Intelligent terminal operation loop test platform

Abstract

The application provides a kind of intelligent terminal operating circuit test platform, it is related to power distribution training equipment technical field, the test platform includes: test table body, jump and close circuit input loop module, pressure input loop module, trip circuit module and close circuit module;The circuit board of jump and close circuit input loop module, pressure input loop module, trip circuit module and close circuit module is all set in the inside of test table body, and the circuit diagram of each module is all drawn on the operating panel of test table body, and the corresponding terminal in each module is led out from the inside circuit board to the corresponding position in the circuit diagram on the operating panel, for the wiring operation of operator.This scheme can directly display the loop of intelligent terminal, so as to improve the understanding of students on the related loop and principle of intelligent terminal, improve the training effect.

Description

Technical Field

[0001] This invention relates to the field of power distribution training equipment technology, and in particular to a smart terminal operation circuit test platform. Background Technology

[0002] Intelligent terminal equipment supports digital substations. It provides a digital interface for traditional circuit breakers and functions as a grounding control box. It can be used as an intelligent accessory for traditional circuit breakers. For example, the PRS-7789 intelligent terminal equipment receives control commands from associated bay-level equipment via a fiber optic GOOSE network or point-to-point fiber optic connection to perform phase-by-phase or three-phase operation of the circuit breaker. Simultaneously, it collects relevant status signals from the circuit breaker and uploads them to the bay-level equipment via fiber optic cable. The PRS-7789 is used with phase-by-phase or three-phase operating circuit breakers of 220kV and above, suitable for dual-configuration applications. The device features a fully enclosed design, strong anti-interference capability, and can be installed locally near the circuit breaker. Training is usually required to help operators quickly familiarize themselves with the use and principles of the intelligent terminal.

[0003] Currently, the most common form of training on smart terminals is the configuration of smart terminal screens. However, this approach only allows trainees to see the back panel and terminal blocks of the smart terminal, without providing them with an intuitive understanding of the actual circuits and principles of the smart terminal. Trainees' grasp of the circuits and principles of smart terminals is relatively shallow, which poses a significant risk in daily smart terminal maintenance and troubleshooting. Summary of the Invention

[0004] In view of this, and to address the above shortcomings, it is necessary to propose a smart terminal operation circuit test platform to intuitively display the smart terminal circuit, thereby improving trainees' understanding of the relevant circuits and principles of smart terminals and enhancing training effectiveness.

[0005] This invention provides a smart terminal operation circuit test platform, which includes: a test bench body, a trip / close input circuit module, a pressure input circuit module, a trip circuit module, and a close circuit module; the circuit boards of the trip / close input circuit module, the pressure input circuit module, the trip circuit module, and the close circuit module are all located inside the test bench body, and the circuit diagrams of each module are drawn on the operation panel of the test bench body. The corresponding terminals in each module are led out from the internal circuit board to the corresponding positions in the circuit diagram on the operation panel for operators to perform wiring operations.

[0006] Preferably, the circuit of the trip / close input circuit module includes: The positive terminal of AC contactor KM2 is connected to one end of terminal block terminal 4Q1D2. The other end of terminal block terminal 4Q1D2 is connected to one end of pressure monitoring relay contact 11YJJ. The other end of pressure monitoring relay contact 11YJJ is connected to one end of terminal block terminal 4Q1D6. The other end of terminal block terminal 4Q1D6 is connected to the positive terminal of AC contactor. Two pressure monitoring relay contacts 11YJJ are connected in parallel. Terminal block terminal 4C1D14 is connected to terminal block terminal 4Q1D6 and terminal block terminal 4C1D15 respectively. Terminal block terminal 4C1D14 is also connected to one end of pressure plate terminal 4C1LP4. The other end of pressure plate terminal 4C1LP4 is connected to one end of reclosing output contact 4H. The other end of reclosing output contact 4H is connected in series with terminal block terminal 4C1D19, reclosing relay 1ZHJ, reclosing relay 2ZHJ and resistor R and then connected to one end of terminal block terminal 4Q1D29. The other end of terminal block terminal 4Q1D29 is connected to the negative terminal of AC contactor KM2. Terminal block terminal 4C2D1 is connected to the positive terminal of AC contactor KM2, terminal block terminal 4C2D2, and one end of the remote control switch handle 4QK. The other end of terminal block terminal 4C2D2 is connected to one end of the five-proof interlocking contact 4BS. The other end of the five-proof interlocking contact 4BS is connected to terminal block terminal 4C2D4. Terminal block terminal 4C2D4 is connected to one end of the synchronous manual engagement and one end of the forced manual engagement switch handle 4QK. The other end of the synchronous manual engagement switch handle 4QK is connected to terminal block terminal 4C2D12. Terminal block terminal 4C2D12 is also connected to terminal block terminal 4C2D12. 13 Connection; The other end of the remote control switch handle 4QK is connected to terminal block terminal 4C2D6. Terminal block terminal 4C2D6 is also connected to one end of pressure plate terminal 4C1LP8. The other end of pressure plate terminal 4C1LP8 is connected to terminal block terminal 4C2D13. Terminal block terminal 4C2D13 is also connected in series with remote jump / close outlet contact CJ08, terminal block terminal 4C2D10, terminal block terminal 4Q1D11, pressure monitoring relay contact 3YJJ, manual closing relay 1SHJ, manual closing relay 2SHJ, and resistor R before being connected to terminal block terminal 4Q1D29. The other end of the switch handle 4Q for forced manual operation is connected to the manual engagement and manual disengagement ends of the operating handle 4KK respectively. The other end of the manual engagement end of the operating handle 4KK is connected to terminal 4Q1D12 of the terminal block. The other end of terminal 4Q1D12 of the terminal block is connected in series with pressure monitoring relay contact 21YJJ and then connected between pressure monitoring relay contact 3YJJ and manual engagement relay 1SHJ. Terminal block terminal 4C2D6 is connected in series with pressure plate terminal 4C1LP7, remote trip / close outlet contact CJ07, terminal block terminal 4C2D9, terminal block terminal 4Q1D14, manual trip relay STJA, manual trip relay STJB, manual trip relay STJC, and resistor R, and then connected to terminal block terminal 4Q1D29. Terminal block terminal 4Q1D14 is also connected to terminal block terminal 4Q1D15, and terminal block terminal 4Q1D15 is also connected to the other end of the manual trip handle 4KK. One end of the closing relay HHJ is connected between terminal block terminal 4Q1D11 and pressure monitoring relay contact 3YJJ, and the other end is connected in series with resistor R and then connected to terminal block terminal 4Q1D29. One end of the closing relay is also connected between terminal block terminal 4Q1D14 and manual trip relay STJA, and the other end is connected in series with resistor R and then connected to terminal block terminal 4Q1D29. One end of terminal block 4C1D1 is connected to the positive terminal of AC contactor KM2, and the other end is connected in series with photodiode D1, trip relay 11TJF, trip relay 12TJF, trip relay 13TJF, and resistor R, and then connected to terminal block 4Q1D29. The positive terminal of photodiode D1 is connected in parallel with photodiode D2, the negative terminal of photodiode D2 is connected to the first terminal of optocoupler OC1, the second terminal of optocoupler OC1 is connected to terminal block 4Q1D29, the third terminal of optocoupler OC1 is connected to the chip CPU, and the fourth terminal of optocoupler OC1 is grounded.

[0007] Preferably, the reclosing output contact 4H includes: The two ends of contact A are connected to terminal 4C1LP4 on the pressure plate and terminal 4C1D18 on the terminal block, respectively. Terminal 4C1D18 is connected to terminal 4C1D19 on the terminal block. The two ends of contact B are connected to terminal 4C1LP4 on the pressure plate and terminal 4C1D21 on the terminal block, respectively. Terminal 4C1D21 is connected to terminal 4C1D18 on the terminal block. The two ends of contact C are connected to terminal 4C1LP4 on the pressure plate and terminal 4C1D24 on the terminal block, respectively. Terminal 4C1D24 is connected to terminal 4C1D21 on the terminal block.

[0008] Preferably, in the trip-close input circuit, the pressure monitoring relay contacts 11YJJ, 3YJJ, and 21YJJ are respectively taken from the pressure monitoring relays 11YJJ, 3YJJ, and 21YJJ in the pressure input circuit module.

[0009] Preferably, the circuit of the pressure input loop module includes: Terminal block terminal 4Q1D2 is connected to the positive terminal of AC contactor KM2; one end of terminal block terminal 4Q1D4 is connected to the positive terminal of AC contactor KM2, and the other end is connected in series with terminal block terminal 4Q1D17, resistor R, pressure monitoring relay 21YJJ, and resistor R before being connected to terminal block terminal 4Q1D29. Terminal block terminal 4Q1D29 is also connected to the negative terminal of AC contactor KM2; one end of terminal block terminal 4Q1D21 is connected to the input terminal of pressure monitoring relay 21YJJ, and the other end is connected to the negative terminal of AC contactor KM2. Terminal block 4Q1D18 is connected to terminal block 4Q1D17. Terminal block 4Q1D18 is also connected in series with resistor R, pressure monitoring relay 3YJJ, and resistor R before being connected to terminal block 4Q1D29. One end of terminal block 4Q1D22 is connected to the input terminal of pressure monitoring relay 3YJJ, and the other end is connected to the negative terminal of AC contactor KM2. Terminal block 4Q1D19 is connected to terminal block 4Q1D18. Terminal block 4Q1D19 is also connected in series with resistor R, pressure monitoring relay 11YJJ, and resistor R before connecting to terminal block 4Q1D29. One end of terminal block 4Q1D23 is connected to the input terminal of pressure monitoring relay 11YJJ, and the other end is connected to the negative terminal of AC contactor KM2. Pressure monitoring relay contact 4YJJ is connected in parallel to pressure monitoring relay 11YJJ. Terminal block 4Q1D25 is connected to the positive terminal of AC contactor KM2. Terminal block 4Q1D25 is also connected in series with resistor R, pressure monitoring relay 4YJJ, and resistor R before being connected to terminal block 4Q1D29. Terminal block 4Q1D26 is connected to the input terminal of pressure monitoring relay 4YJJ.

[0010] Preferably, in the pressure input circuit module, the pressure monitoring relay contact 4YJJ is used to input the pressure monitoring relay 4YJJ into the circuit module.

[0011] Preferably, the circuit of the tripping circuit module includes: Terminal block terminal 4Q1D2 is connected to the positive terminal of AC contactor KM2. Terminal block terminal 4Q1D2 is also connected in series with closing relay HWJA, resistor R, resistor R, and terminal block terminal 4K1D1. The first terminal of optocoupler OC2 is connected to the output terminal of closing relay HWJA, the second terminal of optocoupler OC2 is connected between the two resistors R, the third terminal of optocoupler OC2 is connected to the CPU, and the fourth terminal is grounded. Terminal block terminal 4Q1D5 is connected to the positive terminal of AC contactor KM2. Terminal block terminal 4Q1D5 is also connected in series with trip relay contact 11TJF, trip holding relay TBJA, terminal block terminal 4K1D2, and one end of phase A of circuit breaker trip coil. The other end of phase A of circuit breaker trip coil is connected to the negative terminal of AC contactor KM2. Terminal block terminal 4K1D2 and terminal block terminal 4K1D1 are connected in series. 1D1 connection; one end of the trip holding relay contact TBJA is connected to terminal block terminal 4Q1D2, and the other end is connected to the input terminal of the trip holding relay TBJA; the manual trip relay contact STJA is connected in parallel across the two ends of the trip relay contact 11TJF; the two ends of the pressure monitoring relay contact 11YJJ are connected to terminal block terminals 4Q1D5 and 4Q1D2 respectively, and pressure monitoring relay contact 11YJJ is also connected in parallel across its two ends; the trip A contact is connected to terminal block terminal 4Q1D5, and the trip A contact is also connected in series with pressure plate terminal 4C1LP1 and terminal block terminal 4C1D4, and terminal block terminal 4C1D5 is connected to terminal block terminal 4C1D4 and the input terminal of the trip holding relay TBJA respectively; terminal block terminal 4Q1D29 is connected to the negative terminal of AC contactor KM2; Terminal block terminal 4Q1D2 is connected in series with closing relay HWJB, resistor R, resistor R, and terminal block terminal 4K1D4; the first terminal of optocoupler OC3 is connected to the output terminal of closing relay HWJB, the second terminal of optocoupler OC3 is connected between the two resistors R, the third terminal of optocoupler OC3 is connected to the CPU, and the fourth terminal is grounded; terminal block terminal 4Q1D5 is connected in series with trip relay contact 12TJF, trip holding relay TBJB, terminal block terminal 4K1D5, and one end of phase B of circuit breaker trip coil, and the other end of phase B of circuit breaker trip coil is connected to AC contactor. The negative terminal of KM2 is connected to terminal block terminal 4K1D5 and terminal block terminal 4K1D4; one end of the trip holding relay contact TBJB is connected to terminal block terminal 4Q1D2, and the other end is connected to the input terminal of the trip holding relay TBJB; the manual trip relay contact STJB is connected in parallel across the two ends of the trip relay contact 12TJF; the trip B contact is connected to terminal block terminal 4Q1D5, and the trip B contact is also connected in series with pressure plate terminal 4C1LP2 and terminal block terminal 4C1D7, and terminal block terminal 4C1D8 is connected to terminal block terminal 4C1D7 and the input terminal of the trip holding relay TBJB respectively; Terminal block terminal 4Q1D2 is connected in series with closing relay HWJC, resistor R, resistor R, and terminal block terminal 4K1D7; the first terminal of optocoupler OC4 is connected to the output terminal of closing relay HWJC, the second terminal of optocoupler OC4 is connected between the two resistors R, the third terminal of optocoupler OC4 is connected to the CPU, and the fourth terminal is grounded; terminal block terminal 4Q1D5 is connected in series with trip relay contact 13TJF, trip holding relay TBJC, terminal block terminal 4K1D8, and one end of phase C of circuit breaker trip coil; the other end of phase C of circuit breaker trip coil is connected to AC contactor K. The negative terminal of M2 is connected to terminal block terminal 4K1D8 and terminal block terminal 4K1D7; one end of the trip holding relay contact TBJC is connected to terminal block terminal 4Q1D2, and the other end is connected to the input terminal of the trip holding relay TBJC; the manual trip relay contact STJC is connected in parallel across the two ends of the trip relay contact 13TJF; the trip C contact is connected to terminal block terminal 4Q1D5, and the trip C contact is also connected in series with pressure plate terminal 4C1LP3 and terminal block terminal 4C1D10, and terminal block terminal 4C1D11 is connected to the input terminals of terminal block terminal 4C1D10 and trip holding relay TBJC respectively.

[0012] Preferably, in the trip circuit module, the pressure monitoring relay contact 11YJJ is taken from the pressure monitoring relay 11YJJ in the pressure input circuit module; the trip holding relay contacts TBJA, TBJB, and TBJC are taken from the trip holding relays TBJA, TBJB, and TBJC in the trip circuit module, respectively; and the trip relay contacts 11TJF, 12TJF, and 13TJF are taken from the trip relays 11TJF, 12TJF, and 13TJF in the trip closing input circuit module, respectively.

[0013] Preferably, the circuit of the closing circuit module includes: Terminal block terminal 4Q1D2 is connected to the positive terminal of AC contactor KM2. Terminal block terminal 4Q1D2 is also connected in series with trip relay TWJA, resistor R1, resistor R2, terminal block terminal 4K1D10, and the normally closed auxiliary contact DLA of phase A of the circuit breaker. The other end of the normally closed auxiliary contact DLA of phase A of the circuit breaker is connected to the negative terminal of AC contactor KM2. Terminal block terminal 4Q1D29 is connected to the negative terminal of AC contactor KM2. The first terminal of optocoupler OC5 is connected to the output terminal of trip relay TWJA, the second terminal of optocoupler OC5 is connected between the two resistors R1, the third terminal of optocoupler OC5 is connected to the CPU, and the fourth terminal is grounded. Terminal block terminal 4Q1D6 is connected to the positive terminal of AC contactor KM2. The circuit breaker closing coil A-phase of the circuit breaker closing coil is connected in series with the manual closing relay contact 1SHJ-1, the closing holding relay HBJA, the terminal block terminal 4K1D11, and one end of the circuit breaker closing coil A-phase. The other end of the circuit breaker closing coil A-phase is connected to the negative terminal of the AC contactor KM2. The two ends of the pressure monitoring relay contact 11YJJ are connected to the terminal block terminal 4Q1D2 and the terminal block terminal 4Q1D6 respectively. The two ends of the pressure monitoring relay contact 11YJJ are also connected in parallel with the pressure monitoring relay contact 11YJJ. The two ends of the closing holding relay contact HBJA are connected to the terminal block terminal 4Q1D2 and the input terminal of the closing holding relay HBJA respectively. The reclosing relay contact 1ZHJ-1 is connected in parallel with the two ends of the manual closing relay contact 1SHJ-1. Terminal block terminal 4Q1D2 is connected in series with trip relay TWJB, resistor R, resistor R, terminal block terminal 4K1D14, and circuit breaker phase B normally closed auxiliary contact DLB. The other end of circuit breaker phase B normally closed auxiliary contact DLB is connected to the negative terminal of AC contactor KM2. The first end of optocoupler OC6 is connected to the output terminal of trip relay TWJB, the second end of optocoupler OC6 is connected between the two resistors R, the third end of optocoupler OC6 is connected to the CPU, and the fourth end is grounded. Terminal 4Q1D6 is connected in series with manual closing relay contact 1SHJ-2, closing holding relay HBJB, terminal block terminal 4K1D15, and one end of phase B of the circuit breaker closing coil. The other end of phase B of the circuit breaker closing coil is connected to the negative terminal of AC contactor KM2. The two ends of closing holding relay contact HBJB are connected to terminal block terminal 4Q1D2 and the input terminal of closing holding relay HBJB, respectively. Reclosing relay contact 1ZHJ-2 is connected in parallel to the two ends of manual closing relay contact 1SHJ-2. Terminal block terminal 4Q1D2 is connected in series with trip relay TWJC, resistor R, resistor R, terminal block terminal 4K1D18, and circuit breaker C-phase normally closed auxiliary contact DLC. The other end of the circuit breaker C-phase normally closed auxiliary contact DLC is connected to the negative terminal of AC contactor KM2. The first end of optocoupler OC7 is connected to the output terminal of trip relay TWJC, the second end of optocoupler OC7 is connected between the two resistors R, the third end of optocoupler OC7 is connected to the CPU, and the fourth end is grounded. Terminal 4Q1D6 is connected in series with the manual closing relay contact 2SHJ-1, the closing holding relay HBJC, terminal block terminal 4K1D19, and one end of phase C of the circuit breaker closing coil. The other end of phase C of the circuit breaker closing coil is connected to the negative terminal of AC contactor KM2. The two ends of the closing holding relay contact HBJC are connected to the input terminals of terminal block terminal 4Q1D2 and the closing holding relay HBJC, respectively. The reclosing relay contact 2ZHJ-1 is connected in parallel to the two ends of the manual closing relay contact 2SHJ-1.

[0014] Preferably, in the closing circuit module, the pressure monitoring relay contact 11YJJ is taken from the pressure monitoring relay 11YJJ of the pressure input circuit module; the closing holding relay contacts HBJA, HBJB, and HBJC are taken from the closing holding relays HBJA, HBJB, and HBJC of the closing circuit module, respectively; the manual closing relay contacts 1SHJ-1 and 1SHJ-2 are taken from the manual closing relay 1SHJ of the trip closing input circuit module, and the manual closing relay contact 2SHJ is taken from the manual closing relay 2SHJ of the trip closing input circuit module; the reclosing relay contacts 1ZHJ-1 and 1ZHJ-2 are taken from the reclosing relay 1ZHJ of the trip closing input circuit module, and the reclosing relay contact 2ZHJ is taken from the reclosing relay of the trip closing input circuit module.

[0015] As can be seen from the above technical solution, the intelligent terminal operation circuit test platform provided in this embodiment of the invention includes a test bench body, a trip input circuit module, a pressure input circuit module, a trip circuit module, and a closing circuit module. The circuit board of each module is located inside the test bench body, and the circuit diagram of each module is drawn on the operation panel of the test bench body. The corresponding terminals in each module are led out from the internal circuit board to the corresponding positions in the circuit on the operation panel. In this way, operators can not only perform wiring operations and conduct training experiments on intelligent terminals based on each module, but also clearly and intuitively see the circuit connection relationship, action coordination relationship, and operation principle of each module during the test operation, thereby deepening the trainees' understanding of intelligent terminal operation circuit testing and improving the training effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a smart terminal operation loop test platform provided in an embodiment of the present invention.

[0017] Figure 2 The circuit diagram is provided for a trip / close input circuit module according to an embodiment of the present invention.

[0018] Figure 3 A circuit diagram of a pressure input loop module provided in an embodiment of the present invention.

[0019] Figure 4 The circuit diagram is provided for a tripping circuit module according to an embodiment of the present invention.

[0020] Figure 5 A circuit diagram of a closing circuit module provided in an embodiment of the present invention.

[0021] In the diagram: Test bench body 10, trip / close input circuit module 20, pressure input circuit module 30, trip circuit module 40, and close circuit module 50. Detailed Implementation

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] like Figure 1 As shown, the present invention provides a smart terminal operation circuit test platform, which includes: a test bench body 10, a trip / close input circuit module 20, a pressure input circuit module 30, a trip circuit module 40, and a close circuit module 50; the circuit boards of the trip / close input circuit module 20, the pressure input circuit module 30, the trip circuit module 40, and the close circuit module 50 are all disposed inside the test bench body 10, and the circuit diagrams of each module are drawn on the operation panel of the test bench body 10. The corresponding terminals in each module are led out from the internal circuit board to the corresponding positions in the circuit diagram on the operation panel for the operator to perform wiring operations.

[0024] In this embodiment, operators can not only perform wiring operations and conduct training experiments on smart terminals based on each module, but also clearly and intuitively see the circuit connection relationships, action coordination relationships, and operating principles of each module during the test operation. This deepens the trainees' understanding of the smart terminal operation circuit test and improves the training effect. For example, terminal blocks, handle terminals, pressure plate terminals, and five-proof interlocking terminals are led to their corresponding positions on the circuit diagram and made into sockets. The wiring between terminals is completed by the trainees according to the drawings. Compared with the traditional training method for smart terminal screen assembly, designing the schematic diagram directly on the test platform makes it easier for trainees to understand and master the principle of the operation circuit. They also have a clearer understanding of the contacts, relays, pressure plates, and other components in the circuit. By practicing wiring themselves, trainees can better understand the circuit function, troubleshoot circuit problems, improve their smart terminal maintenance and troubleshooting skills, and reduce the risk of smart terminal operation on site.

[0025] See Figure 2-5 These are the circuit diagrams for the trip / close input circuit module, the pressure input circuit module, the trip circuit module, and the close circuit module, respectively.

[0026] The following section uses specific examples of protection tests to illustrate this scheme: 1. Taking protective strip A as an example (B and C are similar) (1) Without pressure circuit like Figure 4 The circuit diagram of the trip circuit module 40 shown is as follows: Figure 5 The circuit diagram of the closing circuit module 50 shown indicates that terminal blocks 4Q1D2 and 4Q1D5 are shorted, crossing the pressure circuit. Terminal block 4K1D2 is connected to the simulated circuit breaker, and the pressure plate terminal 4C1LP1 is engaged, closing the trip A contact. Alternatively, the test line shorts contacts 417 and 418 at both ends of the trip A contact. The trip holding relay TBJA is activated, and its normally open contact TBJA closes, forming a self-holding circuit and completing the A-phase trip. After the A-phase trips, the normally open contact DLA of the circuit breaker opens, the trip holding relay TBJA returns to its original position, and the trip holding relay contact TBJA opens again. (The last sentence appears to be a separate, unrelated statement.) Figure 5 At the same time, the normally closed contact of DLA closes, and the trip relay TWJA operates.

[0027] (2) With pressure circuit like Figure 4 As shown, terminal block terminal 4Q1D2 is disconnected from terminal block terminal 4Q1D5. The positive voltage of terminal block terminal 4Q1D2 needs to be connected to terminal block terminal 4Q1D5 through pressure monitoring relay contact 11YJJ.

[0028] 1) When the low pressure interlocking trip contact between terminal blocks 4Q1D23 and 4Q1D29 is open, the pressure monitoring relay 11YJJ can operate, its normally open contact is closed, and terminal blocks 4Q1D2 and 4Q1D5 are connected, allowing the protection to trip normally (A). When the low pressure interlocking trip contact between terminal blocks 4Q1D23 and 4Q1D29 is closed, positive current passes through terminal block 4Q1D23 and across the pressure monitoring relay 11YJJ. The pressure monitoring relay 11YJJ cannot operate, its normally open contact is open, and terminal blocks 4Q1D2 and 4Q1D5 are not connected, preventing the protection from tripping (A).

[0029] 2) When the pressure-disabling contact between terminal block terminals 4Q1D4 and 4Q1D25 is closed, the pressure monitoring relay 4YJJ will operate, and the normally open contact of the pressure monitoring relay 4YJJ will close. Positive current will pass through the normally closed contact of the pressure monitoring relay 4YJJ and then across the pressure monitoring relay 11YJJ. The pressure monitoring relay 11YJJ will not operate, and the normally open contact of the pressure monitoring relay 11YJJ will open. Terminal block terminals 4Q1D2 and 4Q1D5 will not conduct, and the protection will not trip.

[0030] 2. Taking protection contract A as an example (the same applies to contracts B and C). (1) Without pressure circuit like Figure 2 , 4 As shown in Figure 5, terminal blocks 4Q1D2 and 4Q1D6 are short-circuited, crossing the pressure circuit. Terminal block 4K1D11 is connected to the simulated circuit breaker, and pressure plate terminal 4C1LP4 is engaged to close contact A. Alternatively, the test line can be short-circuited to contacts 423 and 424 at both ends of contact A. Reclosing relays 1ZHJ and 2ZHJ are activated. When reclosing relay contact 1ZHJ-1 closes, the normally open contact of the closing holding relay HBJA closes, forming a self-holding circuit and completing phase A closing. After phase A closes, the normally closed contact of the circuit breaker's DLA opens, the closing holding relay HBJA returns to its original position, and the closing holding relay contact HBJA opens. Simultaneously, the normally open contact of the circuit breaker's DLA closes, and the closing position relay HWJA operates.

[0031] (2) With pressure circuit Terminal block 4Q1D2 is disconnected from terminal block 4Q1D6. Positive power to 4Q1D2 needs to be connected to terminal block 4Q1D6 through pressure monitoring relay contact 11YJJ. 1) When the low pressure interlocking trip contact between terminal blocks 4Q1D23 and 4Q1D29 is open, the pressure monitoring relay 11YJJ can operate, the normally open contact of the pressure monitoring relay 11YJJ is closed, and terminal blocks 4Q1D2 and 4Q1D6 are connected, allowing the protection to close normally. 2) When the low pressure interlocking trip contact between terminal blocks 4Q1D23 and 4Q1D29 is closed, positive current passes through terminal block 4Q1D23 and across the pressure monitoring relay 11YJJ, preventing the relay from operating. The normally open contact of the pressure monitoring relay 11YJJ is open, and terminal blocks 4Q1D2 and 4Q1D6 are not connected, preventing the protection from tripping.

[0032] 2) When the pressure prohibition contact between terminal block terminals 4Q1D4 and 4Q1D25 is closed, the pressure monitoring relay 4YJJ will operate, and the normally open contact of the pressure monitoring relay 4YJJ will close. Positive current will pass through the normally closed contact of the pressure monitoring relay 4YJJ and cross the pressure monitoring relay 11YJJ. The pressure monitoring relay 11YJJ will not operate, and the normally open contact of the pressure monitoring relay 11YJJ will open. Terminal block terminals 4Q1D2 and 4Q1D6 will not conduct, and the protection cannot be closed.

[0033] The circuit breaker closing coils are HQA, HQB, and HQC, and the circuit breaker tripping coils are TQA, TQB, and TQC.

[0034] It should be noted that the operation of other circuits is similar. The circles marked with numbers in the diagram are also contacts, which operators can connect.

[0035] In addition, the relays and relay contacts in the diagram can be made dynamic to display the relay operation and contact operation in real time, so as to further visualize the operation circuit and deepen the trainees' understanding of the operation circuit.

[0036] The modules or units in the device of this invention can be merged, divided, and deleted according to actual needs. The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the invention. Those skilled in the art will understand that implementing all or part of the processes of the above embodiments and making equivalent changes according to the claims of this invention still fall within the scope of the invention.

Claims

1. A test platform for an intelligent terminal operation loop, characterized in that, The test platform includes: a test bench body, a trip / close input circuit module, a pressure input circuit module, a trip circuit module, and a close circuit module; the circuit boards of the trip / close input circuit module, the pressure input circuit module, the trip circuit module, and the close circuit module are all located inside the test bench body, and the circuit diagrams of each module are drawn on the operation panel of the test bench body. The corresponding terminals in each module are led out from the internal circuit board to the corresponding positions in the circuit diagram on the operation panel for operators to perform wiring operations. The circuit of the pressure input loop module includes: Terminal block terminal 4Q1D2 is connected to the positive terminal of AC contactor KM2; one end of terminal block terminal 4Q1D4 is connected to the positive terminal of AC contactor KM2, and the other end is connected in series with terminal block terminal 4Q1D17, resistor R, pressure monitoring relay 21YJJ, and resistor R before being connected to terminal block terminal 4Q1D29. Terminal block terminal 4Q1D29 is also connected to the negative terminal of AC contactor KM2; one end of terminal block terminal 4Q1D21 is connected to the input terminal of pressure monitoring relay 21YJJ, and the other end is connected to the negative terminal of AC contactor KM2. Terminal block 4Q1D18 is connected to terminal block 4Q1D17. Terminal block 4Q1D18 is also connected in series with resistor R, pressure monitoring relay 3YJJ, and resistor R before being connected to terminal block 4Q1D29. One end of terminal block 4Q1D22 is connected to the input terminal of pressure monitoring relay 3YJJ, and the other end is connected to the negative terminal of AC contactor KM2. Terminal block 4Q1D19 is connected to terminal block 4Q1D18. Terminal block 4Q1D19 is also connected in series with resistor R, pressure monitoring relay 11YJJ, and resistor R before connecting to terminal block 4Q1D29. One end of terminal block 4Q1D23 is connected to the input terminal of pressure monitoring relay 11YJJ, and the other end is connected to the negative terminal of AC contactor KM2. Pressure monitoring relay contact 4YJJ is connected in parallel to pressure monitoring relay 11YJJ. Terminal block 4Q1D25 is connected to the positive terminal of AC contactor KM2. Terminal block 4Q1D25 is also connected in series with resistor R, pressure monitoring relay 4YJJ, and resistor R before being connected to terminal block 4Q1D29. Terminal block 4Q1D26 is connected to the input terminal of pressure monitoring relay 4YJJ.

2. The intelligent terminal operation loop test platform according to claim 1, characterized in that, The circuit of the trip / close input circuit module includes: The positive terminal of AC contactor KM2 is connected to one end of terminal block terminal 4Q1D2. The other end of terminal block terminal 4Q1D2 is connected to one end of pressure monitoring relay contact 11YJJ. The other end of pressure monitoring relay contact 11YJJ is connected to one end of terminal block terminal 4Q1D6. The other end of terminal block terminal 4Q1D6 is connected to the positive terminal of AC contactor. Two pressure monitoring relay contacts 11YJJ are connected in parallel. Terminal block terminal 4C1D14 is connected to terminal block terminal 4Q1D6 and terminal block terminal 4C1D15 respectively. Terminal block terminal 4C1D14 is also connected to one end of pressure plate terminal 4C1LP4. The other end of pressure plate terminal 4C1LP4 is connected to one end of reclosing output contact 4H. The other end of reclosing output contact 4H is connected in series with terminal block terminal 4C1D19, reclosing relay 1ZHJ, reclosing relay 2ZHJ and resistor R and then connected to one end of terminal block terminal 4Q1D29. The other end of terminal block terminal 4Q1D29 is connected to the negative terminal of AC contactor KM2. Terminal block terminal 4C2D1 is connected to the positive terminal of AC contactor KM2, terminal block terminal 4C2D2, and one end of the remote control switch handle 4QK. The other end of terminal block terminal 4C2D2 is connected to one end of the five-proof interlocking contact 4BS. The other end of the five-proof interlocking contact 4BS is connected to terminal block terminal 4C2D4. Terminal block terminal 4C2D4 is connected to one end of the synchronous manual engagement and one end of the forced manual engagement switch handle 4QK. The other end of the synchronous manual engagement switch handle 4QK is connected to terminal block terminal 4C2D12. Terminal block terminal 4C2D12 is also connected to terminal block terminal 4C2D12. 13 Connection; The other end of the remote control switch handle 4QK is connected to terminal block terminal 4C2D6. Terminal block terminal 4C2D6 is also connected to one end of pressure plate terminal 4C1LP8. The other end of pressure plate terminal 4C1LP8 is connected to terminal block terminal 4C2D13. Terminal block terminal 4C2D13 is also connected in series with remote jump / close outlet contact CJ08, terminal block terminal 4C2D10, terminal block terminal 4Q1D11, pressure monitoring relay contact 3YJJ, manual closing relay 1SHJ, manual closing relay 2SHJ, and resistor R before being connected to terminal block terminal 4Q1D29. The other end of the switch handle 4Q for forced manual operation is connected to the manual engagement and manual disengagement ends of the operating handle 4KK respectively. The other end of the manual engagement end of the operating handle 4KK is connected to terminal 4Q1D12 of the terminal block. The other end of terminal 4Q1D12 of the terminal block is connected in series with pressure monitoring relay contact 21YJJ and then connected between pressure monitoring relay contact 3YJJ and manual engagement relay 1SHJ. Terminal block terminal 4C2D6 is connected in series with pressure plate terminal 4C1LP7, remote trip / close outlet contact CJ07, terminal block terminal 4C2D9, terminal block terminal 4Q1D14, manual trip relay STJA, manual trip relay STJB, manual trip relay STJC, and resistor R, and then connected to terminal block terminal 4Q1D29. Terminal block terminal 4Q1D14 is also connected to terminal block terminal 4Q1D15, and terminal block terminal 4Q1D15 is also connected to the other end of the manual trip handle 4KK. One end of the closing relay HHJ is connected between terminal block terminal 4Q1D11 and pressure monitoring relay contact 3YJJ, and the other end is connected in series with resistor R and then connected to terminal block terminal 4Q1D29. One end of the closing relay is also connected between terminal block terminal 4Q1D14 and manual trip relay STJA, and the other end is connected in series with resistor R and then connected to terminal block terminal 4Q1D29. One end of terminal block 4C1D1 is connected to the positive terminal of AC contactor KM2, and the other end is connected in series with photodiode D1, trip relay 11TJF, trip relay 12TJF, trip relay 13TJF, and resistor R, and then connected to terminal block 4Q1D29. The positive terminal of photodiode D1 is connected in parallel with photodiode D2, the negative terminal of photodiode D2 is connected to the first terminal of optocoupler OC1, the second terminal of optocoupler OC1 is connected to terminal block 4Q1D29, the third terminal of optocoupler OC1 is connected to the chip CPU, and the fourth terminal of optocoupler OC1 is grounded.

3. The intelligent terminal operation loop test platform according to claim 2, characterized in that, The reclosing output contact 4H includes: The two ends of contact A are connected to terminal 4C1LP4 on the pressure plate and terminal 4C1D18 on the terminal block, respectively. Terminal 4C1D18 is connected to terminal 4C1D19 on the terminal block. The two ends of contact B are connected to terminal 4C1LP4 on the pressure plate and terminal 4C1D21 on the terminal block, respectively. Terminal 4C1D21 is connected to terminal 4C1D18 on the terminal block. The two ends of contact C are connected to terminal 4C1LP4 on the pressure plate and terminal 4C1D24 on the terminal block, respectively. Terminal 4C1D24 is connected to terminal 4C1D21 on the terminal block.

4. The intelligent terminal operation loop test platform according to claim 2, characterized in that, In the trip-close input circuit, the pressure monitoring relay contacts 11YJJ, 3YJJ, and 21YJJ are respectively taken from the pressure monitoring relays 11YJJ, 3YJJ, and 21YJJ in the pressure input circuit module.

5. The intelligent terminal operation loop test platform according to claim 1, characterized in that, In the pressure input circuit module, the pressure monitoring relay contact 4YJJ is used to input the pressure monitoring relay 4YJJ into the circuit module.

6. The intelligent terminal operation loop test platform according to claim 1, characterized in that, The circuit of the trip circuit module includes: Terminal block terminal 4Q1D2 is connected to the positive terminal of AC contactor KM2. Terminal block terminal 4Q1D2 is also connected in series with closing relay HWJA, resistor R, resistor R, and terminal block terminal 4K1D1. The first terminal of optocoupler OC2 is connected to the output terminal of closing relay HWJA, the second terminal of optocoupler OC2 is connected between the two resistors R, the third terminal of optocoupler OC2 is connected to the CPU, and the fourth terminal is grounded. Terminal block terminal 4Q1D5 is connected to the positive terminal of AC contactor KM2. Terminal block terminal 4Q1D5 is also connected in series with trip relay contact 11TJF, trip holding relay TBJA, terminal block terminal 4K1D2, and one end of phase A of circuit breaker trip coil. The other end of phase A of circuit breaker trip coil is connected to the negative terminal of AC contactor KM2. Terminal block terminal 4K1D2 and terminal block terminal 4K1D1 are connected in series. 1D1 connection; one end of the trip holding relay contact TBJA is connected to terminal block terminal 4Q1D2, and the other end is connected to the input terminal of the trip holding relay TBJA; the manual trip relay contact STJA is connected in parallel across the two ends of the trip relay contact 11TJF; the two ends of the pressure monitoring relay contact 11YJJ are connected to terminal block terminals 4Q1D5 and 4Q1D2 respectively, and pressure monitoring relay contact 11YJJ is also connected in parallel across its two ends; the trip A contact is connected to terminal block terminal 4Q1D5, and the trip A contact is also connected in series with pressure plate terminal 4C1LP1 and terminal block terminal 4C1D4, and terminal block terminal 4C1D5 is connected to terminal block terminal 4C1D4 and the input terminal of the trip holding relay TBJA respectively; terminal block terminal 4Q1D29 is connected to the negative terminal of AC contactor KM2; Terminal block terminal 4Q1D2 is connected in series with closing relay HWJB, resistor R, resistor R, and terminal block terminal 4K1D4; the first terminal of optocoupler OC3 is connected to the output terminal of closing relay HWJB, the second terminal of optocoupler OC3 is connected between the two resistors R, the third terminal of optocoupler OC3 is connected to the CPU, and the fourth terminal is grounded; terminal block terminal 4Q1D5 is connected in series with trip relay contact 12TJF, trip holding relay TBJB, terminal block terminal 4K1D5, and one end of phase B of circuit breaker trip coil, and the other end of phase B of circuit breaker trip coil is connected to AC contactor. The negative terminal of KM2 is connected to terminal block terminal 4K1D5 and terminal block terminal 4K1D4; one end of the trip holding relay contact TBJB is connected to terminal block terminal 4Q1D2, and the other end is connected to the input terminal of the trip holding relay TBJB; the manual trip relay contact STJB is connected in parallel across the two ends of the trip relay contact 12TJF; the trip B contact is connected to terminal block terminal 4Q1D5, and the trip B contact is also connected in series with pressure plate terminal 4C1LP2 and terminal block terminal 4C1D7, and terminal block terminal 4C1D8 is connected to terminal block terminal 4C1D7 and the input terminal of the trip holding relay TBJB respectively; Terminal block terminal 4Q1D2 is connected in series with closing relay HWJC, resistor R, resistor R, and terminal block terminal 4K1D7; the first terminal of optocoupler OC4 is connected to the output terminal of closing relay HWJC, the second terminal of optocoupler OC4 is connected between the two resistors R, the third terminal of optocoupler OC4 is connected to the CPU, and the fourth terminal is grounded; terminal block terminal 4Q1D5 is connected in series with trip relay contact 13TJF, trip holding relay TBJC, terminal block terminal 4K1D8, and one end of phase C of circuit breaker trip coil; the other end of phase C of circuit breaker trip coil is connected to AC contactor K. The negative terminal of M2 is connected to terminal block terminal 4K1D8 and terminal block terminal 4K1D7; one end of the trip holding relay contact TBJC is connected to terminal block terminal 4Q1D2, and the other end is connected to the input terminal of the trip holding relay TBJC; the manual trip relay contact STJC is connected in parallel across the two ends of the trip relay contact 13TJF; the trip C contact is connected to terminal block terminal 4Q1D5, and the trip C contact is also connected in series with pressure plate terminal 4C1LP3 and terminal block terminal 4C1D10, and terminal block terminal 4C1D11 is connected to the input terminals of terminal block terminal 4C1D10 and trip holding relay TBJC respectively.

7. The intelligent terminal operation loop test platform according to claim 6, characterized in that, In the trip circuit module, the pressure monitoring relay contact 11YJJ is taken from the pressure monitoring relay 11YJJ in the pressure input circuit module; the trip holding relay contacts TBJA, TBJB, and TBJC are taken from the trip holding relays TBJA, TBJB, and TBJC in the trip circuit module, respectively; and the trip relay contacts 11TJF, 12TJF, and 13TJF are taken from the trip relays 11TJF, 12TJF, and 13TJF in the trip closing input circuit module, respectively.

8. The intelligent terminal operation loop test platform according to claim 1, characterized in that, The circuit of the closing circuit module includes: Terminal block terminal 4Q1D2 is connected to the positive terminal of AC contactor KM2. Terminal block terminal 4Q1D2 is also connected in series with trip relay TWJA, resistor R1, resistor R2, terminal block terminal 4K1D10, and the normally closed auxiliary contact DLA of phase A of the circuit breaker. The other end of the normally closed auxiliary contact DLA of phase A of the circuit breaker is connected to the negative terminal of AC contactor KM2. Terminal block terminal 4Q1D29 is connected to the negative terminal of AC contactor KM2. The first terminal of optocoupler OC5 is connected to the output terminal of trip relay TWJA, the second terminal of optocoupler OC5 is connected between the two resistors R1, the third terminal of optocoupler OC5 is connected to the CPU, and the fourth terminal is grounded. Terminal block terminal 4Q1D6 is connected to the positive terminal of AC contactor KM2. The circuit breaker closing coil A-phase of the circuit breaker closing coil is connected in series with the manual closing relay contact 1SHJ-1, the closing holding relay HBJA, the terminal block terminal 4K1D11, and one end of the circuit breaker closing coil A-phase. The other end of the circuit breaker closing coil A-phase is connected to the negative terminal of the AC contactor KM2. The two ends of the pressure monitoring relay contact 11YJJ are connected to the terminal block terminal 4Q1D2 and the terminal block terminal 4Q1D6 respectively. The two ends of the pressure monitoring relay contact 11YJJ are also connected in parallel with the pressure monitoring relay contact 11YJJ. The two ends of the closing holding relay contact HBJA are connected to the terminal block terminal 4Q1D2 and the input terminal of the closing holding relay HBJA respectively. The reclosing relay contact 1ZHJ-1 is connected in parallel with the two ends of the manual closing relay contact 1SHJ-1. Terminal block terminal 4Q1D2 is connected in series with trip relay TWJB, resistor R, resistor R, terminal block terminal 4K1D14, and circuit breaker phase B normally closed auxiliary contact DLB. The other end of circuit breaker phase B normally closed auxiliary contact DLB is connected to the negative terminal of AC contactor KM2. The first end of optocoupler OC6 is connected to the output terminal of trip relay TWJB, the second end of optocoupler OC6 is connected between the two resistors R, the third end of optocoupler OC6 is connected to the CPU, and the fourth end is grounded. Terminal 4Q1D6 is connected in series with manual closing relay contact 1SHJ-2, closing holding relay HBJB, terminal block terminal 4K1D15, and one end of phase B of the circuit breaker closing coil. The other end of phase B of the circuit breaker closing coil is connected to the negative terminal of AC contactor KM2. The two ends of closing holding relay contact HBJB are connected to terminal block terminal 4Q1D2 and the input terminal of closing holding relay HBJB, respectively. Reclosing relay contact 1ZHJ-2 is connected in parallel to the two ends of manual closing relay contact 1SHJ-2. Terminal block terminal 4Q1D2 is connected in series with trip relay TWJC, resistor R, resistor R, terminal block terminal 4K1D18, and circuit breaker C-phase normally closed auxiliary contact DLC. The other end of the circuit breaker C-phase normally closed auxiliary contact DLC is connected to the negative terminal of AC contactor KM2. The first end of optocoupler OC7 is connected to the output terminal of trip relay TWJC, the second end of optocoupler OC7 is connected between the two resistors R, the third end of optocoupler OC7 is connected to the CPU, and the fourth end is grounded. Terminal 4Q1D6 is connected in series with the manual closing relay contact 2SHJ-1, the closing holding relay HBJC, terminal block terminal 4K1D19, and one end of phase C of the circuit breaker closing coil. The other end of phase C of the circuit breaker closing coil is connected to the negative terminal of AC contactor KM2. The two ends of the closing holding relay contact HBJC are connected to the input terminals of terminal block terminal 4Q1D2 and the closing holding relay HBJC, respectively. The reclosing relay contact 2ZHJ-1 is connected in parallel to the two ends of the manual closing relay contact 2SHJ-1.

9. The intelligent terminal operation loop test platform according to claim 8, characterized in that, In the closing circuit module, the pressure monitoring relay contact 11YJJ is taken from the pressure monitoring relay 11YJJ of the pressure input circuit module; the closing holding relay contacts HBJA, HBJB, and HBJC are taken from the closing holding relays HBJA, HBJB, and HBJC of the closing circuit module, respectively; the manual closing relay contacts 1SHJ-1 and 1SHJ-2 are taken from the manual closing relay 1SHJ of the trip closing input circuit module, and the manual closing relay contact 2SHJ is taken from the manual closing relay 2SHJ of the trip closing input circuit module; the reclosing relay contacts 1ZHJ-1 and 1ZHJ-2 are taken from the reclosing relay 1ZHJ of the trip closing input circuit module, and the reclosing relay contact 2ZHJ is taken from the reclosing relay of the trip closing input circuit module.

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