connected to the metering module.

[0013] Furthermore, the power module includes a surge protection circuit, a 12V switching voltage regulator circuit, a 5V voltage regulator circuit, a lithium battery automatic charging circuit, an automatic switching circuit, a 5V boost voltage regulator circuit, a 3.3V voltage regulator circuit, a power supply side ground terminal, a system side common terminal and a first connector unit, and the first connector unit includes sockets J1-1, J4-1, and J5-1;

[0014] The surge protection circuit includes varistors RV1, RV2, and RV3;

[0015] The 12V switching voltage stabilizing circuit includes resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, capacitors C1, C2, C3, C4, C5, C6, C7, C8, C9, C69, a rectifier bridge B1, diodes D1, D2, D4, D5, D6, a transformer T1, an integrated circuit IC1, and a CMOS tube Q1;

[0016] The 5V voltage stabilizing circuit includes a diode D13, capacitors C72, C10, C11, C12, and an integrated circuit IC2;

[0017] The lithium battery automatic charging circuit includes a resistor R16, a capacitor C13, an integrated circuit IC3, and a socket J7-1;

[0018] The automatic switching circuit includes a resistor R17, capacitors C14 and C15, a diode D7, and a CMOS tube Q2;

[0019] The 5V boost voltage stabilization circuit includes resistors R19, R20, capacitors C16, C17, inductor L2, diode D8, CMOS tube Q3, and integrated circuit IC4;

[0020] The 3.3V voltage stabilizing circuit includes resistors R21, R22, R23, capacitors C18, C19, C20, C21, inductor L3, and integrated circuit IC5;

[0021] The power supply side ground terminal GND and the system side common terminal COM are connected via a capacitor C71.

[0022] Furthermore, the socket J1-1 is connected to the signal acquisition module, the socket J4-1 is connected to the metering module, the socket J5-1 is connected to the main control module, the socket J7-1 is connected to the lithium battery, and the pin 1 of J4-1 is connected to the pin 5 of J5-1;

[0023] In the surge protection circuit, one pin of the varistor RV1 is connected to pin 3 of the socket J1-1, pin 4 of the socket J4-1, and one pin of the resistor R1; the other pin of the varistor RV1 is connected to pin 1 of the socket J4-1 and pin 2 of the rectifier bridge B1; one pin of the varistor RV2 is connected to pin 2 of the socket J1-1 and pin 3 of the socket J4-1; the other pin of the varistor RV2 is connected to pin 1 of the socket J4-1; one pin of the varistor RV3 is connected to pin 1 of the socket J1-1 and pin 2 of the socket J4-1; and the other pin of the varistor RV3 is connected to pin 1 of the socket J4-1;

[0024] In the 12V switching voltage regulator circuit, one foot of the resistor R1 is connected to one foot of the varistor RV1 and pin 3 of the socket J1-1, the other foot of the resistor R1 is connected to pin 1 of the rectifier bridge B1, pin 2 of the rectifier bridge B1 is connected to pin 1 of the socket J4-1 and pin 5 of the socket J5-1, pin 3 of the rectifier bridge B1 is connected to the ground terminal GND on the power supply side, the positive electrode of the starting capacitor C1 is connected to pin 4 of the rectifier bridge B1, and the negative electrode is connected to the ground terminal GND on the power supply side. After the resistors R2, R3, and R4 are connected in series, the other foot of the resistor R2 is connected to pin 4 of the rectifier bridge B1 and the positive electrode of the capacitor C1, and the other foot of the resistor R4 is connected to pin 7 of the integrated circuit IC1 to provide an initial starting voltage for the integrated circuit IC1. Pin 1 of the transformer T1 is connected to the rectifier Pin 4 of bridge B1 is connected, and after resistor R5 and capacitor C2 are connected in parallel, one end is connected to pin 1 of transformer T1, and the other end is connected to the negative electrode of diode D1. The positive electrode of diode D1 is connected to pin 2 of transformer T1. Resistor R5, capacitor C2, and diode D1 form a discharge circuit. Capacitor C3 and capacitor C4 are connected in parallel. One end of the positive electrode of capacitor C4 is connected to pin 7 of integrated circuit IC1 and the negative electrode of diode D2, and the other end is connected to the ground terminal GND on the power supply side. The positive electrode of diode D2 is connected to one pin of resistor R6, and the other pin of resistor R6 is connected to pin 5 of transformer T1. Pin 6 of transformer T1 is connected to the ground terminal GND on the power supply side. Capacitor C3, capacitor C4, diode D2, resistor R6, and transformer T1 are integrated circuit IC1. Providing working voltage, after resistors R7 and R8 are connected in series, the other leg of resistor R7 is connected to pin 7 of integrated circuit IC1, and the other leg of resistor R8 is connected to the ground terminal GND on the power supply side. After resistor R9 and capacitor C6 are connected in parallel, one end is connected to pin 1 of integrated circuit IC1, and the other end is connected to pin 2 of integrated circuit IC1, resistor R7, and resistor R8, which plays the role of regulating voltage. Pin 3 of integrated circuit IC1 is connected to capacitor C8 and one leg of resistor R11, and the other leg of capacitor C8 is connected to the ground terminal GND on the power supply side. The other leg of resistor R11 is connected to the source of CMOS tube Q1 and one leg of resistor R12, and the other leg of resistor R12 is connected to the ground terminal GND on the power supply side. Resistors R11, R12, and capacitor C8 forms a current detection network. Pin 4 of the integrated circuit IC1 is connected to the resistor R10 and one pin of the capacitor C7. The other pin of the capacitor C7 is connected to the power supply side ground terminal GND. The other pin of the resistor R10 is connected to the pin 8 of the integrated circuit IC1. The resistor R10 and the capacitor C7 adjust the oscillation frequency and maximum duty cycle of the integrated circuit IC1. Pin 5 of the integrated circuit IC1 is connected to the power supply side ground terminal GND. Pin 6 of the integrated circuit IC1 is connected to the cathode of the diode D4 and one pin of the resistor R13. The anode of the diode D4 is connected to the power supply side ground terminal GND. The other pin of the resistor R13 is connected to the gate of the CMOS tube Q1 and one pin of the resistor R14. The other pin of the resistor R14 is connected to the power supply side ground terminal GND.The drain of CMOS tube Q1 is connected to pin 2 of transformer T1 and one pin of capacitor C69. The other pin of capacitor C69 is connected to the anode of diode D5 and one pin of resistor R15. The cathode of diode D5 and the other pin of resistor R15 are connected to the power supply side ground terminal GND. Capacitor C69, diode D5, and resistor R15 protect CMOS tube Q1. The anode of diode D6 is connected to pin 3 of transformer T1. The cathode of diode D6 is connected to the anode of capacitor C9 and pin 4 of socket J5-1, providing 12VDC power to the system. The other pin of capacitor C9 and pin 4 of transformer T1 are connected to the system side common terminal COM.

[0025] In the 5V voltage stabilizing circuit, the anode of diode D13 is connected to the cathode of diode D6 and pin 4 of socket J5-1, and the cathode of diode D13 is connected to pins 1 and 3 of integrated circuit IC2. Diode D13 plays a protective role. When the polarity of the external auxiliary power supply 12VDC is reversed, diode D13 is cut off and cannot provide power to the control. After capacitors C72 and C10 are connected in parallel, the positive terminal of capacitor C72 is connected to pins 1 and 3 of integrated circuit IC2, the negative terminal of capacitor C72 is connected to the system-side common terminal COM, pin 2 of integrated circuit IC2 is connected to the system-side common terminal COM, one pin of capacitor C11 is connected to pin 4 of integrated circuit IC2, and the other pin is connected to pin 5 of integrated circuit IC2, pin 5 of integrated circuit IC2 is connected to the positive electrode of capacitor C12, and the other pin of capacitor C12 is connected to the system-side common terminal COM;

[0026] In the lithium battery automatic charging circuit, pins 1 and 2 of the integrated circuit IC3 are connected to the system-side common terminal COM, pin 5 of the integrated circuit IC3 is connected to the system-side common terminal COM through a resistor R16, pin 4 of the integrated circuit IC3 is connected to pin 5 of the integrated circuit IC2, pin 3 of the integrated circuit IC3 is connected to one pin of the capacitor C13, pin 2 of the socket J7-1, and the drain of the CMOS tube Q2, the other pin of the capacitor C13, pin 1 of the socket J7-1 are connected to the system-side common terminal COM, pin 2 of the socket J7-1 is connected to the positive electrode of the lithium battery, and pin 1 of the socket J7-1 is connected to the negative electrode of the lithium battery;

[0027] In the automatic switching circuit, the gate of the CMOS tube Q2 is connected to pin 5 of the integrated circuit IC2, one pin of the resistor R17, and the positive electrode of the diode D7. The other pin of the resistor R17 is connected to the system-side common terminal COM. The drain of the CMOS tube Q2 is connected to pin 3 of the integrated circuit IC3. The source of the CMOS tube Q2 is connected to the negative electrode of the diode D7, the positive electrode of the capacitor C14, and one pin of the capacitor C15. The negative electrode of the capacitor C14 and the other pin of the capacitor C15 are connected to the system-side common terminal COM. When the system is powered, the CMOS tube Q2 is turned off. When the system cannot be powered, the CMOS tube Q2 is turned on and powered by the lithium battery, ensuring that the control can work normally during a power outage.

[0028] In the 5V boost voltage stabilization circuit, one pin of the inductor L2 is connected to the source of the CMOS transistor Q2, the other pin of the inductor L2 is connected to the anode of the diode D8 and the drain of the CMOS transistor Q3, the gate of the CMOS transistor Q3 is connected to pin 5 of the integrated circuit IC4, the cathode of the diode D8 is connected to one pin of the resistor R19, the anode of the capacitor C16, one pin of the capacitor C17, and pin 3 of the socket J5-1, providing a 5VDC power supply, the other pin of the resistor R19 is connected to pin 5 of the integrated circuit IC4, one pin of the resistor R20, the other pin of the resistor R20, the cathode of the capacitor C16, the other pin of the capacitor C17, and pin 4 of the integrated circuit IC4 are connected to the system-side common terminal COM, and pins 2 and 3 of the integrated circuit IC4 are connected to the source of the CMOS transistor Q2. When powered by the system, a stable 5V power supply is maintained. When powered by a lithium battery, this circuit boosts the lithium battery voltage to 5V while still maintaining a stable 5V power supply.

[0029] In the 3.3V voltage regulator circuit, pins 1 and 4 of the integrated circuit IC5 are connected to the cathode of the diode D8 and one pin of the capacitor C18; the other pin of the capacitor C18 and pin 2 of the integrated circuit IC5 are connected to the system-side common terminal COM; pin 3 of the integrated circuit IC5 is connected to one pin of the inductor L3; the other pin of the inductor L3 is connected to one pin of the resistor R21, one pin of the capacitor C19, the positive electrode of the capacitor C20, one pin of the capacitor C21, one pin of the resistor R23, and pin 2 of the socket J5-1 to provide a 3.3VDC power supply; the other pin of the resistor R21 is connected to the other pin of the capacitor C19, one pin of the resistor R22, and pin 5 of the integrated circuit IC5; the other pin of the resistor R22, the negative electrode of the capacitor C20, the other pin of the capacitor C21, and the other pin of the resistor R23 are connected to the system-side common terminal COM;

[0030] Pins 4, 3, and 2 of the socket J4-1 are connected to pins 3, 2, and 1 of the socket J1-1, respectively, and pin 1 of J4-1 is connected to pin 5 of J5-1.

[0031] Pin 5 of the socket J5-1 is connected to the main control module, pin 4 of J5-1 is connected to the cathode of diode D6 to provide 12VDC power supply, pin 3 of J5-1 is connected to the cathode of diode D8 to provide 5VDC power supply, pin 2 of J5-1 is connected to one pin of inductor L3 to provide 3.3VDC power supply, and pin 1 of J5-1 is connected to the common terminal COM on the system side.

[0032] Furthermore, the main control module includes a second connector unit, an A-phase processing unit, a B-phase processing unit, a C-phase processing unit, a trip control circuit, an operation status indication circuit, a communication interface circuit, a level conversion circuit, an opening and closing status detection circuit, a clock circuit and a microprocessor control circuit;

[0033] The second connector unit includes sockets J2-1, J6-1, J8-1, J9-1, J10-1, J11-1, J12-1, J13-1, J14-1, J15-1 and a plug J5-2;

[0034] The A-phase processing unit includes a rectifier bridge B2, resistors R60, R63, R66, R69, R72, capacitors C34, C37, C38, and an amplifier IC9-A, which are used to realize A-phase current rectification, current-voltage conversion, filtering, and amplification processing;

[0035] The B-phase processing unit includes a rectifier bridge B3, resistors R61, R64, R67, R70, R73, capacitors C35, C39, and an amplifier IC9-B, which are used to realize B-phase current rectification, current-voltage conversion, filtering, and amplification processing;

[0036] The C-phase processing unit includes a rectifier bridge B4, resistors R62, R65, R68, R71, R74, capacitors C36, C40, and an amplifier IC9-C, which are used to realize C-phase current rectification, current-voltage conversion, filtering, and amplification processing;

[0037] The trip control circuit includes isolation diodes D9, D10, D12, a freewheeling diode D11, capacitors C65, C66, C67, resistors R100, R101, and a transistor Q4;

[0038] The operating status indication circuit includes current limiting resistors R88, R87, R86, a green LED1, a red LED2, and a yellow LED3;

[0039] The communication interface circuit includes pull-up resistors R79, R80, R81, resistors R77, R78, a transceiver chip IC7, and a capacitor C47;

[0040] The level conversion circuit includes a resistor R106, capacitors C77, C78, and IC11;

[0041] The opening and closing state detection circuit includes pull-up resistors R85 and J8-1;

[0042] The clock circuit includes pull-up resistors R82, R83, R84, capacitors C48, C49, a crystal oscillator XT3, and IC8;

[0043] The microprocessor control circuit includes pull-up resistors R75, R76, R102, R103, R104, R105, R89, R90, R91, R92, R108, capacitors C41, C42, C43, C44, C45, C46, C73, C74, a crystal oscillator XT1, an inductor L1, and a chip IC6.

[0044] Furthermore, in the second connector unit, the socket J2-1 is connected to the plug J2-2 of the signal acquisition module, the plug J5-2 is connected to the socket J5-1 of the power module, the socket J6-1 is connected to the plug J6-2 of the trip actuator installed on the circuit breaker, the socket J8-1 is connected to the auxiliary normally open contact installed on the circuit breaker, and is used to determine the closing and opening status of the circuit breaker, the sockets J9-1 and J10-1 are respectively connected to the metering module, the sockets J11-1 and J12-1 are respectively connected to the display / button module, the socket J13-1 is the program download interface, the socket J14-1 is the user terminal interface, and the socket J15-1 is the handheld programmer interface;

[0045] In the A-phase processing unit, pin 1 of the rectifier bridge B2 is connected to pin 6 of the socket J2-1, pin 2 of the rectifier bridge B2 is connected to pin 5 of the socket J2-1, one pin of the resistors R60 and R63 is connected to pin 4 of the rectifier bridge B2, the other pin of the resistor R60 and pin 3 of the rectifier bridge B2 are connected to the common terminal COM, the other pin of the resistor R63 is connected to the resistor R66 and one pin of the capacitor C34, the other pin of the capacitor C34 and one pin of the resistor R69 are connected to the common terminal COM, the other pin of the resistor R66 and one pin of the resistor R72 are connected to pin 2 of the amplifier IC9-A, the other pin of the resistor R69 is connected to pin 3 of the amplifier IC9-A, the other pin of the resistor R72 is connected to pin 1 of the amplifier IC9-A, one pin of the capacitor C38, and pin 37 of the chip IC6, the other pin of the capacitor C38 and one pin of the capacitor C37 are connected to the common terminal COM, and the other pin of the capacitor C37 is connected to pin 4 of the amplifier IC9-A and pin 3 of the plug J5-2;

[0046] In the B-phase processing unit, pin 1 of the rectifier bridge B3 is connected to pin 4 of the socket J2-1, pin 2 of B3 is connected to pin 3 of the socket J2-1, resistor R61 and one pin of the resistor R64 are connected to pin 4 of the rectifier bridge B3, the other pin of the resistor R61 and pin 3 of the rectifier bridge B3 are connected to the common terminal COM, the other pin of the resistor R64 is connected to resistor R67 and one pin of the capacitor C35, the other pin of the capacitor C35 and one pin of the resistor R70 are connected to the common terminal COM, the other pin of the resistor R67 and one pin of the resistor R73 are connected to pin 5 of the amplifier IC9-B, the other pin of the resistor R70 is connected to pin 6 of the amplifier IC9-B, the other pin of the resistor R73 is connected to pin 7 of the amplifier IC9-B, one pin of the capacitor C39, and pin 36 of the chip IC6, and the other pin of the capacitor C39 is connected to the common terminal COM;

[0047] In the capacitor C phase processing unit, pin 1 of the rectifier bridge B4 is connected to pin 2 of the socket J2-1, pin 2 of B4 is connected to pin 1 of the socket J2-1, resistor R62 and one pin of resistor R65 are connected to pin 4 of the rectifier bridge B4, the other pin of the resistor R62 and pin 3 of B4 are connected to the common terminal COM, the other pin of the resistor R65 is connected to resistor R68 and one pin of capacitor C36, the other pin of capacitor C36 and one pin of resistor R71 are connected to the common terminal COM, the other pin of resistor R68 and one pin of resistor R74 are connected to pin 9 of amplifier IC9-C, the other pin of resistor R71 is connected to pin 10 of amplifier IC9-C, the other pin of resistor R74 is connected to pin 8 of amplifier IC9-C, one pin of capacitor C40, and pin 35 of chip IC6, and the other pin of capacitor C40 is connected to the common terminal COM;

[0048] In the trip control circuit, the positive electrode of capacitor C65, one pin of capacitor C66, and the positive electrode of D9 are connected to pin 4 of J5-2, the negative electrode of capacitor C65 and the other pin of capacitor C66 are connected to the common terminal COM, the negative electrode of D9 is connected to the negative electrode of D10, pin 2 of J6-1, and the negative electrode of D12, the positive electrode of D10 is connected to the negative electrode of D12, resistor R100, resistor R101, and pin 5 of J14-1, the positive electrode of D12 is connected to pin 11 of chip IC6, the other pin of resistor R100 is connected to the common terminal COM, the other pin of resistor R101 is connected to the base of transistor Q4 and one pin of capacitor C67, the other pin of capacitor C67 and the emitter of Q4 are connected to the common terminal COM, the collector of Q4 is connected to the positive electrode of D11 and pin 1 of socket J6-1, and socket J6-1 is connected to the trip actuator plug J6-2 installed on the circuit breaker;

[0049] In the operating status indication circuit, one pin of the resistor R86, the resistor R87, and the resistor R88 is connected to the 3rd pin of the plug J5-2, and the other pins of the resistor R86, the resistor R87, and the resistor R88 are connected to the positive electrodes of LED1, LED2, and LED3 respectively, and the negative electrodes of LED1, LED2, and LED3 are connected to the 26th pin, the 25th pin, and the 24th pin of the chip IC6 respectively;

[0050] In the communication interface circuit, pins 1, 4, 2, and 3 of the transceiver chip IC7 are respectively connected to the resistor R80, the resistor R79, one pin of the resistor R81, and the pins 9, 10, and 40 of the chip IC6, the resistors R79, R80, and R81 are connected to pin 3 of the plug J5-2, the pin 5 of the transceiver chip IC7 is connected to the common terminal COM, the pins 6 and 7 of the transceiver chip IC7 are respectively connected to one pin of the resistor R78 and the resistor R77, the other pins of the resistor R78 and the resistor R77 are respectively connected to pins 3 and 4 of the socket J14-1, the pin 8 of the transceiver chip IC7 is connected to pin 3 of the plug J5-2 and one pin of the capacitor C47, and the other pin of the capacitor C47 is connected to the common terminal COM;

[0051] In the level conversion circuit, pin 2 of the chip IC11 is connected to one pin of the capacitor C77 and pin 2 of the plug J5-2, the other pin of the capacitor C77 is connected to the common terminal COM, pin 19 of the chip IC11 is connected to one pin of the capacitor C78 and pin 3 of the plug J5-2, the other pin of the capacitor C78 is connected to the common terminal COM, pin 10 of the chip IC11 is connected to one pin of the resistor R106, the other pin of the resistor R106 is connected to pin 2 of the plug J5-2, and pin 11 of the chip IC11 is connected to the common terminal COM. Pins 1, 3, 4, and 5 of IC11 are connected to pins 4, 2, 1, and 3 of socket J10-1 respectively. Pins 6 and 7 of chip IC11 are connected to pins 5 and 4 of socket J9-1 respectively. Pins 8 and 9 of chip IC11 are connected to pins 4 and 3 of socket J11-1 respectively. Pins 12, 13, 14, 15, 16, 17, 18, and 20 of chip IC11 are connected to pins 20, 19, 42, 41, 3, 2, 1, and 43 of chip IC6 respectively.

[0052] In the opening and closing state detection circuit, one pin of the resistor R85 is connected to the 3rd pin of the plug J5-2, the other pin of the resistor R85 is connected to the 23rd pin of the chip IC6 and the 2nd pin of the socket J8-1, the 1st pin of the socket J8-1 is connected to the common terminal COM, and the socket J8-1 is connected to the auxiliary normally open contact installed on the circuit breaker, which is used to determine the closing and opening state of the circuit breaker;

[0053] In the clock circuit, pins 1 and 8 of chip IC8 are connected to pin 3 of plug J5-2, pin 2 of chip IC8 is connected to one pin of crystal oscillator XT3 and one pin of capacitor C49, the other pin of capacitor C49 is connected to the common terminal COM, pin 3 of chip IC8 is connected to the other pin of crystal oscillator XT3 and one pin of capacitor C48, the other pin of capacitor C48 is connected to the common terminal COM, pin 4 of chip IC8 is connected to the common terminal COM, pin 5 of chip IC8 is connected to pin 22 of chip IC6 and one pin of resistor R84 to control the read and write operations of chip IC8, pins 6 and 7 of chip IC8 are connected to resistor R83, resistor R82, and pin 1 and pin 3 of chip IC6, respectively, and the other pins of resistors R82, resistor R83, and resistor R84 are connected to pin 3 of plug J5-2;

[0054] In the microprocessor control circuit, one pin of the resistor R75 is connected to the 3rd pin of the plug J5-2, the other pin of the resistor R75 is connected to the positive electrode of the capacitor C41 and the 4th pin of the transceiver chip IC7, the negative electrode of the capacitor C41 is connected to the common terminal COM, and one pin of the resistor R76, the resistor R102, the resistor R103, the resistor R104, the resistor R105, the resistor R89, the resistor R90, the resistor R91, the resistor R92, and the resistor R108 is connected to the 3rd pin of the plug J5-2, and the resistor R76, the resistor R102, the resistor R103, the resistor R104, the resistor R105, the resistor R89, the resistor R90, and the resistor R91 , resistor R92, and one foot of resistor R108 are connected to pins 44, 43, 2, 19, 20, 12, 13, 14, 15, and 16 of chip IC6 respectively. Pin 7 of chip IC6 is connected to one foot of crystal oscillator XT1 and one foot of capacitor C46. The other foot of capacitor C46 is connected to the common terminal COM. Pin 8 of chip IC6 is connected to the other foot of crystal oscillator XT1 and one foot of capacitor C45. The other foot of capacitor C45 is connected to the common terminal COM. Pin 27 of chip IC6 is connected to one foot of inductor L1, one foot of capacitor C44, and pin 29 of chip IC6. The other foot of L1 One pin is connected to pin 3 of J5-2, the other pin of capacitor C44 is connected to the common terminal COM, pins 5, 17, and 38 of chip IC6 are connected to pin 3 of plug J5-2, pins 6, 18, and 39 of chip IC6 are connected to the common terminal COM, pin 16 of chip IC6 is connected to pin 3 of socket J9-1, pins 12, 13, 14, and 15 of chip IC6 are connected to pins 4, 3, 2, and 1 of socket J12-1 respectively, after capacitors C43, C42, C73, and C74 are connected in parallel, the positive end of capacitor C43 is connected to pin 3 of plug J5-2, and the negative end is connected to the common terminal CO M connection, pin 2 of plug J5-2 is connected to pin 2 of socket J9-1 and pin 2 of socket J11-1, pin 5 of plug J5-2 is connected to pin 6 of socket J14-1, pin 6, pin 5, pin 4 and pin 3 of socket J13-1 are connected to pin 3, pin 2, pin 1 and pin 4 of chip IC6 respectively, pin 2 and pin 1 of socket J13-1 are connected to pin 3 and pin 1 of plug J5-2 respectively, pin 5, pin 4 and pin 3 of socket J15-1 are connected to pin 40, pin 9 and pin 10 of chip IC6 respectively, pin 2 and pin 1 of socket J15-1 are connected to pin 3 and pin 1 of plug J5-2 respectively, and all common terminals are connected COM.

[0055] Furthermore, the metering module includes a third connector unit, a metering current signal processing unit, a metering voltage signal processing unit and a metering processing circuit, and the third connector unit includes a socket J3-1 and plugs J4-2, J9-2 and J10-2;

[0056] The metering current signal processing unit includes an A-phase current-voltage conversion circuit, a B-phase current-voltage conversion circuit, and a C-phase current-voltage conversion circuit. The A-phase current-voltage conversion circuit includes a resistor R24, a resistor R25, a resistor R30, a resistor R31, a capacitor C22, and a capacitor C23. The B-phase current-voltage conversion circuit includes a resistor R26, a resistor R27, a resistor R32, a resistor R33, a capacitor C24, and a capacitor C25. The C-phase current-voltage conversion circuit includes a resistor R28, a resistor R29, a resistor R34, a resistor R35, a capacitor C26, and a capacitor C27.

[0057] The metering voltage signal processing unit includes a phase A voltage sampling circuit, a phase B voltage sampling circuit, and a phase C voltage sampling circuit. The phase A voltage sampling circuit includes resistors R36, R37, R38, R39, R40, R41, R54, R55, R110, R111, a transformer T2, a capacitor C28, and a capacitor C29.

[0058] The B-phase voltage sampling circuit includes a resistor R42, a resistor R43, a resistor R44, a resistor R45, a resistor R46, a resistor R47, a resistor R56, a resistor R57, a resistor R112, a resistor R113, a transformer T3, a capacitor C30, and a capacitor C31;

[0059] The C-phase voltage sampling circuit includes a resistor R48, a resistor R49, a resistor R50, a resistor R51, a resistor R52, a resistor R53, a resistor R58, a resistor R59, a resistor R114, a resistor R115, a transformer T4, a capacitor C32, and a capacitor C33;

[0060] The measurement processing circuit includes a chip IC10, a resistor R93, a resistor R94, a resistor R95, a resistor R96, a resistor R97, a resistor R98, a resistor R109, a capacitor C50, a capacitor C51, a capacitor C52, a capacitor C53, a capacitor C54, a capacitor C55, a capacitor C56, a capacitor C57, a capacitor C58, a capacitor C59, a capacitor C60, a capacitor C61, a capacitor C62, a capacitor C63, a capacitor C64, a capacitor C70, and a CMOS tube Q5;

[0061] In the third connector unit, the socket J3-1 is connected to the plug J3-2 of the signal acquisition module, the plug J4-2 is connected to the socket J4-1 of the power module, the plug J9-2 is connected to the socket J9-1 of the main control module, and the plug J10-2 is connected to the socket J10-1 of the main control module;

[0062] In the A-phase current-voltage conversion circuit, one pin of the resistor R24 and the resistor R30 is connected to pin 6 of the socket J3-1, one pin of the resistor R25 and the resistor R31 is connected to pin 5 of the socket J3-1, the other pins of the resistor R24 and the resistor R25 are connected to one pin of the capacitor C22 and the capacitor C23, and are connected to the common terminal capacitor COM, the other pin of the resistor R30 and the other pin of the capacitor C22 are connected to pin 3 of the chip IC10, and the other pin of the resistor R31 and the other pin of the capacitor C23 are connected to pin 4 of the chip IC10, converting the current signal into a voltage signal and then providing it to the chip IC10;

[0063] In the B-phase current-voltage conversion circuit, one pin of the resistor R26 and the resistor R32 is connected to pin 4 of the socket J3-1, one pin of the resistor R27 and the resistor R33 is connected to pin 3 of the socket J3-1, the other pins of the resistor R26 and the resistor R27 are connected to one pin of the capacitor C24 and the capacitor C25, and are connected to the common terminal capacitor COM, the other pin of the resistor R32 and the other pin of the capacitor C24 are connected to pin 6 of the chip IC10, and the other pin of the resistor R33 and the other pin of the capacitor C25 are connected to pin 7 of the chip IC10, so as to convert the current signal into a voltage signal and then provide it to the chip IC10;

[0064] In the C-phase current-voltage conversion circuit, one pin of the resistor R28 and the resistor R34 is connected to pin 2 of the socket J3-1, one pin of the resistor R29 and the resistor R35 is connected to pin 1 of the socket J3-1, the other pins of the resistor R28 and the resistor R29 are connected to one pin of the capacitor C26 and the capacitor C27, and are connected to the common terminal capacitor COM, the other pin of the resistor R34 and the other pin of the capacitor C26 are connected to pin 9 of the chip IC10, and the other pin of the resistor R35 and the other pin of the capacitor C27 are connected to pin 10 of the chip IC10, converting the current signal into a voltage signal and then providing it to the chip IC10;

[0065] In the A-phase voltage sampling circuit, after resistors R36, R37, and R38 are connected in series, the other leg of resistor R36 is connected to pin 4 of plug J4-2, and the other leg of resistor R38 is connected to pin 1 of transformer T2. After resistors R39, R40, and R41 are connected in series, the other leg of resistor R39 is connected to pin 1 of plug J4-2, and the other leg of resistor R41 is connected to pin 2 of transformer T2, converting high voltage into low current signal. Transformer T2 is a 1:1 current transformer. Resistors R54 and R1 One pin of 10 is connected to pin 3 of transformer T2, one pin of resistor R55 and resistor R111 is connected to pin 4 of transformer T2, the other pins of resistor R54 and resistor R55 are connected to one pin of capacitor C28 and capacitor C29, and connected to the common terminal capacitor COM, the other pin of resistor R110 and the other pin of capacitor C28 are connected to pin 13 of chip IC10, the other pin of resistor R111 and the other pin of capacitor C29 are connected to pin 14 of chip IC10, and the current signal is converted into a voltage signal and then given to chip IC10;

[0066] In the B-phase voltage sampling circuit, after the resistors R42, R43, and R44 are connected in series, the other pin of the resistor R42 is connected to the 3rd pin of the plug J4-2, and the other pin of the resistor R44 is connected to the 1st pin of the transformer T3. After the resistors R45, R46, and R47 are connected in series, the other pin of the resistor R45 is connected to the 1st pin of the plug J4-2, and the other pin of the resistor R47 is connected to the 2nd pin of the transformer T3, converting the high voltage into a small current signal. The transformer T3 is a 1:1 current transformer. The resistors R56 and R1 One pin of 12 is connected to pin 3 of transformer T3, one pin of resistor R57 and resistor R113 is connected to pin 4 of transformer T3, the other pins of resistor R56 and resistor R57 are connected to one pin of capacitor C30 and capacitor C31, and connected to the common terminal capacitor COM, the other pin of resistor R112 and the other pin of capacitor C30 are connected to pin 16 of chip IC10, the other pin of resistor R113 and the other pin of capacitor C31 are connected to pin 17 of chip IC10, and the current signal is converted into a voltage signal and then given to chip IC10;

[0067] In the C-phase voltage sampling circuit, after the resistors R48, R49, and R50 are connected in series, the other pin of the resistor R48 is connected to the 2nd pin of the plug J4-2, and the other pin of the resistor R50 is connected to the 1st pin of the transformer T4. After the resistors R51, R52, and R53 are connected in series, the other pin of the resistor R51 is connected to the 1st pin of the plug J4-2, and the other pin of the resistor R53 is connected to the 2nd pin of the transformer T4, converting the high voltage into a small current signal. The transformer T4 is a 1:1 current transformer. The resistors R58 and R1 One pin of 14 is connected to pin 3 of transformer T4, one pin of resistor R59 and resistor R115 is connected to pin 4 of transformer T4, the other pins of resistor R58 and resistor R59 are connected to one pin of capacitor C32 and capacitor C33, and connected to the common terminal capacitor COM, the other pin of resistor R114 and the other pin of capacitor C32 are connected to pin 19 of chip IC10, the other pin of resistor R115 and the other pin of capacitor C33 are connected to pin 20 of chip IC10, and the current signal is converted into a voltage signal and then given to chip IC10;

[0068] In the metering processing circuit, pins 3, 4, 6, 7, 9, 10, 13, 14, 16, 17, 19, and 20 of the chip IC10 are connected to resistors R30, R31, R32, R33, R34, R35, R110, R111, R112, R113, R114, and R115, respectively; pins 8, 11, 15, 23, 24, 32, 33, and 44 of the chip IC10 are connected to the common capacitor COM; pins 12, 18, 34, and 41 of the chip IC10 are connected to pin 2 of the plug J9-2; and pins 11 and 12 of the chip IC10 are connected in parallel. Capacitor C54, capacitor C55, capacitor C62, capacitor C63, capacitor C64 are connected in parallel between pins 33 and 34 of chip IC10, capacitor C50 and capacitor C51 are connected in parallel between pin 39 of chip IC10 and common capacitor COM, and the positive electrode of capacitor C50 is connected to pin 39 of chip IC10, capacitor C52 and capacitor C53 are connected in parallel between pin 5 of chip IC10 and common capacitor COM, and the positive electrode of capacitor C52 is connected to pin 5 of chip IC10, pin 1 of chip IC10 is connected to one pin of resistor R97, the positive electrode of capacitor C70, and pin 5 of plug J9-2, the other pin of resistor R97 is connected to pin 2 of plug J9-2, the negative electrode of capacitor C70 is connected to the common capacitor COM, and the pin of chip IC10 is connected to the positive electrode of capacitor C70. Pin 2 is connected to pin 4 of plug J9-2, pin 42 of chip IC10 is connected to one pin of crystal oscillator XT2 and one pin of capacitor C57, the other pin of capacitor C57 is connected to the common terminal capacitor COM, pin 43 of chip IC10 is connected to one pin of crystal oscillator XT2 and one pin of capacitor C56, the other pin of capacitor C56 is connected to the common terminal capacitor COM, pin 35 of chip IC10 is connected to one pin of resistor R93 and one pin of capacitor C61, the other pin of capacitor C61 is connected to the common terminal capacitor COM, the other pin of resistor R93 is connected to pin 4 of plug J10-2, pin 36 of chip IC10 is connected to one pin of resistor R94 and one pin of capacitor C60, the other pin of capacitor C60 is connected to the common terminal capacitor The other leg of resistor R94 is connected to pin 3 of plug J10-2. Pin 37 of chip IC10 is connected to one leg of resistor R95 and one leg of capacitor C59. The other leg of capacitor C59 is connected to the common capacitor COM. The other leg of resistor R95 is connected to pin 2 of plug J10-2. Pin 38 of chip IC10 is connected to one leg of resistor R96. The other leg of resistor R96 is connected to pin 1 of plug J10-2 and one leg of capacitor C58. The other leg of capacitor C58 is connected to the common capacitor COM. Pin 40 of chip IC10 is connected to one leg of resistor R109 and the source of CMOS tube Q5. The other leg of resistor R109 and the gate of CMOS tube Q5 are connected to pin 2 of plug J9-2.The drain of CMOS tube Q5 is connected to pin 3 of plug J9-2, and all common terminal capacitors are connected to COM.

[0069] Furthermore, the display / button module includes:

[0070] Plugs J11-2, J12-2;

[0071] Liquid crystal display module LCM, buttons K1, K2, K3, K4;

[0072] The plug J11-2 is connected to the socket J11-1 of the main control module, and the plug J12-2 is connected to the socket J12-1 of the main control module;

[0073] In the liquid crystal display module LCM, pins 1, 2, 3, and 4 of the LCM are connected to pins 1, 2, 3, and 4 of the plug J11-2 respectively.

[0074] One end of the buttons K1, K2, K3, and K4 are connected to pins 4, 3, 2, and 1 of the plug J12-2, respectively, and the other ends of the buttons K1, K2, K3, and K4 are all connected to pin 1 of the plug J11-2.

[0075] The working process of the above intelligent controller includes the circuit breaker fault detection process, the remote communication control process and the key display control process. Among them, the circuit breaker fault detection process includes:

[0076] 1. Start by powering on;

[0077] 2. The intelligent controller is powered on and initialized to complete the configuration of the I / O ports and register functions of the single-chip microcomputer chip in the main control module, enable interrupts, allocate memory addresses, and clear metering data;

[0078] 3. The controller performs a self-test to determine whether the controller is faulty. If so, proceed to step 4; if not, proceed to step 5;

[0079] 4. Repair or replace the controller;

[0080] 5. Light up the green light-emitting diode LED1, and the controller works normally;

[0081] 6. Cycle and display the active power, reactive power, apparent power, active energy and reactive energy of each phase and the combined phase, the effective value of current, effective value of voltage, power factor and frequency parameters of each phase. The display time of each screen is the time to complete this step.

[0082] 7. Determine whether the circuit breaker is closed. If so, go to step 8; if not, go to step 6.

[0083] 8. Protection current data processing: The single-chip microcomputer chip in the main control module filters, linearizes and converts the detected data, calculates the actual current values of phases A, B and C, finds the maximum current value and the corresponding phase among the three phases, and writes the maximum current value and the corresponding phase into the corresponding address of the E2PROM;

[0084] 9. Determine whether there is a short-circuit instantaneous fault, and compare the maximum current value with the set short-circuit instantaneous current value. If the maximum current value is greater than the set short-circuit instantaneous current value, execute step 10; otherwise, execute step 16;

[0085] 10. Light up the red LED2 and the yellow LED3;

[0086] 11. A tripping command is issued and the circuit breaker is disconnected;

[0087] 12. Set the instantaneous fault type bit to facilitate display or remote reading of the fault type;

[0088] 13. The single-chip microcomputer chip in the main control module reads the date and time of the instantaneous fault from the clock chip and writes it into the corresponding address of the E2PROM of the single-chip microcomputer chip in the main control module, so as to facilitate the display or remote reading of the date and time of the instantaneous fault;

[0089] 14. Display instantaneous fault information, including instantaneous fault type, instantaneous fault current value, fault phase, date and time of fault occurrence;

[0090] 15. Determine whether the transient fault has been eliminated. If so, return to step 3; otherwise, return to step 14;

[0091] 16. Determine whether there is a short circuit short delay fault, compare the maximum current value with the set short circuit short delay current value, if the maximum current value is greater than the set short circuit short delay current value, execute step 17, otherwise, execute step 24;

[0092] 17. Light up the red LED2 and the yellow LED3;

[0093] 18. Determine whether the short circuit short delay time has expired. If so, proceed to step 19; otherwise, proceed to step 24;

[0094] 19. A tripping command is issued and the circuit breaker is disconnected;

[0095] 20. Set the short delay fault type bit to facilitate display or remote reading of the fault type;

[0096] 21. The single-chip microcomputer chip in the main control module reads the date and time of the short-delay fault from the clock chip and writes it into the corresponding address of the E2PROM of the single-chip microcomputer chip in the main control module, so as to facilitate the display or remote reading of the date and time of the short-delay fault;

[0097] 22. Display short-delay fault information, including short-delay fault type, short-delay fault current value, fault phase, date and time of fault occurrence;

[0098] 23. Determine whether the short delay fault is eliminated. If so, return to step 3; otherwise, return to step 22;

[0099] 24. Determine whether there is an overload long delay fault, compare the maximum current value with the set overload long delay current value, if the maximum current value is greater than the set overload long delay current value, execute step 25, otherwise, execute step 32;

[0100] 25. Light up the red LED2 and the yellow LED3;

[0101] 26. Determine whether the overload long delay time has expired. If so, proceed to step 27; otherwise, proceed to step 32;

[0102] 27. A tripping command is issued and the circuit breaker is disconnected;

[0103] 28. Set the long delay fault type bit to facilitate display or remote reading of the fault type;

[0104] 29. The single-chip microcomputer chip in the main control module reads the date and time of the long-delay fault from the clock chip and writes it into the corresponding address of the E2PROM of the single-chip microcomputer chip in the main control module, so as to facilitate the display or remote reading of the date and time of the long-delay fault;

[0105] 30. Display long-delay fault information, including long-delay fault type, long-delay fault current value, fault phase, date and time of fault occurrence;

[0106] 31. Determine whether the long delay fault is eliminated. If so, return to step 3; otherwise, return to step 30;

[0107] 32. Determine whether there is an overload alarm, compare the maximum current value with the set overload alarm current value (I ≥ 1.05IR), if the maximum current value is greater than the set overload alarm current value, execute step 33; otherwise, execute step 36;

[0108] 33. Red LED2 is always on, yellow LED3 is always on;

[0109] 34. Set the overload alarm to facilitate inspection and display or remote reading of the overload type;

[0110] 35. The single-chip microcomputer chip in the main control module writes the date and time of the overload alarm into the corresponding address of the E2PROM of the single-chip microcomputer chip in the main control module, so as to facilitate the inspection display or remote reading of the date and time of the overload alarm, and then execute step 40;

[0111] 36. Determine whether there is an overload pre-alarm, compare the maximum current value with the set overload pre-alarm current value, if the maximum current value is within the overload pre-alarm current value range, execute step 37; otherwise, execute step 40;

[0112] 37. Red LED2 flashes, yellow LED3 is always on;

[0113] 38. Set the overload pre-alarm position to facilitate inspection and display or remote reading of the overload type;

[0114] 39. The single-chip microcomputer chip in the main control module writes the date and time of the overload pre-alarm occurrence into the corresponding address of the single-chip microcomputer chip E2PROM in the main control module, so as to facilitate patrol display or remote reading of the date and time of the overload pre-alarm occurrence, and then execute step 40;

[0115] 40. The single-chip microcomputer chip in the main control module reads the various parameters of the metering chip, and reads the active power, reactive power, apparent power, active energy and reactive energy of each phase and the combined phase, the effective value of the current, the effective value of the voltage, the power factor and the frequency parameters of each phase, and writes them to the corresponding address of the single-chip microcomputer chip E2PROM in the main control module for easy inspection, display or remote reading; finds the maximum voltage value and the corresponding phase among the three phases, and stores the maximum voltage value and the corresponding phase in the corresponding address of the E2PROM; finds the minimum voltage value and the corresponding phase among the three phases, and stores the minimum voltage value and the corresponding phase in the corresponding address of the E2PROM; calculates the imbalance of the three-phase voltage and writes it to the corresponding address of the E2PROM;

[0116] 41. Determine whether there is an overvoltage fault, compare the maximum voltage value with the set overvoltage value, if the maximum voltage value is greater than the set overvoltage value, execute step 42; otherwise, execute step 48;

[0117] 42. Determine whether the overvoltage delay time has expired. If so, proceed to step 43; otherwise, proceed to step 48;

[0118] 43. A tripping command is issued and the circuit breaker is disconnected;

[0119] 44. Set the overvoltage fault type bit to facilitate display or remote reading of the fault type;

[0120] 45. The single-chip microcomputer chip in the main control module writes the date and time of the overvoltage fault into the corresponding address of the E2PROM of the single-chip microcomputer chip in the main control module, so as to facilitate the inspection display or remote reading of the date and time of the overvoltage fault;

[0121] 46. Display overvoltage fault information, including overvoltage fault type, overvoltage fault voltage value, fault phase, date and time of fault occurrence;

[0122] 47. Determine whether the overvoltage fault is eliminated. If so, return to step 3; otherwise, return to step 46;

[0123] 48. Determine whether there is an undervoltage fault, compare the minimum voltage value with the set undervoltage value, if the minimum voltage value is less than the set undervoltage value, execute step 49; otherwise, execute step 55;

[0124] 49. Determine whether the undervoltage delay time has expired. If so, proceed to step 50; otherwise, proceed to step 55;

[0125] 50. A tripping command is issued and the circuit breaker is disconnected;

[0126] 51. Set the undervoltage fault type bit to facilitate display or remote reading of the fault type;

[0127] 52. The single-chip microcomputer chip in the main control module writes the date and time of the undervoltage fault into the corresponding address of the E2PROM of the single-chip microcomputer chip in the main control module, so as to facilitate the display or remote reading of the date and time of the undervoltage fault;

[0128] 53. Display undervoltage fault information, including undervoltage fault type, undervoltage fault voltage value, fault phase, date and time of fault occurrence;

[0129] 54. Determine whether the undervoltage fault is eliminated. If so, return to step 3; otherwise, return to step 53;

[0130] 55. Determine whether there is a phase loss fault, compare the minimum voltage value with the set phase loss voltage value, if the minimum voltage value is less than the set phase loss voltage value, execute step 56; otherwise, execute step 61;

[0131] 56. A tripping command is issued and the circuit breaker is disconnected;

[0132] 57. Set the phase failure fault type bit to facilitate display or remote reading of the fault type;

[0133] 58. The single-chip microcomputer chip in the main control module writes the date and time of the phase failure fault into the corresponding address of the single-chip microcomputer chip E2PROM in the main control module, so as to facilitate the display or remote reading of the date and time of the phase failure fault;

[0134] 59. Display phase loss voltage fault information, including phase loss fault type, phase loss fault voltage value, fault phase, date and time of fault occurrence;

[0135] 60. Determine whether the phase failure fault is eliminated. If so, return to step 3; otherwise, return to step 59;

[0136] 61. Determine whether there is a zero-break fault, compare the three-phase voltage imbalance with the zero-break imbalance value set. If the three-phase voltage imbalance value is greater than the set zero-break imbalance value, execute step 62; otherwise, return to step 3;

[0137] 62. A tripping command is issued and the circuit breaker is disconnected;

[0138] 63. Set the zero-break fault type bit to facilitate display or remote reading of the fault type;

[0139] 64. The single-chip microcomputer chip in the main control module writes the date and time of the zero failure into the corresponding address of the single-chip microcomputer chip E2PROM in the main control module, so as to facilitate the display or remote reading of the date and time of the zero failure.

[0140] 65. Display zero failure information, including zero failure type, zero failure three-phase voltage imbalance value, date and time of failure occurrence;

[0141] 66. Determine whether the zero failure has been eliminated. If so, return to step 3; otherwise, return to step 65.

[0142] The remote communication control process includes:

[0143] 1. Communication interruption entrance;

[0144] 2. Protect the scene and stack;

[0145] 3. Initialize the interrupt, configure the related registers of the transmit and receive interrupt, work mode, enable the transmit and receive interrupt, and set the baud rate;

[0146] 4. Determine whether the address is consistent. Compare the address of the circuit breaker with the address called by the host computer. If yes, go to step 5; otherwise, go to step 11.

[0147] 5. Determine the command classification, compare the received command with the command specified in the protocol, and determine whether the circuit breaker is receiving a command, sending a command, or an illegal command. If it is a sending command, execute step 6; if it is a receiving command, execute step 13; otherwise, execute step 11;

[0148] 6. Read the send flag status of the register to check whether the transmission is ready. If yes, go to step 7; otherwise, go to step 11.

[0149] 7. Send data;

[0150] 8. Determine whether the sending is completed. If so, go to step 9; otherwise, return to step 7;

[0151] 9. Determine whether the sending is correct. If so, go to step 11; otherwise, go to step 10.

[0152] 10. Return ERR error to the host computer;

[0153] 11. Restore the scene and exit the stack;

[0154] 12. Interrupt return;

[0155] 13. Check whether the reception is ready by reading the reception flag status of the register. If yes, go to step 14; otherwise, go to step 11.

[0156] 14. Receive data;

[0157] 15. Determine whether the reception is completed. If so, go to step 16; otherwise, return to step 14;

[0158] 16. Determine whether the reception is correct. If so, go to step 17; otherwise, go to step 18.

[0159] 17. Return the received data to the host computer;

[0160] 11. Restore the scene and exit the stack;

[0161] 12. Interrupt return;

[0162] 18. Return ERR error to the host computer;

[0163] 11. Restore the scene and exit the stack;

[0164] 12. Interrupt return.

[0165] The key display control process includes:

[0166] 1. Key interrupt entry;

[0167] 2. Protect the scene and stack;

[0168] 3. Interrupt the initialization;

[0169] 4. Delay 2s;

[0170] 5. Determine whether a key is pressed; if so, go to step 6; otherwise, go to step 9;

[0171] 6. Key processing: perform corresponding processing according to the functions or combinations corresponding to different keys;

[0172] 7. Display the content corresponding to the button;

[0173] 8. Determine whether to return to the initial interface. If so, go to step 9; otherwise, return to step 6;

[0174] 9. Restore the scene and exit the stack;

[0175] 10. Interrupt return.

[0176] Compared with the prior art, the utility model has the following advantages:

[0177] The utility model relates to an intelligent controller comprising a signal acquisition module, a power module, a metering module, a main control module, and a display / button module, wherein the signal acquisition module is respectively connected to the low-voltage circuit breaker, the power module, the main control module, and the metering module, and the display / button module is respectively connected to the main control module. The signal acquisition module, main control module and metering module realize current protection (long delay protection, short delay protection and instantaneous protection), voltage protection (overvoltage protection, undervoltage protection, phase loss protection and zero failure protection), metering function, communication function and display function, thus reducing the cost. Through the display / key module and the communication interface in the main control module, the power grid can be monitored on-site or remotely. The protection parameters can be adjusted on-site or remotely. The active power, reactive power, apparent power, active energy and reactive energy of each phase and the combined phase, the current of each phase, the effective value of voltage, power factor, frequency and other parameters as well as fault information can be displayed on-site and can be read remotely. The circuit breaker can be remotely opened. The data can also be displayed on-site or read remotely after power failure, thus realizing the intelligent and remote centralized management requirements of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0178] Figure 1 This is a schematic diagram of the connection structure of the intelligent controller in the present utility model;

[0179] Figure 2 Schematic diagram of the circuit structure of the signal acquisition module;

[0180] Figures 3a to 3i This is a schematic diagram of the circuit structure of each part in the power module;

[0181] Figures 4a to 4i This is a schematic diagram of the circuit structure of each part in the main control module;

[0182] Figures 5a to 5d It is a schematic diagram of the circuit structure of each part in the metering module;

[0183] Figures 6a-6b This is a schematic diagram of the circuit structure of each part in the display / button module;

[0184] Explanation of the marks in the figure: 1. Circuit breaker, 2. Voltage acquisition unit, 3. Metering current acquisition unit, 4. Protection current acquisition unit, 5. Metering voltage signal processing unit, 6. Metering current signal processing unit, 7. Metering processing unit, 8. Protection current signal processing unit, 9. Level conversion unit, 10. Microprocessor unit, 11. Circuit breaker status detection unit, 12. Tripping control unit, 13. Circuit breaker operation status indication unit, 14. Clock unit, 15. Communication interface unit, 16. Liquid crystal display unit, 17. Key unit, 18. Power supply unit, 19. Download interface, 20. Handheld programmer interface, 21. User / communication interface. DETAILED DESCRIPTION

[0185] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0186] Example

[0187] like Figure 1 As shown, the utility model proposes an intelligent controller suitable for universal low-voltage circuit breakers, which adopts a modular design and includes five modules: a signal acquisition module, a power module, a metering module, a main control module, and a display / button module; the mutual connection relationship between the above modules is: the signal acquisition module is connected to the circuit breaker 1, the power module, the metering module, and the main control module; the power module is connected to the signal acquisition module, the metering module, the main control module, and the display / button module; the metering module is connected to the power module and the main control module; the main control module is connected to the power module, the signal acquisition module, the metering module, and the display / button module; and the display / button module is connected to the power module and the main control module.

[0188] Each module in the present utility model is composed of different units. The signal acquisition module is composed of a voltage acquisition unit 2, a metering current acquisition unit 3, and a protection current acquisition unit 4. The power supply module is composed of a power supply unit 18. The metering module is composed of a metering voltage signal processing unit 5, a metering current signal processing unit 6, and a metering processing unit 7. The main control module is composed of a protection current signal processing unit 8, a level conversion unit 9, a microprocessor unit 10, a circuit breaker status detection unit 11, a tripping control unit 12, a circuit breaker operation status indication unit 13, a clock unit 14, a communication interface unit 15, a download interface 19, a handheld programmer interface 20, and a user / communication interface 21. The display / button module is composed of a liquid crystal display unit 16 and a button unit 17.

[0189] Among them, the voltage acquisition unit 2 is directly connected to the row on the incoming line side of the molded case circuit breaker 1, the metering current acquisition unit 3 and the protection current acquisition unit 4 are directly installed on the row on the outgoing line side of the molded case circuit breaker 1, the voltage acquisition unit 2 is connected to the power supply unit 18 and the metering voltage signal processing unit 5, the metering current acquisition unit 3 is connected to the metering current signal processing unit 6, the protection current acquisition unit 4 is connected to the protection current signal processing unit 8, the metering voltage signal processing unit 5 is connected to the metering processing unit 7, the metering current signal processing unit 6 is connected to the metering processing unit 7, the protection current signal processing unit 8 is connected to the microprocessor unit 10, the metering processing unit 7 is connected to the level conversion unit 9, and the level conversion Unit 9 is connected to the microprocessor unit 10 and the liquid crystal display unit 16. The microprocessor unit 10 is connected to the circuit breaker state detection unit 11, the trip control unit 12, the circuit breaker operation state indication unit 13, the clock unit 14, the communication interface unit 15, the download interface 19, the handheld programmer interface 20, the user / communication interface 21, and the key unit 17. The power supply unit 18 is connected to the metering processing unit 7, the protection current signal processing unit 8, the level conversion unit 9, the microprocessor unit 10, the circuit breaker state detection unit 11, the trip control unit 12, the circuit breaker operation state indication unit 13, the clock unit 14, the communication interface unit 15, the liquid crystal display unit 16, and the key unit 17.

[0190] Specifically, such as Figure 2 As shown, the signal acquisition module includes: a connector, a voltage acquisition unit, a protection current acquisition unit, and a metering current acquisition unit.

[0191] 1. Components:

[0192] Connectors: J1-2, J2-2, J3-2, J6-2;

[0193] Voltage acquisition unit: connecting plug J1-2, 500V high temperature resistant wire;

[0194] Protection current acquisition unit: connecting plug J2-2, 300V high temperature resistant wire, current transformer CTA, CTB, CTC;

[0195] Metering current acquisition unit: connecting plug J3-2, 300V high temperature resistant wire, current transformer CTAJ, CTBJ, CTCJ;

[0196] 2. Component parameters / models:

[0197] Voltage acquisition unit: The connecting plug J1-2 uses a 3-core single-row straight plug with a terminal spacing of 2.54mm and a 500V high-temperature resistant wire length of 200mm;

[0198] Protection current acquisition unit: The connection plug J2-2 uses a 6-core single-row straight plug with a terminal spacing of 1.27mm, a 300V high-temperature resistant wire length of 200mm, and the protection current transformer selection is shown in Table 1.

[0199] Table 1 Specifications of protection current transformer

[0200] Circuit breaker rated current Transformer ratio 100A 100A: 60mA 250A 250A:60mA 400A 400A: 60mA 630A 630A: 60mA

[0201] Metering current acquisition unit: The connecting plug J3-2 uses a 6-core single-row straight plug with a terminal spacing of 1.27mm, a 300V high-temperature resistant wire length of 200mm, and the metering current transformer selection is shown in Table 2.

[0202] Table 2 Specifications of metering current transformer

[0203] Circuit breaker rated current Transformer ratio 100A 100A: 25mA 250A 250A: 25mA 400A 400A: 25mA 630A 630A: 25mA

[0204] Connector: The connecting plug J6-2 uses a 2-core single-row straight plug with a terminal spacing of 2.54mm;

[0205] 3. Connection between components:

[0206] Connectors: J1-2 is connected to the power module J1-1, J2-2 is connected to the main control module J2-1, J3-2 is connected to the metering module J3-1, and J6-2 is connected to the main control module J6-1;

[0207] Voltage acquisition unit: One end of the voltage acquisition connecting wire UA is connected to phase A on the incoming line side of the circuit breaker, and the other end is connected to pin 3 of plug J1-2. One end of the voltage acquisition connecting wire UB is connected to phase B on the incoming line side of the circuit breaker, and the other end is connected to pin 2 of plug J1-2. One end of the voltage acquisition connecting wire UC is connected to phase C on the incoming line side of the circuit breaker, and the other end is connected to pin 1 of plug J1-2. Plug J1-2 is connected to socket J1-1 of the power module.

[0208] Protection current acquisition unit: one end of the protection current acquisition connecting wire CTA1 is connected to one pin of the A current mutual inductor CTA installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 6 of the plug J2-2. one end of the protection current acquisition connecting wire CTA2 is connected to the other pin of the A current mutual inductor CTA installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 5 of the plug J2-2. one end of the protection current acquisition connecting wire CTB1 is connected to one pin of the B current mutual inductor CTB installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 4 of the plug J2-2. One end of the connecting wire CTB2 is connected to the other pin of the B current transformer CTB installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 3 of the plug J2-2. One end of the protective current collection connecting wire CTC1 is connected to one pin of the C current transformer CTC installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 2 of the plug J2-2. One end of the protective current collection connecting wire CTC2 is connected to the other pin of the C current transformer CTC installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 1 of the plug J2-2. The plug J2-2 is connected to the socket J2-1 of the main control module.

[0209] Metering current collection unit: One end of the metering current collection connecting wire CTAJ1 is connected to one pin of the A current mutual inductor CTAJ installed on the outgoing line side of the circuit breaker, and the other end is connected to the 6th pin of the plug J3-2. One end of the metering current collection connecting wire CTAJ2 is connected to the other pin of the A current mutual inductor CTAJ installed on the outgoing line side of the circuit breaker, and the other end is connected to the 5th pin of the plug J3-2. One end of the metering current collection connecting wire CTBJ1 is connected to one pin of the B current mutual inductor CTBJ installed on the outgoing line side of the circuit breaker, and the other end is connected to the 4th pin of the plug J3-2. One end of the connecting wire CTBJ2 is connected to the other pin of the B current transformer CTBJ installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 3 of the plug J3-2. One end of the metering current collection connecting wire CTCJ1 is connected to one pin of the C current transformer CTCJ installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 2 of the plug J3-2. One end of the metering current collection connecting wire CTCJ2 is connected to the other pin of the C current transformer CTCJ installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 1 of the plug J3-2. The plug J3-2 is connected to the socket J3-1 of the metering module.

[0210] like Figures 3a to 3i As shown, the power module includes a connector ( Figure 3a ), surge protection unit ( Figure 3b )、12V switching regulated power supply ( Figure 3c )、5V regulated power supply( Figure 3d )、4.2V lithium battery automatic charging unit ( Figure 3e), automatic switching unit between system power supply and lithium battery power supply ( Figure 3f )、5V boost regulator unit ( Figure 3g )、3.3V voltage regulator unit ( Figure 3h ).

[0211] 1. Components:

[0212] Connectors: J1-1, J4-1, J5-1, J7-1;

[0213] Surge protection unit: varistors RV1, RV2, RV3;

[0214] 12V switching regulated power supply unit: resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, capacitors C1, C2, C3, C4, C5, C6, C7, C8, C9, C69, rectifier bridge B1, diodes D1, D2, D4, D5, D6, transformer T1, integrated circuit IC1, CMOS tube Q1;

[0215] 5V regulated power supply unit: diode D13, capacitors C72, C10, C11, C12, integrated circuit IC2;

[0216] 4.2V lithium battery automatic charging unit: resistor R16, capacitor C13, integrated circuit IC3, lithium battery connector J7-1;

[0217] Automatic switching unit between system power supply and lithium battery power supply: resistor R17, capacitors C14 and C15, diode D7, CMOS tube Q2;

[0218] 5V boost voltage regulator unit: resistors R19, R20, capacitors C16, C17, inductor L2, diode D8, CMOS tube Q3, integrated circuit IC4;

[0219] 3.3V voltage regulator unit: resistors R21, R22, R23, capacitors C18, C19, C20, C21, inductor L3, integrated circuit IC5;

[0220] Two common terminal connection units: capacitor C71;

[0221] 2. Component parameters / models:

[0222] Connectors: J1-1 uses a 3-core single-row straight socket with a terminal pitch of 2.54mm, J4-1 uses a 4-core single-row straight socket with a terminal pitch of 2.54mm, J5-1 uses a 6-core single-row pin-type straight socket with a terminal pitch of 2.54mm, and J7-1 uses a 2-core single-row straight socket with a terminal pitch of 2.54mm.

[0223] Surge protection unit: varistor RV1, RV2, RV3 uses 471KD12;

[0224] 12V switching power supply unit: Resistor R1 uses a resistance of 5Ω and a power of 3W, resistors R2, R3, and R4 use a resistance of 33KΩ and a power of 1W, resistor R5 uses a resistance of 50KΩ and a power of 2W, R6 uses a resistance of 22Ω and a power of 1W, resistor R7 uses a resistance of 20KΩ, resistor R8 uses a resistance of 5.7KΩ, resistors R9 and R14 use a resistance of 10KΩ, resistor R10 uses a resistance of 15.4KΩ, resistor R11 uses a resistance of 4.2KΩ, resistor R12 uses a resistance of 0.75Ω, resistor R13 uses a resistance of 10Ω, resistor R15 uses a resistance of 2.7KΩ, capacitor C1 uses a 180μF / 1000V electrolytic capacitor, capacitor C2 uses a capacitance of 10nF / 1000V, capacitor C3 uses a capacitance of 0.1μF / 50V, capacitor C4 uses a capacitance of 12 0μF / 50V electrolytic capacitor, capacitor C5 uses a capacitance of 1μF / 50V, capacitor C6 uses a capacitance of 10nF / 50V, capacitor C7 uses a capacitance of 1000pF / 50V, capacitor C8 uses a capacitance of 100pF / 50V, capacitor C9 uses an electrolytic capacitor with a capacitance of 2200μF / 50V, capacitor C69 uses a capacitance of 680pF / 1000V, rectifier bridge B1 uses MB6S, diodes D1 and D5 use 1N3613, diode D2 uses 1N2613, diode D4 uses USD1120 Schottky diode, diode D6 uses 48CTQ060 Schottky diode, transformer T1 winding ratio Np:Ns=10, Np:Na=10, integrated circuit IC1 uses UC3842, CMOS tube Q1 uses IRFB9N65A;

[0225] 5V regulated power supply unit: diode D13 uses 1SS181, capacitor C72 uses 47μF / 25V electrolytic capacitor, capacitor C10 uses 1μF / 50V, capacitor C11 uses 0.1μF / 25V, capacitor C12 uses 10μF / 25V electrolytic capacitor, integrated circuit IC2 uses LT1761ES5;

[0226] 4.2V lithium battery automatic charging unit: Resistor R16 uses a 2KΩ resistance and 1% accuracy, capacitor C13 uses a 10μF / 50V tantalum capacitor, integrated circuit IC3 uses a TP4055, and the lithium battery connection socket J7-1 uses a 2-core single-row straight socket with a terminal spacing of 2.54mm;

[0227] Automatic switching unit between system power supply and lithium battery power supply: resistor R17 uses 10KΩ, capacitor C14 uses 100μF / 16V electrolytic capacitor, capacitor C15 uses 0.1μF / 50V, diode D7 uses 1N5819 Schottky, CMOS tube Q2 uses S12301;

[0228] 5V boost voltage regulator unit: Resistor R19 uses a 30KΩ resistance and 1% precision; resistor R20 uses a 10KΩ resistance and 1% precision; capacitor C16 uses a 47μF / 16V electrolytic capacitor; capacitor C17 uses a 0.1μF / 50V; inductor L2 uses a 22μH; diode D8 uses a 1N5819; CMOS tube Q3 uses an S12301; integrated circuit IC4 uses a SY3129;

[0229] 3.3V voltage regulator unit: Resistor R21 uses a resistance of 453KΩ and an accuracy of 1%, resistor R22 uses a resistance of 100KΩ and an accuracy of 1%, resistor R23 uses a resistance of 4.7KΩ, capacitors C18, C19, and C21 use 0.1μF / 50V, capacitor C20 uses 47μF / 16V, inductor L3 uses 2.2μH, and integrated circuit IC5 uses APW7104;

[0230] Two common terminal connection units: capacitor C71 uses 10nF / 1000V;

[0231] 3. Connection between components:

[0232] Connections between the connectors and modules: Socket J1-1 is connected to plug J1-2 of the signal acquisition module, socket J4-1 is connected to plug J4-2 of the metering module, socket J5-1 is connected to plug J5-2 of the main control module, socket J7-1 is connected to the plug of the lithium battery, and pin 1 of J4-1 is connected to pin 5 of J5-1;

[0233] Surge protection unit: One pin of RV1 is connected to pin 3 of J1-1, pin 4 of J4-1, and one pin of R1. The other pin of RV1 is connected to pin 1 of J4-1 and pin 2 of B1. One pin of RV2 is connected to pin 2 of J1-1 and pin 3 of J4-1. The other pin of RV2 is connected to pin 1 of J4-1. One pin of RV3 is connected to pin 1 of J1-1 and pin 2 of J4-1. The other pin of RV3 is connected to pin 1 of J4-1.

[0234] 12V switching voltage regulator circuit unit: one pin of R1 is connected to one pin of RV1 and pin 3 of J1-1, the other pin of R1 is connected to pin 1 of rectifier bridge B1, pin 2 of B1 is connected to pin 1 of J4-1 and pin 5 of J5-1, pin 3 of B1 is connected to the ground terminal GND on the power supply side, the positive electrode of the starting capacitor C1 is connected to pin 4 of B1, and the negative electrode is connected to the ground terminal GND on the power supply side. After R2, R3, and R4 are connected in series, the other pin of R2 is connected to pin 4 of B1 and the positive electrode of C1, and the other pin of R4 is connected to pin 7 of IC1 to provide initial starting voltage for IC1. Pin 1 of transformer T1 is connected to pin 4 of B1. After R5 and C2 are connected in parallel, one end is connected to pin 1 of T1, and the other end is connected to pin 1 of D1. The negative pole is connected, the positive pole of D1 is connected to the 2nd pin of T1, R5, C2, and D1 form a discharge circuit, C3 and C4 are connected in parallel, one end of the positive pole of C4 is connected to the 7th pin of IC1 and the negative pole of D2, one end of the negative pole of C4 is connected to the ground terminal GND on the power supply side, the positive pole of D2 is connected to one pin of R6, the other pin of R6 is connected to the 5th pin of T1, and the 6th pin of T1 is connected to the ground terminal GND on the power supply side. C3, C4, D2, R6, and T1 provide the working voltage for IC1. After R7 and R8 are connected in series, the other pin of R7 is connected to the 7th pin of IC1, and the other pin of R8 is connected to the ground terminal GND on the power supply side. After R9 and C6 are connected in parallel, one end is connected to the 1st pin of IC1 and the other end is connected to the 2nd pin of IC1. R7, R8 The connection plays the role of regulating voltage. Pin 3 of IC1 is connected to C8 and one pin of R11. The other pin of C8 is connected to the ground terminal GND on the power supply side. The other pin of R11 is connected to the source of the CMOS tube and one pin of R12. The other pin of R12 is connected to the ground terminal GND on the power supply side. The current detection network is composed of R11, R12, and C8. Pin 4 of IC1 is connected to R10 and one pin of C7. The other pin of C7 is connected to the ground terminal GND on the power supply side. The other pin of R10 is connected to pin 8 of IC1. R10 and C7 adjust the oscillation frequency and maximum duty cycle of IC1. Pin 5 of IC1 is connected to the ground terminal GND on the power supply side. Pin 6 of IC1 is connected to the negative electrode of D4 and one pin of R13. The positive electrode of D4 is connected to the ground terminal GND on the power supply side. The other leg of R13 is connected to the gate of the CMOS tube and one leg of R14. The other leg of R14 is connected to the ground terminal GND on the power supply side. The drain of the CMOS tube is connected to pin 2 of T1 and one leg of C69. The other leg of C69 is connected to the positive electrode of D5 and one leg of R15. The negative electrode of D5 and the other leg of R15 are connected to the ground terminal GND on the power supply side. C69, D5 and R15 protect Q1. The positive electrode of D6 is connected to pin 3 of T1. The negative electrode of D6 is connected to the positive electrode of C9 and pin 4 of J5-1 to provide 12VDC power for the system. The other leg of C9 and pin 4 of T1 are connected to the common terminal COM on the system side.

[0235] 5V voltage regulator circuit unit: The positive pole of D13 is connected to the negative pole of D6 and pin 4 of J5-1, and the negative pole of D13 is connected to pins 1 and 3 of IC2. D13 plays a protective role. When the polarity of the external auxiliary 12VDC is reversed, D13 is cut off and cannot provide power to the control. After C72 and C10 are connected in parallel, the positive terminal of C72 is connected to pins 1 and 3 of IC2, the negative terminal of C72 and pin 2 of IC2 are connected to the system-side common terminal COM, one pin of C11 is connected to pin 4 of IC2, and the other pin is connected to pin 5 of IC2, pin 5 of IC2 is connected to the positive pole of C12, and the other pin of C12 is connected to the system-side common terminal COM;

[0236] 4.2V lithium battery automatic charging unit: Pins 1 and 2 of IC3 are connected to the system-side common terminal COM, pin 5 of IC3 is connected to the system-side common terminal COM through R16, pin 4 of IC3 is connected to pin 5 of IC2, pin 3 of IC3 is connected to one pin of C13, pin 2 of J7-1, and the drain of CMOS tube Q2, the other pin of C13 and pin 1 of J7-1 are connected to the system-side common terminal COM, pin 2 of J7-1 is connected to the positive terminal of the lithium battery, and pin 1 of J7-1 is connected to the negative terminal of the lithium battery;

[0237] Automatic switching unit between system power supply and lithium battery power supply: the gate of CMOS tube Q2 is connected to pin 5 of IC2, one pin of R17, and the positive electrode of D7; the other pin of R17 is connected to the system-side common terminal COM; the drain of CMOS tube Q2 is connected to pin 3 of IC3; the source of CMOS tube Q2 is connected to the negative electrode of D7, the positive electrode of C14, and one pin of C15; the negative electrode of C14 and the other pin of C15 are connected to the system-side common terminal COM. When the system is powered, Q2 is cut off; when the system fails to power, Q2 is turned on and powered by the lithium battery, ensuring that the control can work normally during a power outage;

[0238] 5V boost voltage regulator unit: one pin of L2 is connected to the source of CMOS tube Q2, the other pin of L2 is connected to the positive electrode of D8 and the drain of CMOS tube Q3, the gate of Q3 is connected to pin 5 of IC4, the negative electrode of D8 is connected to one pin of R19, the positive electrode of C16, one pin of C17, and pin 3 of J5-1 to provide 5VDC power supply, the other pin of R19 is connected to pin 5 of IC4 and one pin of R20, the other pin of R20, the negative electrode of C16, the other pin of C17, and pin 4 of IC4 are connected to the system side common terminal COM, and pins 2 and 3 of IC4 are connected to the source of Q2. When powered by the system, a stable 5V power supply is maintained. When powered by a lithium battery, this circuit will boost the lithium battery voltage to 5V and still maintain a stable 5V power supply.

[0239] 3.3V voltage regulator unit: Pins 1 and 4 of IC5 are connected to the negative terminal of D8 and one pin of C18. The other pin of C18 and pin 2 of IC5 are connected to the system-side common terminal COM. Pin 3 of IC5 is connected to one pin of L3. The other pin of L3 is connected to one pin of R21, one pin of C19, the positive terminal of C20, one pin of C21, one pin of R23, and pin 2 of J5-1 to provide 3.3VDC power supply. The other pin of R21 is connected to the other pin of C19, one pin of R22, and pin 5 of IC5. The other pin of R22, the negative terminal of C20, the other pin of C21, and the other pin of R23 are connected to the system-side common terminal COM.

[0240] Two common terminal connection units ( Figure 3i ) : Connect capacitor C71 in series between the power supply side ground terminal GND and the system side common terminal COM. All power supply side ground terminals GND are connected, and all system side common terminals COM are connected.

[0241] Connections of each connector: Pin 4, Pin 3, and Pin 2 of socket J4-1 are connected to Pin 3, Pin 2, and Pin 1 of socket J1-1 respectively; Pin 1 of J4-1 is connected to Pin 5 of J5-1; Pin 5 of socket J5-1 is connected to Pin 5 of main control module plug J5-2; Pin 4 of J5-1 is connected to the negative pole of D6 to provide 12VDC power supply; Pin 3 of J5-1 is connected to the negative pole of D8 to provide 5VDC power supply; Pin 2 of J5-1 is connected to one pin of L3 to provide 3.3VDC power supply; Pin 1 of J5-1 is connected to the system side common terminal COM.

[0242] like Figures 4a to 4i As shown, the main control module includes: connector ( Figure 4a )、Protection current signal processing unit ( Figure 4h )、trip control unit ( Figure 4b ), circuit breaker operation status indication unit ( Figure 4c ), Communication Interface Unit ( Figure 4d ), level conversion unit ( Figure 4e ), circuit breaker opening and closing status detection unit ( Figure 4f ), clock unit( Figure 4g ), microprocessor unit ( Figure 4i ).

[0243] 1. Components:

[0244] Connectors: Connect sockets J2-1, J6-1, J8-1, J9-1, J10-1, J11-1, J12-1, J13-1, J14-1, J15-1, and connector plug J5-2;

[0245] Protection current signal processing unit: rectifier bridges B2, B3, B4, resistors R60, R61, R62, R63, R64, R65, R66, R67, R68, R69, R70, R71, R72, R73, R74, capacitors C34, C35, C36, C37, C38, C39, C40, amplifier IC9;

[0246] Trip control unit: diodes D9, D10, D12, D11, capacitors C65, C66, C67, resistors R100, R101, transistor Q4, J6-1;

[0247] Circuit breaker operation status indication unit: resistors R88, R87, R86, light-emitting diodes LED1, LED2, LED3;

[0248] Communication interface unit: resistors R79, R80, R81, R77, R78, transceiver chip IC7, capacitor C47;

[0249] Level conversion unit: resistor R106, capacitors C77, C78, level conversion chip IC11;

[0250] Circuit breaker opening and closing status detection unit: resistor R85, J8-1;

[0251] Clock unit: resistors R82, R83, R84, capacitors C48, C49, crystal oscillator XT3, clock chip IC8;

[0252] Microprocessor unit: resistors R75, R76, R102, R103, R104, R105, R89, R90, R91, R92, R108, capacitors C41, C42, C43, C44, C45, C46, C73, C74, crystal oscillator XT1, inductor L1, microprocessor IC6;

[0253] 2. Component parameters / models:

[0254] Connectors: J2-1 uses a 6-core single-row straight socket with a terminal pitch of 1.27mm, J6-1 uses a 2-core single-row straight socket with a terminal pitch of 2.54mm, J8-1 uses a 2-core single-row straight socket with a terminal pitch of 2.54mm, J9-1 uses a 5-core single-row side-lying patch socket with a terminal pitch of 1.27mm, J10-1 uses a 4-core single-row side-lying patch socket with a terminal pitch of 1.27mm, J11-1 uses a 4-core single-row straight pin socket with a terminal pitch of 2.54mm, J12-1 uses a 4-core single-row straight pin socket with a terminal pitch of 2.54mm, J13-1 uses a 6-core single-row straight socket with a terminal pitch of 1.27mm, J14-1 uses a pluggable Phoenix terminal with a terminal pitch of 3.81mm, J15-1 uses a 5-core single-row straight socket with a terminal pitch of 1.27mm, and J5-2 uses a 5-core single-row straight pin plug with a terminal pitch of 2.54mm.

[0255] Protection current signal processing unit: rectifier bridges B2, B3, and B4 use BM6S, resistors R60, R61, and R62 use a resistance of 2Ω, resistors R63, R64, and R65 use a resistance of 470Ω, resistors R66, R67, R68, R72, R73, and R74 use a resistance of 47KΩ, resistors R69, R70, and R71 use a resistance of 1KΩ, capacitors C34, C35, C36, C38, C39, and C40 use 1μF / 50V, capacitor C37 uses 0.1μF / 50V, and amplifier IC9 uses MCP6004;

[0256] Trip control unit: Diodes D9 and D11 use 1N4007, diodes D10 and D12 use 1SS181, capacitor C65 uses a 220μF / 25V electrolytic capacitor, capacitors C66 and C67 use 0.1μF / 50V, resistor R100 uses a resistance of 47kΩ, resistor R101 uses a resistance of 1kΩ, transistor Q4 uses SS8050, and J6-1 uses a 2-core single-row straight socket with a terminal spacing of 2.54mm;

[0257] Circuit breaker operation status indication unit: resistors R88, R87, and R86 use a resistance of 1kΩ, light-emitting diode LED1 uses a green patch, light-emitting diode LED2 uses a red patch, and light-emitting diode LED3 uses a yellow patch;

[0258] Communication interface unit: resistors R79, R80, and R81 use a resistance of 47kΩ, resistors R77 and R78 use a resistance of 0Ω, transceiver chip IC7 uses 1487E, and capacitor C47 uses 0.1μF / 50V;

[0259] Level conversion unit: resistor R106 uses a resistance of 4.7kΩ, capacitors C77 and C78 use 0.1μF / 50V, and level conversion chip IC11 uses TXS0108E;

[0260] Circuit breaker opening and closing status detection unit: Resistor R85 uses a resistance of 47kΩ, and J8-1 uses a 2-core single-row straight socket with a terminal spacing of 2.54mm;

[0261] Clock unit: resistors R82, R83, and R84 use 47kΩ, capacitors C48 and C49 use 22F / 50V, crystal oscillator XT3 uses 32.768KHz, and clock chip IC8 uses DS1302;

[0262] Microprocessor unit: Resistor R75 uses a resistance of 10kΩ, resistors R76, R102, R103, R104, R105, R89, R90, R91, R92, and R108 use a resistance of 47kΩ, capacitor C41 uses a 10μF / 16V electrolytic capacitor, capacitors C42, C44, C73, and C74 use a 0.1μF / 50V, capacitor C43 uses a 4.7μF / 16V electrolytic capacitor, capacitors C45 and C46 use 30pF / 50V, crystal oscillator XT1 uses a 12MHz value, inductor L1 uses a 10μH value, and microprocessor IC6 uses an ATMEGA32A;

[0263] 3. Connection between components:

[0264] Connections between the connectors and modules: J2-1 is connected to J2-2 of the signal acquisition module, J5-2 is connected to J5-1 of the power module, J6-1 is connected to J6-2, the trip actuator plug installed on the circuit breaker, J8-1 is connected to the auxiliary normally open contact installed on the circuit breaker and is used to determine the closing and opening status of the circuit breaker, J9-1 and J10-1 are connected to J9-2 and J10-2 of the metering module respectively, J11-1 and J12-1 are connected to J11-2 and J12-2 of the display / key module respectively, J13-1 is the program download interface, J14-1 is the user-end interface, and J15-1 is the handheld programmer interface;

[0265] Protection current signal processing unit: connections between the components of the A-phase current rectification, current-voltage conversion, filtering, and amplification circuits. Connect pin 1 of the rectifier bridge B2 to pin 6 of J2-1, pin 2 of B2 to pin 5 of J2-1, one pin of R60 and R63 to pin 4 of B2, the other pin of R60 and pin 3 of B2 to the common terminal COM, the other pin of R63 to R66 and one pin of C34, the other pin of C34 and one pin of R69 to the common terminal COM, the other pin of R66 and one pin of R72 to pin 2 of IC9, the other pin of R69 to the common terminal COM, One pin is connected to pin 3 of IC9, the other pin of R72 is connected to pin 1 of IC9, one pin of C38, and pin 37 of IC6, the other pin of C38 and one pin of C37 are connected to the common terminal COM, the other pin of C37 is connected to pin 4 of IC9 and pin 3 of J5-2; the connection between the components of the B-phase current rectification, current-voltage conversion, filtering, and amplification circuits: pin 1 of the rectifier bridge B3 is connected to pin 4 of J2-1, pin 2 of B3 is connected to pin 3 of J2-1, one pin of R61 and R64 is connected to pin 4 of B3, the other pin of R61 and pin 3 of B3 are connected to the common terminal COM. The other leg of R64 is connected to R67 and one leg of C35. The other leg of C35 and one leg of R70 are connected to the common terminal COM. The other leg of R67 and one leg of R73 are connected to pin 5 of IC9. The other leg of R70 is connected to pin 6 of IC9. The other leg of R73 is connected to pin 7 of IC9, one leg of C39 and pin 36 of IC6. The other leg of C39 is connected to the common terminal COM. The connection between the components of the C-phase current rectification, current-voltage conversion, filtering and amplification circuits: Pin 1 of the rectifier bridge B4 is connected to pin 2 of J2-1. Connect pin 2 of 4 to pin 1 of J2-1, one pin of R62 and R65 to pin 4 of B4, the other pin of R62 and pin 3 of B4 to the common terminal COM, the other pin of R65 to R68 and one pin of C36, the other pin of C36 and one pin of R71 to the common terminal COM, the other pin of R68 and one pin of R74 to pin 9 of IC9, the other pin of R71 to pin 10 of IC9, the other pin of R74 to pin 8 of IC9, one pin of C40 and pin 35 of IC6, and the other pin of C40 to the common terminal COM;

[0266] Trip control unit: The positive electrode of C65, one pin of C66, and the positive electrode of D9 are connected to pin 4 of J5-2. The negative electrode of C65 and the other pin of C66 are connected to the common terminal COM. The negative electrode of D9 is connected to the negative electrode of D10, pin 2 of J6-1, and the negative electrode of D12. The positive electrode of D10 is connected to the negative electrode of D12, R100, R101, and pin 5 of J14-1. The positive electrode of D12 is connected to pin 11 of IC6. The other pin of R100 is connected to the common terminal COM. The other pin of R101 is connected to the base of transistor Q4 and one pin of C67. The other pin of C67 and the emitter of Q4 are connected to the common terminal COM. The collector of Q4 is connected to the positive electrode of D11 and pin 1 of J6-1. J6-1 is connected to the trip actuator plug J6-2 installed on the circuit breaker.

[0267] Circuit breaker operation status indication unit: one pin of R86, R87, and R88 is connected to pin 3 of J5-2, the other pins of R86, R87, and R88 are connected to the positive poles of LED1, LED2, and LED3 respectively, and the negative poles of LED1, LED2, and LED3 are connected to pins 26, 25, and 24 of IC6 respectively;

[0268] Communication interface unit: Pin 1, 4, 2, and 3 of IC7 are connected to one pin of R80, R79, and R81, and pin 9, 10, and 40 of IC6 respectively. The other pins of R79, R80, and R81 are connected to pin 3 of J5-2. Pin 5 of IC7 is connected to the common terminal COM. Pin 6 and 7 of IC7 are connected to one pin of R78 and R77 respectively. The other pins of R78 and R77 are connected to pin 3 and pin 4 of J14-1 respectively. Pin 8 of IC7 is connected to pin 3 of J5-2 and one pin of C47. The other pin of C47 is connected to the common terminal COM.

[0269] Level conversion unit: Pin 2 of IC11 is connected to one pin of C77 and pin 2 of J5-2, the other pin of C77 is connected to the common terminal COM, pin 19 of IC11 is connected to one pin of C78 and pin 3 of J5-2, the other pin of C78 is connected to the common terminal COM, pin 10 of IC11 is connected to one pin of R106 and the other pin of R106 is connected to pin 2 of J5-2, pin 11 of IC11 is connected to the common terminal COM, pin 1 and pin 3 of IC11 are connected to the common terminal COM. Pins 1, 2, 3, 4, and 5 of IC11 are connected to pins 4, 2, 1, and 3 of J10-1 respectively. Pins 6 and 7 of IC11 are connected to pins 5 and 4 of J9-1 respectively. Pins 8 and 9 of IC11 are connected to pins 4 and 3 of J11-1 respectively. Pins 12, 13, 14, 15, 16, 17, 18, and 20 of IC11 are connected to pins 20, 19, 42, 41, 3, 2, 1, and 43 of IC6 respectively.

[0270] Circuit breaker opening and closing status detection unit: one pin of R85 is connected to pin 3 of J5-2, the other pin of R85 is connected to pin 23 of IC6 and pin 2 of J8-1, pin 1 of J8-1 is connected to the common terminal COM, and J8-1 is connected to the auxiliary normally open contact installed on the circuit breaker to determine the closing and opening status of the circuit breaker;

[0271] Clock unit: Pins 1 and 8 of IC8 are connected to pin 3 of J5-1. Pin 2 of IC8 is connected to one pin of crystal oscillator XT3 and one pin of C49. The other pin of C49 is connected to the common terminal COM. Pin 3 of IC8 is connected to the other pin of crystal oscillator XT3 and one pin of C48. The other pin of C48 is connected to the common terminal COM. Pin 4 of IC8 is connected to the common terminal COM. Pin 5 of IC8 is connected to pin 22 of IC6 and one pin of R84 to control the read and write operations of IC8. Pins 6 and 7 of IC8 are connected to R83, R82, and pin 1 and pin 3 of IC6 respectively. The other pins of R82, R83, and R84 are connected to pin 3 of J5-2.

[0272] Microprocessor unit: one foot of R75 is connected to pin 3 of J5-2, the other foot of R75 is connected to the positive electrode of C41 and pin 4 of IC7, the negative electrode of C41 is connected to the common terminal COM, one foot of R76, R102, R103, R104, R105, R89, R90, R91, R92, and R108 is connected to pin 3 of J5-2, one foot of R76, R102, R103, R104, R105, R89, R90, R91, R92, and R108 is connected to pin 44, Pin 43, pin 2, pin 19, pin 20, pin 12, pin 13, pin 14, pin 15, and pin 16 are connected. Pin 7 of IC6 is connected to one pin of crystal oscillator XT1 and one pin of C46. The other pin of C46 is connected to the common terminal COM. Pin 8 of IC6 is connected to the other pin of crystal oscillator XT1 and one pin of C45. The other pin of C45 is connected to the common terminal COM. Pin 27 of IC6 is connected to one pin of inductor L1, one pin of C44, and pin 29 of IC6. The other pin of L1 is connected to pin 3 of J5-2. The other foot of 44 is connected to the common terminal COM, the 5th, 17th and 38th feet of IC6 are connected to the 3rd foot of J5-2, the 6th, 18th and 39th feet of IC6 are connected to the common terminal COM, the 16th foot of IC6 is connected to the 3rd foot of J9-1, the 12th, 13th, 14th and 15th feet of IC6 are connected to the 4th, 3rd, 2nd and 1st feet of J12-1 respectively, after C43, C42, C73 and C74 are connected in parallel, the positive end of C43 is connected to the 3rd foot of J5-2, and the negative end is connected to the common terminal COM, J5-2 Pin 2 of J5-2 is connected to pin 2 of J9-1 and pin 2 of J11-1, pin 5 of J5-2 is connected to pin 6 of J14-1, pin 6, pin 5, pin 4 and pin 3 of J13-1 are connected to pin 3, pin 2, pin 1 and pin 4 of IC6 respectively, pin 2 and pin 1 of J13-1 are connected to pin 3 and pin 1 of J5-2 respectively, pin 5, pin 4 and pin 3 of J15-1 are connected to pin 40, pin 9 and pin 10 of IC6 respectively, pin 2 and pin 1 of J15-1 are connected to pin 3 and pin 1 of J5-2 respectively, and all common terminals are connected to COM.

[0273] like Figures 5a to 5d As shown, the metering module includes: a connector ( Figure 5a )、Metering current signal processing unit ( Figure 5b )、Metering voltage signal processing unit ( Figure 5c ), metering processing unit ( Figure 5d ).

[0274] 1. Components:

[0275] Connectors: socket J3-1, plugs J4-2, J9-2, J10-2;

[0276] Measuring current signal processing unit: resistors R24, R25, R26, R27, R28, R29, R30, R31, R32, R33, R34, R35, capacitors C22, C23, C24, C25, C26, C27;

[0277] Metering voltage signal processing unit: resistors R36, R37, R38, R39, R40, R41, R42, R43, R44, R45, R46, R47, R48, R49, R50, R51, R52, R53, R54, R55, R56, R57, R58, R59, R110, R111, R112, R113, R114, R115, capacitors C28, C29, C30, C31, C32, C33, transformers T2, T3, T4;

[0278] Measuring processing unit: resistors R93, R94, R95, R96, R97, R98, R109, capacitors C50, C51, C52, C53, C54, C55, C56, C57, C58, C59, C60, C61, C62, C63, C64, C70, COMS tube Q5, measuring processing chip IC10;

[0279] 2. Component parameters / models:

[0280] Connectors: J3-1 uses a 6-core single-row side-lying patch socket with a terminal pitch of 1.27mm. Plug J4-2 uses a 4-core single-row straight plug with a terminal pitch of 2.54mm. J9-2 uses a 5-core single-row straight plug with a terminal pitch of 1.27mm. J10-2 uses a 4-core single-row straight plug with a terminal pitch of 1.27mm.

[0281] Measuring current signal processing unit: resistors R24, R25, R26, R27, R28, and R29 use a resistance of 1Ω and an accuracy of 1%; resistors R30, R31, R32, R33, R34, and R35 use a resistance of 1.2KΩ; capacitors C22, C23, C24, C25, C26, and C27 use 33nF / 25V;

[0282] Metering voltage signal processing unit: Resistors R36, R37, R38, R39, R40, R41, R42, R43, R44, R45, R46, R47, R48, R49, R50, R51, R52, and R53 use a resistance of 33KΩ; resistors R54, R55, R56, R57, R58, and R59 use a resistance of 51Ω and an accuracy of 1%; resistors R110, R111, R112, R113, R114, and R115 use a resistance of 1.2KΩ; capacitors C28, C29, C30, C31, C32, and C33 use 33nF / 25V; transformers T2, T3, and T4 use a current transformation ratio of 1:1;

[0283] Metering processing unit: Resistors R93, R94, R95, and R96 use 10Ω resistance, resistors R97, R98, and R109 use 10KΩ resistance, capacitors C50 and C52 use 4.7μF / 16V electrolytic capacitors, capacitors C51, C53, C54, C55, C62, C63, and C64 use 0.1μF / 25V, capacitors C56 and C57 use 20pF / 25V, capacitors C58, C59, C60, and C61 use 10pF / 25V, capacitor C70 uses a 10μF / 16V electrolytic capacitor, COMS tube Q5 uses BSS138, and metering processing chip IC10 uses ATT7022EU;

[0284] 3. Connection between components:

[0285] Connections between connectors and modules: J3-1 is connected to the power module J3-2, J4-2 is connected to the power module J4-1, J9-2 is connected to the main control module J9-1, and J10-2 is connected to the main control module J10-1;

[0286] Measuring current signal processing unit: The connection between the components of the A-phase current-voltage conversion circuit: one pin of R24 and R30 is connected to pin 6 of J3-1, one pin of R25 and R31 is connected to pin 5 of J3-1, the other pin of R24 and R25 is connected to one pin of C22 and C23, and connected to the common terminal COM, the other pin of R30 and the other pin of C22 are connected to pin 3 of IC10, the other pin of R31 and the other pin of C23 are connected to pin 4 of IC10, and the current signal is converted into a voltage signal and then given to IC10; the connection between the components of the B-phase current-voltage conversion circuit: one pin of R26 and R32 is connected to pin 4 of J3-1, one pin of R27 and R33 is connected to pin 3 of J3-1, the other pin of R26 and R27 is connected to C24 and C The first pin of R25 is connected to pin 2 of J3-1, the second pin of R29 is connected to pin 1 of J3-1, the third pin of R29 is connected to pin 2 of J3-1, the fourth pin of R28 is connected to pin 2 of J3-1, the fifth pin of R29 is connected to pin 2 of J3-1, the fifth pin of R29 is connected to pin 2 of J3-1, the sixth pin of R29 is connected to pin 2 of J3-1, the sixth pin of R29 is connected to pin 2 of J3-1, the eighth ...

[0287] Metering voltage signal processing unit: Connection between the components of the A-phase voltage sampling circuit. After R36, R37, and R38 are connected in series, the other leg of R36 is connected to leg 4 of J4-2, and the other leg of R38 is connected to leg 1 of T2. After R39, R40, and R41 are connected in series, the other leg of R39 is connected to leg 1 of J4-2, and the other leg of R41 is connected to leg 2 of T2, converting the high voltage into a small current signal. T2 is a 1:1 current transformer. One leg of R54 and R110 is connected to leg 3 of T2, one leg of R55 and R111 is connected to leg 4 of T2, the other leg of R54 and R55 is connected to one leg of C28 and C29, and connected to the common terminal COM. The other leg of R110 and the other leg of C28 are connected to leg 13 of IC10, and the other leg of R111 and the other leg of C29 are connected to leg 14 of IC10. After converting the current signal into a voltage signal Give it to IC10; Connection between the components of the B-phase voltage sampling circuit: After R42, R43, and R44 are connected in series, the other leg of R42 is connected to pin 3 of J4-2, and the other leg of R44 is connected to pin 1 of T3. After R45, R46, and R47 are connected in series, the other leg of R45 is connected to pin 1 of J4-2, and the other leg of R47 is connected to pin 2 of T3, converting the high voltage into a small current signal. T3 is a 1:1 current transformer. One leg of R56 and R112 is connected to pin 3 of T3, one leg of R57 and R113 is connected to pin 4 of T3, the other leg of R56 and R57 is connected to one leg of C30 and one leg of C31, and connected to the common terminal COM. The other leg of R112 and the other leg of C30 are connected to pin 16 of IC10, and the other leg of R113 and the other leg of C31 are connected to pin 17 of IC10, converting the current signal into a voltage signal and giving it to IC10;

[0288] Connections between components in the C-phase voltage sampling circuit: After R48, R49, and R50 are connected in series, the other leg of R48 is connected to leg 2 of J4-2, and the other leg of R50 is connected to leg 1 of T4. After R51, R52, and R53 are connected in series, the other leg of R51 is connected to leg 1 of J4-2, and the other leg of R53 is connected to leg 2 of T4, converting the high voltage into a low current signal. T4 is a 1:1 current transformer. One leg of R58 and R114 is connected to leg 3 of T4, one leg of R59 and R115 is connected to leg 4 of T4, the other leg of R58 and R59 is connected to one leg of C32 and C33, and to the common terminal COM. The other leg of R114 and the other leg of C32 are connected to leg 19 of IC10, and the other leg of R115 and the other leg of C33 are connected to leg 20 of IC10, converting the current signal into a voltage signal and giving it to IC10.

[0289] Metering processing unit: Pin 3, 4, 6, 7, 9, 10, 13, 14, 16, 17, 19, and 20 of IC10 are connected to R30, R31, R32, R33, R34, R35, R110, R111, R112, R113, R114, and R115 respectively; Pin 8, 11, 15, 23, 24, 32, 33, and 44 of IC10 are connected to the common terminal COM; Pin 12, 18, 34, and 41 of IC10 are connected to Pin 2 of J9-2; Pin 11 and Pin 12 of IC10 are connected in parallel with C54, C55, C62, C63, C64 are connected in parallel between pins 33 and 34 of IC10, C50 and C51 are connected in parallel between pin 39 of IC10 and the common terminal COM, and the positive pole of C50 is connected to pin 39 of IC10, C52 and C53 are connected in parallel between pin 5 of IC10 and the common terminal COM, and the positive pole of C52 is connected to pin 5 of IC10, pin 1 of IC10 is connected to one pin of R97, the positive pole of C70, and pin 5 of J9-2, the other pin of R97 is connected to pin 2 of J9-2, the negative pole of C70 is connected to the common terminal COM, pin 2 of IC10 is connected to pin 4 of J9-2, and pin 42 of IC10 is connected to the common terminal COM. Connect to one pin of crystal oscillator XT2 and one pin of C57, the other pin of C57 is connected to the common terminal COM, pin 43 of IC10 is connected to one pin of crystal oscillator XT2 and one pin of C56, the other pin of C56 is connected to the common terminal COM, pin 35 of IC10 is connected to one pin of R93 and one pin of C61, the other pin of C61 is connected to the common terminal COM, the other pin of R93 is connected to pin 4 of J10-2, pin 36 of IC10 is connected to one pin of R94 and one pin of C60, the other pin of C60 is connected to the common terminal COM, the other pin of R94 is connected to pin 3 of J10-2, I Pin 37 of C10 is connected to one pin of R95 and one pin of C59. The other pin of C59 is connected to the common terminal COM. The other pin of R95 is connected to pin 2 of J10-2. Pin 38 of IC10 is connected to one pin of R96. The other pin of R96 is connected to pin 1 of J10-2 and one pin of C58. The other pin of C58 is connected to the common terminal COM. Pin 40 of IC10 is connected to one pin of R109 and the source of CMOS tube Q5. The other pin of R109 and the gate of CMOS tube Q5 are connected to pin 2 of J9-2. The drain of CMOS tube Q5 is connected to pin 3 of J9-2. All common terminals are connected to COM.

[0290] like Figure 6a 、 6b As shown, the display / interface module includes: a connector, a display unit ( Figure 6a )、Key unit( Figure 6b ).

[0291] 1. Components:

[0292] Connector: Connect plugs J11-2, J12-2;

[0293] Display unit: OLD liquid crystal display module LCM;

[0294] Key unit: keys K1, K2, K3, K4;

[0295] 2. Component parameters / models:

[0296] Connector: J11-2 uses a 4-core single-row straight pin plug with a terminal spacing of 2.54mm, and J12-2 uses a 4-core single-row straight pin plug with a terminal spacing of 2.54mm;

[0297] Display unit: OLD liquid crystal display module LCM uses JLX12864OLD-096-I 2 C;

[0298] Key unit: Keys K1, K2, K3, and K4 use 6×6×5 direct-insert micro switches;

[0299] 3. Connection between components:

[0300] Connections between connectors and modules: J11-2 is connected to the main control module J11-1, and J12-2 is connected to the main control module J12-1;

[0301] Display unit: Connect pins 1, 2, 3, and 4 of LCM to pins 1, 2, 3, and 4 of J11-2 respectively;

[0302] Key unit: One end of K1, K2, K3, and K4 are connected to pins 4, 3, 2, and 1 of J12-2 respectively, and the other end of K1, K2, K3, and K4 are connected to pin 1 of J11-2. When the circuit breaker is working normally, press K1 to enter the key interrupt handler. K2 is the plus 1 or down key, K3 is the minus 1 or up key, K1 is the confirmation key, and K4 is the return key. If no key is pressed after 20 seconds, it will automatically return to the initial display interface and display in a loop.

[0303] The working process of the above intelligent controller includes the circuit breaker fault detection process, the remote communication control process and the key display control process, wherein the circuit breaker fault detection process is as follows:

[0304] 1. Start by powering on;

[0305] 2. The intelligent controller is powered on and initialized, completing the configuration of the I / O ports and register functions of the MCU, clearing the metering data, enabling interrupts, and allocating memory addresses;

[0306] 3. The controller performs a self-test to determine whether the controller is faulty. If so, proceed to step 4; if not, proceed to step 5;

[0307] 4. Repair or replace the controller;

[0308] 5. Light up the green light-emitting diode LED1, and the controller works normally;

[0309] 6. Cycle and display the active power, reactive power, apparent power, active energy and reactive energy of each phase and the combined phase, the effective value of each phase current, effective value of each phase voltage, power factor, frequency and other parameters. The display time of each screen is the time to complete this step.

[0310] 7. Determine whether the circuit breaker is closed. If so, go to step 8; if not, go to step 6.

[0311] 8. Protection current data processing, the single chip will filter, linearize and convert the detected data, calculate the actual current value of the three phases A, B and C, find the maximum current value and the corresponding phase among the three phases, and write the maximum current value and the corresponding phase into E 2 In the address corresponding to PROM;

[0312] 9. Determine whether there is a short-circuit instantaneous fault, and compare the maximum current value with the set short-circuit instantaneous current value. If the maximum current value is greater than the set short-circuit instantaneous current value, execute step 10; otherwise, execute step 16;

[0313] 10. Light up the red LED2 and the yellow LED3;

[0314] 11. A tripping command is issued and the circuit breaker is disconnected;

[0315] 12. Set the instantaneous fault type bit to facilitate display or remote reading of the fault type;

[0316] 13. The single chip microcomputer reads the date and time of the instantaneous fault from the clock chip and writes it into the single chip microcomputer E 2 The address corresponding to the PROM is convenient for displaying or remotely reading the date and time when the instantaneous fault occurs;

[0317] 14. Display instantaneous fault information, including instantaneous fault type, instantaneous fault current value, fault phase, date and time of fault occurrence;

[0318] 15. Determine whether the transient fault has been eliminated. If so, return to step 3; otherwise, return to step 14;

[0319] 16. Determine whether there is a short circuit short delay fault, compare the maximum current value with the set short circuit short delay current value, if the maximum current value is greater than the set short circuit short delay current value, execute step 17, otherwise, execute step 24;

[0320] 17. Light up the red LED2 and the yellow LED3;

[0321] 18. Determine whether the short circuit short delay time has expired. If so, proceed to step 19; otherwise, proceed to step 24;

[0322] 19. A tripping command is issued and the circuit breaker is disconnected;

[0323] 20. Set the short delay fault type bit to facilitate display or remote reading of the fault type;

[0324] 21. The single chip microcomputer reads the date and time when the short delay fault occurs from the clock chip and writes it into the single chip microcomputer E 2 The address corresponding to the PROM is convenient for displaying or remotely reading the date and time when the short delay fault occurs;

[0325] 22. Display short-delay fault information, including short-delay fault type, short-delay fault current value, fault phase, date and time of fault occurrence;

[0326] 23. Determine whether the short delay fault is eliminated. If so, return to step 3; otherwise, return to step 22;

[0327] 24. Determine whether there is an overload long delay fault, compare the maximum current value with the set overload long delay current value, if the maximum current value is greater than the set overload long delay current value, execute step 25, otherwise, execute step 32;

[0328] 25. Light up the red LED2 and the yellow LED3;

[0329] 26. Determine whether the overload long delay time has expired. If so, proceed to step 27; otherwise, proceed to step 32;

[0330] 27. A tripping command is issued and the circuit breaker is disconnected;

[0331] 28. Set the long delay fault type bit to facilitate display or remote reading of the fault type;

[0332] 29. The single chip microcomputer reads the date and time when the long delay fault occurs from the clock chip and writes it into the single chip microcomputer E 2 The address corresponding to the PROM is convenient for displaying or remotely reading the date and time when the long-delay fault occurs;

[0333] 30. Display long-delay fault information, including long-delay fault type, long-delay fault current value, fault phase, date and time of fault occurrence;

[0334] 31. Determine whether the long delay fault is eliminated. If so, return to step 3; otherwise, return to step 30;

[0335] 32. Determine whether there is an overload alarm, and compare the maximum current value with the set overload alarm current value (I≥1.05I R ), if the maximum current value is greater than the set overload alarm current value, execute step 33; otherwise, execute step 36;

[0336] 33. Red LED2 is always on, yellow LED3 is always on;

[0337] 34. Set the overload alarm to facilitate inspection and display or remote reading of the overload type;

[0338] 35. The single chip microcomputer writes the date and time when the overload alarm occurs into the single chip microcomputer E 2 In the address corresponding to the PROM, it is convenient to check the display or remotely read the date and time when the overload alarm occurs, and execute step 40;

[0339] 36. Determine whether there is an overload warning, and compare the maximum current value with the set overload warning current value (0.8I R ≤I<1.05I R ) and, if the maximum current value is within the overload warning current value range, execute step 37; otherwise, execute step 40;

[0340] 37. Red LED2 flashes, yellow LED3 is always on;

[0341] 38. Set the overload pre-alarm position to facilitate inspection and display or remote reading of the overload type;

[0342] 39. The single chip microcomputer writes the date and time of the overload warning time into the single chip microcomputer E 2 In the address corresponding to the PROM, it is convenient to check the display or remotely read the date and time when the overload pre-alarm occurs, and execute step 40;

[0343] 40. The single-chip microcomputer reads the parameters of the metering chip, and reads out the active power, reactive power, apparent power, active energy and reactive energy of each phase and the combined phase, the effective value of each phase current, effective value of voltage, power factor, frequency and other parameters and writes them into the single-chip microcomputer E 2 The corresponding address of PROM is convenient for inspection, display or remote reading; find the maximum voltage value and the corresponding phase among the three phases, and write the maximum voltage value and the corresponding phase into E 2 Find the minimum voltage value and the corresponding phase in the three phases, and write the minimum voltage value and the corresponding phase into E 2 Calculate the unbalance of the three-phase voltage and write it into the address corresponding to PROM 2 In the address corresponding to PROM;

[0344] 41. Determine whether there is an overvoltage fault, compare the maximum voltage value with the set overvoltage value, if the maximum voltage value is greater than the set overvoltage value, execute step 42; otherwise, execute step 48;

[0345] 42. Determine whether the overvoltage delay time has expired. If so, proceed to step 43; otherwise, proceed to step 48;

[0346] 43. A tripping command is issued and the circuit breaker is disconnected;

[0347] 44. Set the overvoltage fault type bit to facilitate display or remote reading of the fault type;

[0348] 45. The single chip microcomputer writes the date and time when the overvoltage fault occurs into the single chip microcomputer E 2 The address corresponding to the PROM is convenient for checking and displaying or remotely reading the date and time when the overvoltage fault occurs;

[0349] 46. Display overvoltage fault information, including overvoltage fault type, overvoltage fault voltage value, fault phase, date and time of fault occurrence;

[0350] 47. Determine whether the overvoltage fault is eliminated. If so, return to step 3; otherwise, return to step 46;

[0351] 48. Determine whether there is an undervoltage fault, compare the minimum voltage value with the set undervoltage value, if the minimum voltage value is less than the set undervoltage value, execute step 49; otherwise, execute step 55;

[0352] 49. Determine whether the overvoltage delay time has expired. If so, proceed to step 50; otherwise, proceed to step 55;

[0353] 50. A tripping command is issued and the circuit breaker is disconnected;

[0354] 51. Set the undervoltage fault type bit to facilitate display or remote reading of the fault type;

[0355] 52. The MCU writes the date and time of the undervoltage fault into MCU E 2 The address corresponding to the PROM is convenient for displaying or remotely reading the date and time when the undervoltage fault occurs;

[0356] 53. Display undervoltage fault information, including undervoltage fault type, undervoltage fault voltage value, fault phase, date and time of fault occurrence;

[0357] 54. Determine whether the undervoltage fault is eliminated. If so, return to step 3; otherwise, return to step 53;

[0358] 55. Determine whether there is a phase loss fault by comparing the minimum voltage value with the set phase loss voltage value (generally the set single-phase voltage value is 70V). If the minimum voltage value is less than the set phase loss voltage value, execute step 56; otherwise, execute step 61.

[0359] 56. A tripping command is issued and the circuit breaker is disconnected;

[0360] 57. Set the phase failure fault type bit to facilitate display or remote reading of the fault type;

[0361] 58. The single-chip computer writes the date and time when the phase failure occurs into the single-chip computer E 2 The address corresponding to the PROM is convenient for displaying or remotely reading the date and time when the phase failure occurs;

[0362] 59. Display phase loss voltage fault information, including phase loss fault type, phase loss fault voltage value, fault phase, date and time of fault occurrence;

[0363] 60. Determine whether the phase failure fault is eliminated. If so, return to step 3; otherwise, return to step 59;

[0364] 61. Determine whether there is a zero-break fault. Compare the three-phase voltage imbalance with the zero-break imbalance value (generally set to 15%). If the three-phase voltage imbalance value is greater than the set zero-break imbalance value, execute step 62; otherwise, return to step 3.

[0365] 62. A tripping command is issued and the circuit breaker is disconnected;

[0366] 63. Set the zero-break fault type bit to facilitate display or remote reading of the fault type;

[0367] 64. The single chip computer writes the date and time when the zero failure occurs into the single chip computer E 2 The address corresponding to the PROM is convenient for displaying or remotely reading the date and time when the zero failure occurs;

[0368] 65. Display zero failure information, including zero failure type, zero failure three-phase voltage imbalance value, date and time of failure occurrence;

[0369] 66. Determine whether the zero failure has been eliminated. If so, return to step 3; otherwise, return to step 65.

[0370] The remote communication control process is:

[0371] 1. Communication interruption entrance;

[0372] 2. Protect the scene and stack;

[0373] 3. Initialize the interrupt, configure the interrupt related registers, enable the sending and receiving interrupts, set the working mode, and set the baud rate;

[0374] 4. Determine whether the address is consistent. Compare the address of the circuit breaker with the address called by the host computer. If yes, go to step 5; otherwise, go to step 11.

[0375] 5. Determine the command classification, compare the received command with the command specified in the protocol, and determine whether the circuit breaker is receiving a command, sending a command, or an illegal command. If it is a sending command, execute step 6; if it is a receiving command, execute step 13; otherwise, execute step 11;

[0376] 6. Read the send flag status of the register to check whether the transmission is ready. If yes, go to step 7; otherwise, go to step 11.

[0377] 7. Send data;

[0378] 8. Determine whether the sending is completed. If so, go to step 9; otherwise, return to step 7;

[0379] 9. Determine whether the sending is correct. If so, go to step 11; otherwise, go to step 10.

[0380] 10. Return ERR error to the host computer;

[0381] 11. Restore the scene and exit the stack;

[0382] 12. Interrupt return;

[0383] 13. Check whether the reception is ready by reading the reception flag status of the register. If yes, go to step 14; otherwise, go to step 11.

[0384] 14. Receive data;

[0385] 15. Determine whether the reception is completed. If so, go to step 16; otherwise, return to step 14;

[0386] 16. Determine whether the reception is correct. If so, go to step 17; otherwise, go to step 18.

[0387] 17. Return the received data to the host computer;

[0388] 11. Restore the scene and exit the stack;

[0389] 12. Interrupt return;

[0390] 18. Return ERR error to the host computer;

[0391] 11. Restore the scene and exit the stack;

[0392] 12. Interrupt return.

[0393] The key display control process is:

[0394] 1. Key interrupt entry;

[0395] 2. Protect the scene and stack;

[0396] 3. Interrupt the initialization;

[0397] 4. Delay 2s;

[0398] 5. Determine whether a key is pressed; if so, go to step 6; otherwise, go to step 9;

[0399] 6. Key processing: perform corresponding processing according to the functions or combinations corresponding to different keys;

[0400] 7. Display the content corresponding to the button;

[0401] 8. Determine whether to return to the initial interface. If so, go to step 9; otherwise, return to step 6;

[0402] 9. Restore the scene and exit the stack;

[0403] 10. Interrupt return.

[0404] In summary, this solution realizes the intelligent protection and real-time monitoring of low-voltage circuit breakers and the centralized management of the power distribution system. It can measure the active power, reactive power, apparent power, active energy and reactive energy of each phase and the combined phase. At the same time, it can also measure the effective value of current, effective value of voltage, power factor, frequency and other parameters of each phase, fully meeting the needs of three-phase multi-rate multi-function electric energy meter. It can display the active power, reactive power, apparent power, active energy and reactive energy of each phase and the combined phase, the effective value of current, effective value of voltage, power factor, frequency and other parameters of each phase and the combined phase on site, and display fault information. It can remotely read the active power, reactive power, apparent power, active energy and reactive energy of each phase and the combined phase, the effective value of current, effective value of voltage, power factor, frequency and other parameters of each phase and the combined phase, as well as fault information. It can also inspect various parameters, fault information and parameter changes on site and remotely. The utility model adopts a modular design and includes a signal acquisition module, a power module, a metering module, a main control module, and a display / button module. The signal acquisition module is connected to the low-voltage circuit breaker, the power module, the metering module, the main control module, and the display / button module. The metering module is connected to the power module and the main control module. The main control module is connected to the signal acquisition module, the power module, the metering module, and the display / button module. The display / button module is connected to the power module and the main control module. In addition to the three-stage protection of the circuit breaker (long delay protection, short delay protection, and instantaneous protection), this utility model adds overvoltage protection, undervoltage protection, phase loss protection, zero-break protection, communication functions, energy metering, and an LCD display. It is equipped with a rechargeable lithium battery and can display or remotely read data after a power outage. It has the advantages of strong versatility, high reliability, and economical practicality.

[0405] Compared with the existing circuit breaker controller, this solution has the following advantages:

[0406] 1. Existing products only have current protection functions (overload long-delay protection, short-delay protection, instantaneous protection). The utility model can not only realize the current protection function, but also realize the voltage protection function (overvoltage protection, undervoltage protection, phase loss protection, zero break protection);

[0407] 2. The parameters of existing products can only be adjusted on-site using coding switches. The utility model can adjust the parameters on-site or remotely.

[0408] 3. Existing products have no metering function, but this utility model has a metering function;

[0409] 4. Existing products do not have on-site display function, but this utility model has on-site display function;

[0410] 5. Existing products cannot record the date and specific time when the fault or alarm occurs. The utility model can record the date and specific time when the fault or alarm occurs, and can also save 10 pieces of information about various faults that have occurred recently;

[0411] 6. Existing products can only monitor the power grid on site, while the utility model can monitor the power grid both on site and remotely;

[0412] 7. The parameter setting value of existing products can only be a multiple of the specified value, that is, it is not continuous. The parameter setting value of the utility model can be set as a multiple of the specified value or in steps of "1";

[0413] 8. Existing products cannot read the loop current value on site. The utility model can display or read the loop current value on site, as well as the voltage value, power, electric energy, and power factor. It can also read the loop current value, voltage value, power, electric energy, and power factor remotely on site.

[0414] 9. Existing products cannot read loop fault parameters on site. This utility model can read loop fault parameters on site and remotely.

[0415] 10. When distributing power in the power grid, existing products can only cut off the circuit on site, while the utility model can cut off the circuit remotely;

[0416] 11. After power failure, the utility model automatically switches to lithium battery power supply, and can still display fault information and read required parameters through remote communication;

[0417] 12. This utility model adopts modular design and is a universal low-voltage circuit breaker intelligent controller with strong versatility, high reliability, economy and practicality.

Claims

1. An intelligent controller suitable for general low-voltage circuit breakers, characterized in that: It includes a signal acquisition module, a power module, a metering module, a main control module, and a display / button module. The signal acquisition module is respectively connected to the low-voltage circuit breaker, the power module, the main control module, and the metering module. The power module is also respectively connected to the metering module, the main control module, and the display / button module. The metering module and the display / button module are respectively connected to the main control module.

2. The intelligent controller suitable for a universal low-voltage circuit breaker according to claim 1, characterized in that: The signal acquisition module is provided with a voltage acquisition circuit, a metering current acquisition circuit and a protection current acquisition circuit. The input ends of the voltage acquisition circuit, the metering current acquisition circuit and the protection current acquisition circuit are respectively connected to the low-voltage circuit breaker, and the output ends of the voltage acquisition circuit and the metering current acquisition circuit are respectively connected to the metering module, and the output end of the protection current acquisition circuit is connected to the main control module.

3. The intelligent controller suitable for a general low-voltage circuit breaker according to claim 2, characterized in that: The voltage collection circuit includes three voltage collection connecting wires UA, UB, UC, and a plug J1-2; The protection current collection circuit includes six protection current collection connecting wires CTA1, CTA2, CTB1, CTB2, CTC1, CTC2, A current mutual inductor CTA, B current mutual inductor CTB, C current mutual inductor CTC, and plug J2-2; The metering current acquisition circuit includes six metering current acquisition connecting wires CTAJ1, CTAJ2, CTBJ1, CTBJ2, CTCJ1, CTCJ2, A current mutual inductor CTAJ, B current mutual inductor CTBJ, C current mutual inductor CTCJ, and plug J3-2.

4. The intelligent controller suitable for a universal low-voltage circuit breaker according to claim 3, characterized in that: One end of the voltage collection connecting wire UA is connected to phase A on the incoming line side of the circuit breaker, and the other end is connected to pin 3 of plug J1-2. One end of the voltage collection connecting wire UB is connected to phase B on the incoming line side of the circuit breaker, and the other end is connected to pin 2 of plug J1-2. One end of the voltage collection connecting wire UC is connected to phase C on the incoming line side of the circuit breaker, and the other end is connected to pin 1 of plug J1-2. Plug J1-2 is connected to the power module; One end of the protection current collection connecting wire CTA1 is connected to one pin of the A current mutual inductor CTA installed on the outgoing line side of the circuit breaker, and the other end is connected to the 6th pin of the plug J2-2. One end of the protection current collection connecting wire CTA2 is connected to the other pin of the A current mutual inductor CTA installed on the outgoing line side of the circuit breaker, and the other end is connected to the 5th pin of the plug J2-2. One end of the protection current collection connecting wire CTB is connected to one pin of the B current mutual inductor CTB installed on the outgoing line side of the circuit breaker, and the other end is connected to the 4th pin of the plug J2-2. One end of the connecting wire CTB2 is connected to the other pin of the B current transformer CTB installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 3 of the plug J2-2. One end of the protective current collection connecting wire CTC1 is connected to one pin of the C current transformer CTC installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 2 of the plug J2-2. One end of the protective current collection connecting wire CTC2 is connected to the other pin of the C current transformer CTC installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 1 of the plug J2-2. The plug J2-2 is connected to the main control module. One end of the metering current collection connecting wire CTAJ1 is connected to one pin of the A current mutual inductor CTAJ installed on the outgoing line side of the circuit breaker, and the other end is connected to the 6th pin of the plug J3-2. One end of the metering current collection connecting wire CTAJ2 is connected to the other pin of the A current mutual inductor CTAJ installed on the outgoing line side of the circuit breaker, and the other end is connected to the 5th pin of the plug J3-2. One end of the metering current collection connecting wire CTBJ1 is connected to one pin of the B current mutual inductor CTBJ installed on the outgoing line side of the circuit breaker, and the other end is connected to the 4th pin of the plug J3-2. One end of the connecting wire CTBJ2 is connected to the other pin of the B current transformer CTBJ installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 3 of the plug J3-2. One end of the metering current collection connecting wire CTCJ1 is connected to one pin of the C current transformer CTCJ installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 2 of the plug J3-2. One end of the metering current collection connecting wire CTCJ2 is connected to the other pin of the C current transformer CTCJ installed on the outgoing line side of the circuit breaker, and the other end is connected to pin 1 of the plug J3-2. The plug J3-2 is connected to the metering module.

5. The intelligent controller applicable to a universal low-voltage circuit breaker according to claim 4, characterized in that: The power module includes a surge protection circuit, a 12V switching voltage regulator circuit, a 5V voltage regulator circuit, a lithium battery automatic charging circuit, an automatic switching circuit, a 5V boost voltage regulator circuit, a 3.3V voltage regulator circuit, a power supply side ground terminal, a system side common terminal and a first connector unit, and the first connector unit includes sockets J1-1, J4-1, and J5-1; The surge protection circuit includes varistors RV1, RV2, and RV3; The 12V switching voltage stabilizing circuit includes resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, capacitors C1, C2, C3, C4, C5, C6, C7, C8, C9, C69, a rectifier bridge B1, diodes D1, D2, D4, D5, D6, a transformer T1, an integrated circuit IC1, and a CMOS tube Q1; The 5V voltage stabilizing circuit includes a diode D13, capacitors C72, C10, C11, C12, and an integrated circuit IC2; The lithium battery automatic charging circuit includes a resistor R16, a capacitor C13, an integrated circuit IC3, and a socket J7-1; The automatic switching circuit includes a resistor R17, capacitors C14 and C15, a diode D7, and a CMOS tube Q2; The 5V boost voltage stabilization circuit includes resistors R19, R20, capacitors C16, C17, inductor L2, diode D8, CMOS tube Q3, and integrated circuit IC4; The 3.3V voltage stabilizing circuit includes resistors R21, R22, R23, capacitors C18, C19, C20, C21, inductor L3, and integrated circuit IC5; The power supply side ground terminal GND and the system side common terminal COM are connected via a capacitor C71.

6. The intelligent controller applicable to a universal low-voltage circuit breaker according to claim 5, characterized in that: The socket J1-1 is connected to the signal acquisition module, the socket J4-1 is connected to the metering module, the socket J5-1 is connected to the main control module, the socket J7-1 is connected to the lithium battery, and the pin 1 of J4-1 is connected to the pin 5 of J5-1; In the surge protection circuit, one pin of the varistor RV1 is connected to pin 3 of the socket J1-1, pin 4 of the socket J4-1, and one pin of the resistor R1; the other pin of the varistor RV1 is connected to pin 1 of the socket J4-1 and pin 2 of the rectifier bridge B1; one pin of the varistor RV2 is connected to pin 2 of the socket J1-1 and pin 3 of the socket J4-1; the other pin of the varistor RV2 is connected to pin 1 of the socket J4-1; one pin of the varistor RV3 is connected to pin 1 of the socket J1-1 and pin 2 of the socket J4-1; and the other pin of the varistor RV3 is connected to pin 1 of the socket J4-1; In the 12V switching voltage regulator circuit, one foot of the resistor R1 is connected to one foot of the varistor RV1 and pin 3 of the socket J1-1, the other foot of the resistor R1 is connected to pin 1 of the rectifier bridge B1, pin 2 of the rectifier bridge B1 is connected to pin 1 of the socket J4-1 and pin 5 of the socket J5-1, pin 3 of the rectifier bridge B1 is connected to the ground terminal GND on the power supply side, the positive electrode of the starting capacitor C1 is connected to pin 4 of the rectifier bridge B1, and the negative electrode is connected to the ground terminal GND on the power supply side. After the resistors R2, R3, and R4 are connected in series, the other foot of the resistor R2 is connected to pin 4 of the rectifier bridge B1 and the positive electrode of the capacitor C1, and the other foot of the resistor R4 is connected to pin 7 of the integrated circuit IC1 to provide an initial starting voltage for the integrated circuit IC1. Pin 1 of the transformer T1 is connected to the rectifier Pin 4 of bridge B1 is connected, and after resistor R5 and capacitor C2 are connected in parallel, one end is connected to pin 1 of transformer T1, and the other end is connected to the negative electrode of diode D1. The positive electrode of diode D1 is connected to pin 2 of transformer T1. Resistor R5, capacitor C2, and diode D1 form a discharge circuit. Capacitor C3 and capacitor C4 are connected in parallel. One end of the positive electrode of capacitor C4 is connected to pin 7 of integrated circuit IC1 and the negative electrode of diode D2, and the other end is connected to the ground terminal GND on the power supply side. The positive electrode of diode D2 is connected to one pin of resistor R6, and the other pin of resistor R6 is connected to pin 5 of transformer T1. Pin 6 of transformer T1 is connected to the ground terminal GND on the power supply side. Capacitor C3, capacitor C4, diode D2, resistor R6, and transformer T1 are integrated circuit IC1. Providing working voltage, after resistors R7 and R8 are connected in series, the other leg of resistor R7 is connected to pin 7 of integrated circuit IC1, and the other leg of resistor R8 is connected to the ground terminal GND on the power supply side. After resistor R9 and capacitor C6 are connected in parallel, one end is connected to pin 1 of integrated circuit IC1, and the other end is connected to pin 2 of integrated circuit IC1, resistor R7, and resistor R8, which plays the role of regulating voltage. Pin 3 of integrated circuit IC1 is connected to capacitor C8 and one leg of resistor R11, and the other leg of capacitor C8 is connected to the ground terminal GND on the power supply side. The other leg of resistor R11 is connected to the source of CMOS tube Q1 and one leg of resistor R12, and the other leg of resistor R12 is connected to the ground terminal GND on the power supply side. Resistors R11, R12, and capacitor C8 forms a current detection network. Pin 4 of the integrated circuit IC1 is connected to the resistor R10 and one pin of the capacitor C7. The other pin of the capacitor C7 is connected to the power supply side ground terminal GND. The other pin of the resistor R10 is connected to the pin 8 of the integrated circuit IC1. The resistor R10 and the capacitor C7 adjust the oscillation frequency and maximum duty cycle of the integrated circuit IC1. Pin 5 of the integrated circuit IC1 is connected to the power supply side ground terminal GND. Pin 6 of the integrated circuit IC1 is connected to the cathode of the diode D4 and one pin of the resistor R13. The anode of the diode D4 is connected to the power supply side ground terminal GND. The other pin of the resistor R13 is connected to the gate of the CMOS tube Q1 and one pin of the resistor R14. The other pin of the resistor R14 is connected to the power supply side ground terminal GND.The drain of CMOS tube Q1 is connected to pin 2 of transformer T1 and one pin of capacitor C69. The other pin of capacitor C69 is connected to the anode of diode D5 and one pin of resistor R15. The cathode of diode D5 and the other pin of resistor R15 are connected to the power supply side ground terminal GND. Capacitor C69, diode D5, and resistor R15 protect CMOS tube Q1. The anode of diode D6 is connected to pin 3 of transformer T1. The cathode of diode D6 is connected to the anode of capacitor C9 and pin 4 of socket J5-1, providing 12VDC power to the system. The other pin of capacitor C9 and pin 4 of transformer T1 are connected to the system side common terminal COM. In the 5V voltage stabilizing circuit, the anode of diode D13 is connected to the cathode of diode D6 and pin 4 of socket J5-1, and the cathode of diode D13 is connected to pins 1 and 3 of integrated circuit IC2. Diode D13 plays a protective role. When the polarity of the external auxiliary power supply 12VDC is reversed, diode D13 is cut off and cannot provide power to the control. After capacitors C72 and C10 are connected in parallel, the positive terminal of capacitor C72 is connected to pins 1 and 3 of integrated circuit IC2, the negative terminal of capacitor C72 is connected to the system-side common terminal COM, pin 2 of integrated circuit IC2 is connected to the system-side common terminal COM, one pin of capacitor C11 is connected to pin 4 of integrated circuit IC2, and the other pin is connected to pin 5 of integrated circuit IC2, pin 5 of integrated circuit IC2 is connected to the positive electrode of capacitor C12, and the other pin of capacitor C12 is connected to the system-side common terminal COM; In the lithium battery automatic charging circuit, pins 1 and 2 of the integrated circuit IC3 are connected to the system-side common terminal COM, pin 5 of the integrated circuit IC3 is connected to the system-side common terminal COM through a resistor R16, pin 4 of the integrated circuit IC3 is connected to pin 5 of the integrated circuit IC2, pin 3 of the integrated circuit IC3 is connected to one pin of the capacitor C13, pin 2 of the socket J7-1, and the drain of the CMOS tube Q2, the other pin of the capacitor C13, pin 1 of the socket J7-1 are connected to the system-side common terminal COM, pin 2 of the socket J7-1 is connected to the positive electrode of the lithium battery, and pin 1 of the socket J7-1 is connected to the negative electrode of the lithium battery; In the automatic switching circuit, the gate of the CMOS tube Q2 is connected to pin 5 of the integrated circuit IC2, one pin of the resistor R17, and the positive electrode of the diode D7. The other pin of the resistor R17 is connected to the system-side common terminal COM. The drain of the CMOS tube Q2 is connected to pin 3 of the integrated circuit IC3. The source of the CMOS tube Q2 is connected to the negative electrode of the diode D7, the positive electrode of the capacitor C14, and one pin of the capacitor C15. The negative electrode of the capacitor C14 and the other pin of the capacitor C15 are connected to the system-side common terminal COM. When the system is powered, the CMOS tube Q2 is turned off. When the system cannot be powered, the CMOS tube Q2 is turned on and powered by the lithium battery, ensuring that the control can work normally during a power outage. In the 5V boost voltage stabilization circuit, one pin of the inductor L2 is connected to the source of the CMOS transistor Q2, the other pin of the inductor L2 is connected to the anode of the diode D8 and the drain of the CMOS transistor Q3, the gate of the CMOS transistor Q3 is connected to pin 5 of the integrated circuit IC4, the cathode of the diode D8 is connected to one pin of the resistor R19, the anode of the capacitor C16, one pin of the capacitor C17, and pin 3 of the socket J5-1, providing a 5VDC power supply, the other pin of the resistor R19 is connected to pin 5 of the integrated circuit IC4, one pin of the resistor R20, the other pin of the resistor R20, the cathode of the capacitor C16, the other pin of the capacitor C17, and pin 4 of the integrated circuit IC4 are connected to the system-side common terminal COM, and pins 2 and 3 of the integrated circuit IC4 are connected to the source of the CMOS transistor Q2. When powered by the system, a stable 5V power supply is maintained. When powered by a lithium battery, this circuit boosts the lithium battery voltage to 5V while still maintaining a stable 5V power supply. In the 3.3V voltage regulator circuit, pins 1 and 4 of the integrated circuit IC5 are connected to the cathode of the diode D8 and one pin of the capacitor C18; the other pin of the capacitor C18 and pin 2 of the integrated circuit IC5 are connected to the system-side common terminal COM; pin 3 of the integrated circuit IC5 is connected to one pin of the inductor L3; the other pin of the inductor L3 is connected to one pin of the resistor R21, one pin of the capacitor C19, the positive electrode of the capacitor C20, one pin of the capacitor C21, one pin of the resistor R23, and pin 2 of the socket J5-1 to provide a 3.3VDC power supply; the other pin of the resistor R21 is connected to the other pin of the capacitor C19, one pin of the resistor R22, and pin 5 of the integrated circuit IC5; the other pin of the resistor R22, the negative electrode of the capacitor C20, the other pin of the capacitor C21, and the other pin of the resistor R23 are connected to the system-side common terminal COM; Pins 4, 3, and 2 of the socket J4-1 are connected to pins 3, 2, and 1 of the socket J1-1, respectively, and pin 1 of J4-1 is connected to pin 5 of J5-1. Pin 5 of the socket J5-1 is connected to the main control module, pin 4 of J5-1 is connected to the cathode of diode D6 to provide 12VDC power supply, pin 3 of J5-1 is connected to the cathode of diode D8 to provide 5VDC power supply, pin 2 of J5-1 is connected to one pin of inductor L3 to provide 3.3VDC power supply, and pin 1 of J5-1 is connected to the common terminal COM on the system side.

7. The intelligent controller applicable to a universal low-voltage circuit breaker according to claim 6, characterized in that: The main control module includes a second connector unit, an A-phase processing unit, a B-phase processing unit, a C-phase processing unit, a trip control circuit, an operation status indication circuit, a communication interface circuit, a level conversion circuit, an opening and closing status detection circuit, a clock circuit and a microprocessor control circuit; The second connector unit includes sockets J2-1, J6-1, J8-1, J9-1, J10-1, J11-1, J12-1, J13-1, J14-1, J15-1 and a plug J5-2; The A-phase processing unit includes a rectifier bridge B2, resistors R60, R63, R66, R69, R72, capacitors C34, C37, C38, and an amplifier IC9-A, which are used to realize A-phase current rectification, current-voltage conversion, filtering, and amplification processing; The B-phase processing unit includes a rectifier bridge B3, resistors R61, R64, R67, R70, R73, capacitors C35, C39, and an amplifier IC9-B, which are used to realize B-phase current rectification, current-voltage conversion, filtering, and amplification processing; The C-phase processing unit includes a rectifier bridge B4, resistors R62, R65, R68, R71, R74, capacitors C36, C40, and an amplifier IC9-C, which are used to realize C-phase current rectification, current-voltage conversion, filtering, and amplification processing; The trip control circuit includes isolation diodes D9, D10, D12, a freewheeling diode D11, capacitors C65, C66, C67, resistors R100, R101, and a transistor Q4; The operating status indication circuit includes current limiting resistors R88, R87, R86, a green LED1, a red LED2, and a yellow LED3; The communication interface circuit includes pull-up resistors R79, R80, R81, resistors R77, R78, a transceiver chip IC7, and a capacitor C47; The level conversion circuit includes a resistor R106, capacitors C77, C78, and IC11; The opening and closing state detection circuit includes pull-up resistors R85 and J8-1; The clock circuit includes pull-up resistors R82, R83, R84, capacitors C48, C49, a crystal oscillator XT3, and IC8; The microprocessor control circuit includes pull-up resistors R75, R76, R102, R103, R104, R105, R89, R90, R91, R92, R108, capacitors C41, C42, C43, C44, C45, C46, C73, C74, a crystal oscillator XT1, an inductor L1, and a chip IC6.

8. The intelligent controller applicable to a universal low-voltage circuit breaker according to claim 7, characterized in that: In the second connector unit, socket J2-1 is connected to plug J2-2 of the signal acquisition module, plug J5-2 is connected to socket J5-1 of the power module, socket J6-1 is connected to plug J6-2 of the trip actuator installed on the circuit breaker, socket J8-1 is connected to the auxiliary normally open contact installed on the circuit breaker, and is used to determine the closing and opening status of the circuit breaker, sockets J9-1 and J10-1 are respectively connected to the metering module, sockets J11-1 and J12-1 are respectively connected to the display / key module, socket J13-1 is the program download interface, socket J14-1 is the user end interface, and socket J15-1 is the handheld programmer interface; In the A-phase processing unit, pin 1 of the rectifier bridge B2 is connected to pin 6 of the socket J2-1, pin 2 of the rectifier bridge B2 is connected to pin 5 of the socket J2-1, one pin of the resistors R60 and R63 is connected to pin 4 of the rectifier bridge B2, the other pin of the resistor R60 and pin 3 of the rectifier bridge B2 are connected to the common terminal COM, the other pin of the resistor R63 is connected to the resistor R66 and one pin of the capacitor C34, the other pin of the capacitor C34 and one pin of the resistor R69 are connected to the common terminal COM, the other pin of the resistor R66 and one pin of the resistor R72 are connected to pin 2 of the amplifier IC9-A, the other pin of the resistor R69 is connected to pin 3 of the amplifier IC9-A, the other pin of the resistor R72 is connected to pin 1 of the amplifier IC9-A, one pin of the capacitor C38, and pin 37 of the chip IC6, the other pin of the capacitor C38 and one pin of the capacitor C37 are connected to the common terminal COM, and the other pin of the capacitor C37 is connected to pin 4 of the amplifier IC9-A and pin 3 of the plug J5-2; In the B-phase processing unit, pin 1 of the rectifier bridge B3 is connected to pin 4 of the socket J2-1, pin 2 of B3 is connected to pin 3 of the socket J2-1, resistor R61 and one pin of the resistor R64 are connected to pin 4 of the rectifier bridge B3, the other pin of the resistor R61 and pin 3 of the rectifier bridge B3 are connected to the common terminal COM, the other pin of the resistor R64 is connected to resistor R67 and one pin of the capacitor C35, the other pin of the capacitor C35 and one pin of the resistor R70 are connected to the common terminal COM, the other pin of the resistor R67 and one pin of the resistor R73 are connected to pin 5 of the amplifier IC9-B, the other pin of the resistor R70 is connected to pin 6 of the amplifier IC9-B, the other pin of the resistor R73 is connected to pin 7 of the amplifier IC9-B, one pin of the capacitor C39, and pin 36 of the chip IC6, and the other pin of the capacitor C39 is connected to the common terminal COM; In the capacitor C phase processing unit, pin 1 of the rectifier bridge B4 is connected to pin 2 of the socket J2-1, pin 2 of B4 is connected to pin 1 of the socket J2-1, resistor R62 and one pin of resistor R65 are connected to pin 4 of the rectifier bridge B4, the other pin of the resistor R62 and pin 3 of B4 are connected to the common terminal COM, the other pin of the resistor R65 is connected to resistor R68 and one pin of capacitor C36, the other pin of capacitor C36 and one pin of resistor R71 are connected to the common terminal COM, the other pin of resistor R68 and one pin of resistor R74 are connected to pin 9 of amplifier IC9-C, the other pin of resistor R71 is connected to pin 10 of amplifier IC9-C, the other pin of resistor R74 is connected to pin 8 of amplifier IC9-C, one pin of capacitor C40, and pin 35 of chip IC6, and the other pin of capacitor C40 is connected to the common terminal COM; In the trip control circuit, the positive electrode of capacitor C65, one pin of capacitor C66, and the positive electrode of D9 are connected to pin 4 of J5-2, the negative electrode of capacitor C65 and the other pin of capacitor C66 are connected to the common terminal COM, the negative electrode of D9 is connected to the negative electrode of D10, pin 2 of J6-1, and the negative electrode of D12, the positive electrode of D10 is connected to the negative electrode of D12, resistor R100, resistor R101, and pin 5 of J14-1, the positive electrode of D12 is connected to pin 11 of chip IC6, the other pin of resistor R100 is connected to the common terminal COM, the other pin of resistor R101 is connected to the base of transistor Q4 and one pin of capacitor C67, the other pin of capacitor C67 and the emitter of Q4 are connected to the common terminal COM, the collector of Q4 is connected to the positive electrode of D11 and pin 1 of socket J6-1, and socket J6-1 is connected to the trip actuator plug J6-2 installed on the circuit breaker; In the operating status indication circuit, one pin of the resistor R86, the resistor R87, and the resistor R88 is connected to the 3rd pin of the plug J5-2, and the other pins of the resistor R86, the resistor R87, and the resistor R88 are connected to the positive electrodes of LED1, LED2, and LED3 respectively, and the negative electrodes of LED1, LED2, and LED3 are connected to the 26th pin, the 25th pin, and the 24th pin of the chip IC6 respectively; In the communication interface circuit, pins 1, 4, 2, and 3 of the transceiver chip IC7 are respectively connected to the resistor R80, the resistor R79, one pin of the resistor R81, and the pins 9, 10, and 40 of the chip IC6, the resistors R79, R80, and R81 are connected to pin 3 of the plug J5-2, the pin 5 of the transceiver chip IC7 is connected to the common terminal COM, the pins 6 and 7 of the transceiver chip IC7 are respectively connected to one pin of the resistor R78 and the resistor R77, the other pins of the resistor R78 and the resistor R77 are respectively connected to pins 3 and 4 of the socket J14-1, the pin 8 of the transceiver chip IC7 is connected to pin 3 of the plug J5-2 and one pin of the capacitor C47, and the other pin of the capacitor C47 is connected to the common terminal COM; In the level conversion circuit, pin 2 of the chip IC11 is connected to one pin of the capacitor C77 and pin 2 of the plug J5-2, the other pin of the capacitor C77 is connected to the common terminal COM, pin 19 of the chip IC11 is connected to one pin of the capacitor C78 and pin 3 of the plug J5-2, the other pin of the capacitor C78 is connected to the common terminal COM, pin 10 of the chip IC11 is connected to one pin of the resistor R106, the other pin of the resistor R106 is connected to pin 2 of the plug J5-2, and pin 11 of the chip IC11 is connected to the common terminal COM. Pins 1, 3, 4, and 5 of IC11 are connected to pins 4, 2, 1, and 3 of socket J10-1 respectively. Pins 6 and 7 of chip IC11 are connected to pins 5 and 4 of socket J9-1 respectively. Pins 8 and 9 of chip IC11 are connected to pins 4 and 3 of socket J11-1 respectively. Pins 12, 13, 14, 15, 16, 17, 18, and 20 of chip IC11 are connected to pins 20, 19, 42, 41, 3, 2, 1, and 43 of chip IC6 respectively. In the opening and closing state detection circuit, one pin of the resistor R85 is connected to the 3rd pin of the plug J5-2, the other pin of the resistor R85 is connected to the 23rd pin of the chip IC6 and the 2nd pin of the socket J8-1, the 1st pin of the socket J8-1 is connected to the common terminal COM, and the socket J8-1 is connected to the auxiliary normally open contact installed on the circuit breaker, which is used to determine the closing and opening state of the circuit breaker; In the clock circuit, pins 1 and 8 of chip IC8 are connected to pin 3 of plug J5-2, pin 2 of chip IC8 is connected to one pin of crystal oscillator XT3 and one pin of capacitor C49, the other pin of capacitor C49 is connected to the common terminal COM, pin 3 of chip IC8 is connected to the other pin of crystal oscillator XT3 and one pin of capacitor C48, the other pin of capacitor C48 is connected to the common terminal COM, pin 4 of chip IC8 is connected to the common terminal COM, pin 5 of chip IC8 is connected to pin 22 of chip IC6 and one pin of resistor R84 to control the read and write operations of chip IC8, pins 6 and 7 of chip IC8 are connected to resistor R83, resistor R82, and pin 1 and pin 3 of chip IC6, respectively, and the other pins of resistors R82, resistor R83, and resistor R84 are connected to pin 3 of plug J5-2; In the microprocessor control circuit, one pin of the resistor R75 is connected to the 3rd pin of the plug J5-2, the other pin of the resistor R75 is connected to the positive electrode of the capacitor C41 and the 4th pin of the transceiver chip IC7, the negative electrode of the capacitor C41 is connected to the common terminal COM, and one pin of the resistor R76, the resistor R102, the resistor R103, the resistor R104, the resistor R105, the resistor R89, the resistor R90, the resistor R91, the resistor R92, and the resistor R108 is connected to the 3rd pin of the plug J5-2, and the resistor R76, the resistor R102, the resistor R103, the resistor R104, the resistor R105, the resistor R89, the resistor R90, and the resistor R91 , resistor R92, and one foot of resistor R108 are connected to pins 44, 43, 2, 19, 20, 12, 13, 14, 15, and 16 of chip IC6 respectively. Pin 7 of chip IC6 is connected to one foot of crystal oscillator XT1 and one foot of capacitor C46. The other foot of capacitor C46 is connected to the common terminal COM. Pin 8 of chip IC6 is connected to the other foot of crystal oscillator XT1 and one foot of capacitor C45. The other foot of capacitor C45 is connected to the common terminal COM. Pin 27 of chip IC6 is connected to one foot of inductor L1, one foot of capacitor C44, and pin 29 of chip IC6. The other foot of L1 One pin is connected to pin 3 of J5-2, the other pin of capacitor C44 is connected to the common terminal COM, pins 5, 17, and 38 of chip IC6 are connected to pin 3 of plug J5-2, pins 6, 18, and 39 of chip IC6 are connected to the common terminal COM, pin 16 of chip IC6 is connected to pin 3 of socket J9-1, pins 12, 13, 14, and 15 of chip IC6 are connected to pins 4, 3, 2, and 1 of socket J12-1 respectively, after capacitors C43, C42, C73, and C74 are connected in parallel, the positive end of capacitor C43 is connected to pin 3 of plug J5-2, and the negative end is connected to the common terminal CO M connection, pin 2 of plug J5-2 is connected to pin 2 of socket J9-1 and pin 2 of socket J11-1, pin 5 of plug J5-2 is connected to pin 6 of socket J14-1, pin 6, pin 5, pin 4 and pin 3 of socket J13-1 are connected to pin 3, pin 2, pin 1 and pin 4 of chip IC6 respectively, pin 2 and pin 1 of socket J13-1 are connected to pin 3 and pin 1 of plug J5-2 respectively, pin 5, pin 4 and pin 3 of socket J15-1 are connected to pin 40, pin 9 and pin 10 of chip IC6 respectively, pin 2 and pin 1 of socket J15-1 are connected to pin 3 and pin 1 of plug J5-2 respectively, and all common terminals are connected COM.

9. The intelligent controller applicable to a universal low-voltage circuit breaker according to claim 8, characterized in that: The metering module includes a third connector unit, a metering current signal processing unit, a metering voltage signal processing unit and a metering processing circuit. The third connector unit includes a socket J3-1 and plugs J4-2, J9-2 and J10-2. The metering current signal processing unit includes an A-phase current-voltage conversion circuit, a B-phase current-voltage conversion circuit, and a C-phase current-voltage conversion circuit. The A-phase current-voltage conversion circuit includes a resistor R24, a resistor R25, a resistor R30, a resistor R31, a capacitor C22, and a capacitor C23. The B-phase current-voltage conversion circuit includes a resistor R26, a resistor R27, a resistor R32, a resistor R33, a capacitor C24, and a capacitor C25. The C-phase current-voltage conversion circuit includes a resistor R28, a resistor R29, a resistor R34, a resistor R35, a capacitor C26, and a capacitor C27. The metering voltage signal processing unit includes a phase A voltage sampling circuit, a phase B voltage sampling circuit, and a phase C voltage sampling circuit. The phase A voltage sampling circuit includes resistors R36, R37, R38, R39, R40, R41, R54, R55, R110, R111, a transformer T2, a capacitor C28, and a capacitor C29. The B-phase voltage sampling circuit includes a resistor R42, a resistor R43, a resistor R44, a resistor R45, a resistor R46, a resistor R47, a resistor R56, a resistor R57, a resistor R112, a resistor R113, a transformer T3, a capacitor C30, and a capacitor C31; The C-phase voltage sampling circuit includes a resistor R48, a resistor R49, a resistor R50, a resistor R51, a resistor R52, a resistor R53, a resistor R58, a resistor R59, a resistor R114, a resistor R115, a transformer T4, a capacitor C32, and a capacitor C33; The measurement processing circuit includes a chip IC10, a resistor R93, a resistor R94, a resistor R95, a resistor R96, a resistor R97, a resistor R98, a resistor R109, a capacitor C50, a capacitor C51, a capacitor C52, a capacitor C53, a capacitor C54, a capacitor C55, a capacitor C56, a capacitor C57, a capacitor C58, a capacitor C59, a capacitor C60, a capacitor C61, a capacitor C62, a capacitor C63, a capacitor C64, a capacitor C70, and a CMOS tube Q5; In the third connector unit, the socket J3-1 is connected to the plug J3-2 of the signal acquisition module, the plug J4-2 is connected to the socket J4-1 of the power module, the plug J9-2 is connected to the socket J9-1 of the main control module, and the plug J10-2 is connected to the socket J10-1 of the main control module; In the A-phase current-voltage conversion circuit, one pin of the resistor R24 and the resistor R30 is connected to pin 6 of the socket J3-1, one pin of the resistor R25 and the resistor R31 is connected to pin 5 of the socket J3-1, the other pins of the resistor R24 and the resistor R25 are connected to one pin of the capacitor C22 and the capacitor C23, and are connected to the common terminal capacitor COM, the other pin of the resistor R30 and the other pin of the capacitor C22 are connected to pin 3 of the chip IC10, and the other pin of the resistor R31 and the other pin of the capacitor C23 are connected to pin 4 of the chip IC10, converting the current signal into a voltage signal and then providing it to the chip IC10; In the B-phase current-voltage conversion circuit, one pin of the resistor R26 and the resistor R32 is connected to pin 4 of the socket J3-1, one pin of the resistor R27 and the resistor R33 is connected to pin 3 of the socket J3-1, the other pins of the resistor R26 and the resistor R27 are connected to one pin of the capacitor C24 and the capacitor C25, and are connected to the common terminal capacitor COM, the other pin of the resistor R32 and the other pin of the capacitor C24 are connected to pin 6 of the chip IC10, and the other pin of the resistor R33 and the other pin of the capacitor C25 are connected to pin 7 of the chip IC10, so as to convert the current signal into a voltage signal and then provide it to the chip IC10; In the C-phase current-voltage conversion circuit, one pin of the resistor R28 and the resistor R34 is connected to pin 2 of the socket J3-1, one pin of the resistor R29 and the resistor R35 is connected to pin 1 of the socket J3-1, the other pins of the resistor R28 and the resistor R29 are connected to one pin of the capacitor C26 and the capacitor C27, and are connected to the common terminal capacitor COM, the other pin of the resistor R34 and the other pin of the capacitor C26 are connected to pin 9 of the chip IC10, and the other pin of the resistor R35 and the other pin of the capacitor C27 are connected to pin 10 of the chip IC10, converting the current signal into a voltage signal and then providing it to the chip IC10; In the A-phase voltage sampling circuit, after resistors R36, R37, and R38 are connected in series, the other leg of resistor R36 is connected to pin 4 of plug J4-2, and the other leg of resistor R38 is connected to pin 1 of transformer T2. After resistors R39, R40, and R41 are connected in series, the other leg of resistor R39 is connected to pin 1 of plug J4-2, and the other leg of resistor R41 is connected to pin 2 of transformer T2, converting high voltage into low current signal. Transformer T2 is a 1:1 current transformer. Resistors R54 and R1 One pin of 10 is connected to pin 3 of transformer T2, one pin of resistor R55 and resistor R111 is connected to pin 4 of transformer T2, the other pins of resistor R54 and resistor R55 are connected to one pin of capacitor C28 and capacitor C29, and connected to the common terminal capacitor COM, the other pin of resistor R110 and the other pin of capacitor C28 are connected to pin 13 of chip IC10, the other pin of resistor R111 and the other pin of capacitor C29 are connected to pin 14 of chip IC10, and the current signal is converted into a voltage signal and then given to chip IC10; In the B-phase voltage sampling circuit, after the resistors R42, R43, and R44 are connected in series, the other pin of the resistor R42 is connected to the 3rd pin of the plug J4-2, and the other pin of the resistor R44 is connected to the 1st pin of the transformer T3. After the resistors R45, R46, and R47 are connected in series, the other pin of the resistor R45 is connected to the 1st pin of the plug J4-2, and the other pin of the resistor R47 is connected to the 2nd pin of the transformer T3, converting the high voltage into a small current signal. The transformer T3 is a 1:1 current transformer. The resistors R56 and R1 One pin of 12 is connected to pin 3 of transformer T3, one pin of resistor R57 and resistor R113 is connected to pin 4 of transformer T3, the other pins of resistor R56 and resistor R57 are connected to one pin of capacitor C30 and capacitor C31, and connected to the common terminal capacitor COM, the other pin of resistor R112 and the other pin of capacitor C30 are connected to pin 16 of chip IC10, the other pin of resistor R113 and the other pin of capacitor C31 are connected to pin 17 of chip IC10, and the current signal is converted into a voltage signal and then given to chip IC10; In the C-phase voltage sampling circuit, after the resistors R48, R49, and R50 are connected in series, the other pin of the resistor R48 is connected to the 2nd pin of the plug J4-2, and the other pin of the resistor R50 is connected to the 1st pin of the transformer T4. After the resistors R51, R52, and R53 are connected in series, the other pin of the resistor R51 is connected to the 1st pin of the plug J4-2, and the other pin of the resistor R53 is connected to the 2nd pin of the transformer T4, converting the high voltage into a small current signal. The transformer T4 is a 1:1 current transformer. The resistors R58 and R1 One pin of 14 is connected to pin 3 of transformer T4, one pin of resistor R59 and resistor R115 is connected to pin 4 of transformer T4, the other pins of resistor R58 and resistor R59 are connected to one pin of capacitor C32 and capacitor C33, and connected to the common terminal capacitor COM, the other pin of resistor R114 and the other pin of capacitor C32 are connected to pin 19 of chip IC10, the other pin of resistor R115 and the other pin of capacitor C33 are connected to pin 20 of chip IC10, and the current signal is converted into a voltage signal and then given to chip IC10; In the metering processing circuit, pins 3, 4, 6, 7, 9, 10, 13, 14, 16, 17, 19, and 20 of the chip IC10 are connected to resistors R30, R31, R32, R33, R34, R35, R110, R111, R112, R113, R114, and R115, respectively; pins 8, 11, 15, 23, 24, 32, 33, and 44 of the chip IC10 are connected to the common capacitor COM; pins 12, 18, 34, and 41 of the chip IC10 are connected to pin 2 of the plug J9-2; and pins 11 and 12 of the chip IC10 are connected in parallel. Capacitor C54, capacitor C55, capacitor C62, capacitor C63, capacitor C64 are connected in parallel between pins 33 and 34 of chip IC10, capacitor C50 and capacitor C51 are connected in parallel between pin 39 of chip IC10 and common capacitor COM, and the positive electrode of capacitor C50 is connected to pin 39 of chip IC10, capacitor C52 and capacitor C53 are connected in parallel between pin 5 of chip IC10 and common capacitor COM, and the positive electrode of capacitor C52 is connected to pin 5 of chip IC10, pin 1 of chip IC10 is connected to one pin of resistor R97, the positive electrode of capacitor C70, and pin 5 of plug J9-2, the other pin of resistor R97 is connected to pin 2 of plug J9-2, the negative electrode of capacitor C70 is connected to the common capacitor COM, and the pin of chip IC10 is connected to the positive electrode of capacitor C70. Pin 2 is connected to pin 4 of plug J9-2, pin 42 of chip IC10 is connected to one pin of crystal oscillator XT2 and one pin of capacitor C57, the other pin of capacitor C57 is connected to the common terminal capacitor COM, pin 43 of chip IC10 is connected to one pin of crystal oscillator XT2 and one pin of capacitor C56, the other pin of capacitor C56 is connected to the common terminal capacitor COM, pin 35 of chip IC10 is connected to one pin of resistor R93 and one pin of capacitor C61, the other pin of capacitor C61 is connected to the common terminal capacitor COM, the other pin of resistor R93 is connected to pin 4 of plug J10-2, pin 36 of chip IC10 is connected to one pin of resistor R94 and one pin of capacitor C60, the other pin of capacitor C60 is connected to the common terminal capacitor The other leg of resistor R94 is connected to pin 3 of plug J10-2. Pin 37 of chip IC10 is connected to one leg of resistor R95 and one leg of capacitor C59. The other leg of capacitor C59 is connected to the common capacitor COM. The other leg of resistor R95 is connected to pin 2 of plug J10-2. Pin 38 of chip IC10 is connected to one leg of resistor R96. The other leg of resistor R96 is connected to pin 1 of plug J10-2 and one leg of capacitor C58. The other leg of capacitor C58 is connected to the common capacitor COM. Pin 40 of chip IC10 is connected to one leg of resistor R109 and the source of CMOS tube Q5. The other leg of resistor R109 and the gate of CMOS tube Q5 are connected to pin 2 of plug J9-2.The drain of CMOS tube Q5 is connected to pin 3 of plug J9-2, and all common terminal capacitors are connected to COM.

10. The intelligent controller applicable to a universal low-voltage circuit breaker according to claim 9, characterized in that: The display / button module includes: Plugs J11-2, J12-2; Liquid crystal display module LCM, buttons K1, K2, K3, K4; The plug J11-2 is connected to the socket J11-1 of the main control module, and the plug J12-2 is connected to the socket J12-1 of the main control module; In the liquid crystal display module LCM, pins 1, 2, 3, and 4 of the LCM are connected to pins 1, 2, 3, and 4 of the plug J11-2 respectively. One end of the buttons K1, K2, K3, and K4 are connected to pins 4, 3, 2, and 1 of the plug J12-2, respectively, and the other ends of the buttons K1, K2, K3, and K4 are all connected to pin 1 of the plug J11-2.

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