Comprehensive detection circuit structure based on reclosing

Abstract

The utility model relates to a comprehensive detection circuit structure based on reclosing, which comprises a working circuit, a load circuit, and a power supply module and a detection assembly which are respectively connected with the working circuit and the load circuit, and the detection assembly comprises a mutual inductance coil, a sampling resistor and a temperature probe. The device further comprises a main control module, an electric leakage signal module, a current acquisition module, a temperature acquisition module, a tripping module, a motor module and a limiting sensor. The objective of the utility model is to divide a power supply circuit into a working circuit for reclosing power supply and a load circuit for a user to use, so that the working circuit for reclosing is independent, and the normal operation of reclosing is prevented from being influenced by external factors. According to the utility model, the detection assembly, the main control module, the electric leakage signal module, the current acquisition module, the temperature acquisition module, the tripping module, the motor module and the limiting sensor are all concentrated in the reclosure, so that the reclosure function is integrated.

Description

Technical Field

[0001] This utility model relates to the technical field of circuit technology, and in particular to a comprehensive detection circuit structure based on reclosing. Background Technology

[0002] Reclosing is mainly used for most transient faults. When a fault occurs in a transmission line, the circuit breaker will open. As the fault point deionizes, the fault will be eliminated on its own. At this time, the reclosing circuit breaker will close, thereby reducing power outage time and improving power supply reliability. However, traditional reclosing circuit breakers do not have functions such as leakage protection and high temperature protection, and cannot meet the needs of intelligent integrated circuit control. They need to be used in conjunction with leakage protection devices and temperature sensors, resulting in more external connection points for cables and potential electrical safety hazards. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the technical solution adopted by this utility model is: a comprehensive detection circuit structure based on reclosing, including a working circuit and a load circuit, as well as a power supply module and a detection component connected to the working circuit and the load circuit respectively. The detection component includes a mutual inductance coil, a sampling resistor and a temperature probe, and also includes a main control module, a leakage current signal module, a current acquisition module, a temperature acquisition module, a tripping module, a motor module and a limit sensor. The power supply module is electrically connected to the main control module and provides power to it. The main control module is electrically connected to the mutual inductance coil, the sampling resistor and the temperature probe through the leakage current signal module, the current acquisition module and the temperature acquisition module respectively. The main control module is electrically connected to the tripping module and the motor module for controlling the on and off of the load circuit, and to the limit sensor for detecting the position of the reclosing switch.

[0004] The above technical solution divides the power supply circuit into a working circuit for reclosing and a load circuit for user use. This makes the working circuit of the reclosing independent, avoiding external factors from affecting the normal operation of the reclosing. The detection components, main control module, leakage signal module, current acquisition module, temperature acquisition module, trip module, motor module, and limit sensor are all concentrated in the reclosing circuit. The main control module monitors the load circuit through the leakage signal module, current acquisition module, and temperature acquisition module. When the load circuit experiences leakage, overcurrent, or high temperature, the trip module automatically controls the reclosing switch to disconnect the load circuit. The limit sensor detects that the reclosing switch is in the open or closed position, and the motor module controls the reclosing switch to close the load circuit again. This allows for rapid restoration of power supply after a power outage, ensuring the user's power needs.

[0005] The present invention is further configured such that the power supply module has a DC power supply terminal and a regulated power supply terminal. The DC power supply terminal provides power to the motor module, and the regulated power supply terminal provides power to the main control module, the leakage signal module and the current acquisition module. The working circuit is converted into the DC power supply terminal required by the motor through a transformer, and then converted into the regulated power supply terminal required by the chip through a regulated power supply.

[0006] The present invention is further configured such that the trip module is provided with a trip coil for disconnecting the load circuit. The trip coil is an electromagnet coil. When the main control module sends a trip command, the trip coil is energized and attracts the reclosing switch, thereby controlling the reclosing switch to disconnect the load circuit. The trip module is also provided with a test button for judging whether the trip structure is normal.

[0007] This utility model is further configured such that the motor module has a power supply terminal, a signal receiving terminal, and an output terminal for controlling the motor drive. The DC power supply terminal is electrically connected to the motor module and provides power. The main control module is electrically connected to the motor module through the signal receiving terminal. The motor module is a PN7705 two-channel driver chip, where pin 1 is a fault detection port, pins 2 and 3 are signal input terminals for controlling the forward and reverse rotation of the motor, pins 5 and 8 are power input terminals of the chip and connected to the DC power supply terminal, and pins 6 and 7 are signal output terminals for controlling the forward and reverse rotation of the motor. It is configured with a push-pull output mode with the I / O port of an external MCU. The motor controls the reclosing switch to close the load circuit. At the same time, the chip itself also has undervoltage and overtemperature functions to meet the requirements of smooth reclosing control.

[0008] The present invention is further configured such that the mutual inductance coil is sleeved on the neutral and live wires of the load circuit, the leakage signal module includes a leakage current signal amplifier, capacitor a, capacitor b, and capacitor c, the two sets of input terminals of the leakage current signal amplifier are electrically connected to the mutual inductance coil and grounded through capacitor a and capacitor b respectively, the regulated power supply terminal is electrically connected to the power supply terminal of the leakage current signal amplifier, the main control module is electrically connected to the output terminal of the leakage current signal amplifier, and capacitor c is electrically connected between the power supply terminal and the output terminal of the leakage current signal amplifier. The mutual inductance coil detects whether the load circuit is leaking current, the leakage signal generated by the mutual inductance coil is amplified by the leakage current signal amplifier, and the leakage current signal is transmitted from the output terminal to the main control module, which determines whether to disconnect the load circuit. Capacitors a and b are used to reduce the influence of high-frequency noise on the leakage signal module, and capacitor c is used for filtering and anti-interference to improve the stability and reliability of the circuit.

[0009] The present invention is further configured such that the sampling resistor is connected to the neutral line of the load circuit, the current acquisition module includes a total current signal amplifier, capacitors d, e, f, and g, the two input terminals of the total current signal amplifier are electrically connected to the sampling resistor and grounded through capacitors d and e respectively, the regulated power supply terminal is electrically connected to the power supply terminal of the total current signal amplifier, the main control module is electrically connected to the output terminal of the total current signal amplifier, and the output terminal of the leakage current signal amplifier is electrically connected to the power supply terminal and the input terminal with capacitors f and g respectively, the sampling resistor is a manganese copper resistor connected in series with the neutral line of the load circuit, the total current signal amplifier is connected in parallel with the manganese copper resistor and amplifies the total current signal, the total current signal is transmitted from the output terminal to the main control module, and the main control module determines whether to disconnect the load circuit, wherein capacitors d and e are used to reduce the influence of high-frequency noise on the leakage current signal module, capacitor f is used for filtering and anti-interference, improving the stability and reliability of the circuit, and capacitor g is used to isolate the transmission of DC signals to meet the current acquisition module's requirements for AC signal acquisition.

[0010] The present invention is further configured such that the temperature probes are respectively fitted onto the neutral and live wires of the load circuit to detect whether the circuit is overheating. When the circuit temperature exceeds a specified value, the main control module controls the reclosing switch to disconnect the load circuit, thereby ensuring the safety of residents' electricity use.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. The power supply circuit is divided into a working circuit for reclosing power supply and a load circuit for user use, so that the working circuit of reclosing is independent and external factors are avoided from affecting the normal operation of reclosing.

[0013] 2. The detection components, main control module, leakage signal module, current acquisition module, temperature acquisition module, tripping module, motor module and limit sensor of this utility model are all integrated into the reclosing circuit, thus integrating the reclosing function.

[0014] 3. The main control module monitors the load circuit through the leakage current signal module, current acquisition module, and temperature acquisition module. When the load circuit experiences leakage current, overcurrent, or high temperature, the trip module automatically controls the reclosing switch to disconnect the load circuit. The limit sensor detects that the reclosing switch is in the open or closed position, and the motor module controls the reclosing switch to close the load circuit again. This allows for rapid restoration of power supply after a power outage, ensuring the user's power needs are met.

[0015] The embodiments of this utility model will be further described below with reference to the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the circuit structure in this utility model;

[0017] Figure 2 This is a schematic diagram of the detection component installed on the load circuit in this utility model.

[0018] Figure 3 This is a schematic diagram of the circuit diagram of the tripping module in this utility model;

[0019] Figure 4 This is a schematic diagram of the motor module circuit diagram in this utility model;

[0020] Figure 5 This is a schematic diagram of the leakage signal module circuit in this utility model;

[0021] Figure 6 This is a schematic diagram of the circuit diagram of the current acquisition module in this utility model;

[0022] Wherein: 1-Working circuit, 2-Load circuit, 3-Power supply module, 4-Detection component, 5-Mutual inductance coil, 6-Sampling resistor, 7-Temperature probe, 8-Main control module, 9-Leakage signal module, 10-Current acquisition module, 11-Temperature acquisition module, 12-Trip module, 13-Motor module, 14-Limit sensor, 15-Trip coil, 16-Test button, 17-Leakage current signal amplifier, 18-Capacitor a, 19-Capacitor b, 20-Capacitor c, 21-Total current signal amplifier, 22-Capacitor d, 23-Capacitor e, 24-Capacitor f, 25-Capacitor g, 100-DC power supply terminal, 200-Regulated power supply terminal; Detailed Implementation

[0023] like Figure 1 , 2 As shown, this utility model provides a comprehensive detection circuit structure based on reclosing, including a working circuit 1 and a load circuit 2, as well as a power supply module 3 and a detection component 4 connected to the working circuit 1 and the load circuit 2 respectively. The detection component 4 includes a mutual inductance coil 5, a sampling resistor 6 and a temperature probe 7, and also includes a main control module 8, a leakage current signal module 9, a current acquisition module 10, a temperature acquisition module 11, a trip module 12, a motor module 13 and a limit sensor 14. The power supply module 3 is electrically connected to the main control module 8 and provides it with power. The main control module 8 is electrically connected to the mutual inductance coil 5, the sampling resistor 6 and the temperature probe 7 through the leakage current signal module 9, the current acquisition module 10 and the temperature acquisition module 11 respectively. The main control module 8 is electrically connected to the trip module 12 for controlling the on and off of the load circuit 2 and the limit sensor 14 for detecting the position of the reclosing switch.

[0024] In this embodiment, the power supply module 3 is provided with a DC power supply terminal 100 and a regulated power supply terminal 200. The DC power supply terminal 100 provides power to the motor module 13, and the regulated power supply terminal 200 provides power to the main control module 8, the leakage signal module 9 and the current acquisition module 10. The working circuit 1 converts the DC power supply terminal 100 required by the motor through a transformer, and then converts it into the regulated power supply terminal 200 required by the chip to work through a regulated power supply.

[0025] Combination Figure 3 As shown, in this embodiment, the trip module 12 is provided with a trip coil 15 for disconnecting the load circuit 2. The trip coil 15 is an electromagnet coil. The trip module 12 is electrically connected to the trip coil 15 through the TQ terminal. When the main control module 8 sends a trip command, the trip coil 15 is energized and attracts the reclosing switch, thereby controlling the reclosing switch to disconnect the load circuit 2. The trip module 12 is also provided with a test button 16 for judging whether the trip structure is normal. The trip module 12 is electrically connected to the test button 16 through the KEY terminal.

[0026] Combination Figure 4 As shown, in this embodiment, the motor module 13 is provided with a power supply terminal, a signal receiving terminal, and an output terminal for controlling the motor drive. The DC power supply terminal 100 is electrically connected to the motor module 13 through the power supply terminal and provides power. The main control module 8 is electrically connected to the motor module 13 through the signal receiving terminal. The motor module 13 is a PN7705 two-channel driver chip, where pin 1 is a fault detection port, pins 2 and 3 are signal input terminals for controlling the forward and reverse rotation of the motor, pins 5 and 8 are power input terminals of the chip and connected to the DC power supply terminal 100, and pins 6 and 7 are signal output terminals for controlling the forward and reverse rotation of the motor. It is configured with a push-pull output mode with the IO port of the external MCU. The reclosing switch is closed through the motor to close the load circuit 2. At the same time, the chip itself also has undervoltage and overtemperature functions to meet the requirements of smooth reclosing control.

[0027] Combination Figure 5As shown, in this embodiment, the mutual inductance coil 5 is mounted on the neutral and live wires of the load circuit 2. The leakage current signal module 9 includes a leakage current signal amplifier 17, capacitor a18, capacitor b19, and capacitor c20. The two input terminals of the leakage current signal amplifier 17 are pins 2 and 3, which are electrically connected to the mutual inductance coil 5 through the L_I terminal and grounded through capacitors a18 and b19 respectively. The regulated power supply terminal 200 is electrically connected to the power supply terminal of the leakage current signal amplifier 17, which is pins 4 and 5. The main control module 8 is electrically connected to the leakage current signal amplifier. The output terminal of amplifier 17 is pin 1, and a capacitor C20 is electrically connected between pin 4 and pin 1. The mutual inductance coil 5 detects whether the load circuit 2 is leaking current. The leakage current signal generated by the mutual inductance coil 5 is amplified by the leakage current signal amplifier 17. The leakage current signal is transmitted from the output terminal to the main control module 8, which determines whether to disconnect the load circuit 2. Among them, capacitors A18 and B19 are used to reduce the influence of high-frequency noise on the leakage current signal module 9, and capacitor C20 is used for filtering and anti-interference to improve the stability and reliability of the circuit.

[0028] Combination Figure 6 As shown, in this embodiment, the sampling resistor 6 is connected to the neutral line of the load circuit 2. The current acquisition module 10 includes a total current signal amplifier 21, capacitors d22, e23, f24, and g25. The two input terminals of the total current signal amplifier 21 are pins 2 and 3, which are electrically connected to the sampling resistor 6 through the R_I terminal and grounded through capacitors d22 and e23 respectively. The regulated power supply terminal 200 is electrically connected to the power supply terminal of the total current signal amplifier 21, which is pins 4 and 5. The main control module 8 is electrically connected to the output terminal of the total current signal amplifier 21. The output terminal is pin 1, and pin 1 is electrically connected to pin 4 and pin 2 respectively with capacitors f24 and g25. The sampling resistor 6 is a manganese copper resistor connected in series with the neutral line of the load circuit 2. The total current signal amplifier 21 is connected in parallel with the manganese copper resistor and amplifies the total current signal. The total current signal is transmitted from pin 1 to the main control module 8, which determines whether to disconnect the load circuit 2. Among them, capacitors d22 and e23 are used to reduce the influence of high-frequency noise on the leakage signal module 9, capacitor f24 is used for filtering and anti-interference to improve the stability and reliability of the circuit, and capacitor g25 is used to isolate the transmission of DC signals.

[0029] In this embodiment, the temperature probe 7 is respectively fitted onto the neutral wire and the live wire of the load circuit 2 to detect whether the circuit is overheating.

[0030] The working principle of this utility model is that the power supply circuit is divided into a working circuit 1 for reclosing power supply and a load circuit 2 for user use. The main control module 8 monitors the load circuit 2 through the leakage current signal module 9, the current acquisition module 10, and the temperature acquisition module 11. When the load circuit 2 is in one of the states of leakage current, overcurrent, or high temperature, the trip module 12 automatically controls the reclosing switch to disconnect the load circuit 2. The limit sensor 14 detects that the reclosing switch is in the two positions of open and closed. The motor module 13 controls the reclosing switch to close the load circuit 2 again, which can quickly restore power supply after power failure.

[0031] In addition to the above embodiments, this utility model may have other implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by this utility model.

Claims

1. A comprehensive detection circuit structure based on reclosing, comprising a working circuit (1) and a load circuit (2), and a power supply module (3) and a detection component (4) respectively connected to the working circuit (1) and the load circuit (2), wherein the detection component (4) comprises a mutual inductance coil (5), a sampling resistor (6), and a temperature probe (7), characterized in that, It also includes a main control module (8), a leakage signal module (9), a current acquisition module (10), a temperature acquisition module (11), a trip module (12), a motor module (13), and a limit sensor (14). The power supply module (3) is electrically connected to the main control module (8) and provides it with power. The main control module (8) is electrically connected to the mutual inductance coil (5), the sampling resistor (6), and the temperature probe (7) through the leakage signal module (9), the current acquisition module (10), and the temperature acquisition module (11), respectively. The main control module (8) is electrically connected to the trip module (12) and the motor module (13) for controlling the on and off of the load circuit (2), and to the limit sensor (14) for detecting the position of the reclosing switch.

2. The integrated detection circuit structure based on reclosing according to claim 1, characterized in that: The power supply module (3) is provided with a DC power supply terminal (100) and a regulated power supply terminal (200). The DC power supply terminal (100) provides power to the motor module (13), and the regulated power supply terminal (200) provides power to the main control module (8), the leakage signal module (9), and the current acquisition module (10).

3. The integrated detection circuit structure based on reclosing according to claim 2, characterized in that: The trip module (12) is provided with a trip coil (15) for disconnecting the load circuit (2).

4. The integrated detection circuit structure based on reclosing according to claim 2, characterized in that: The motor module (13) is provided with a power supply terminal, a signal receiving terminal, and an output terminal for controlling the motor drive. The DC power supply terminal (100) is electrically connected to the motor module (13) through the power supply terminal and provides power. The main control module (8) is electrically connected to the motor module (13) through the signal receiving terminal.

5. The integrated detection circuit structure based on reclosing according to claim 2, characterized in that: The mutual inductance coil (5) is fitted on the neutral and live wires of the load circuit (2). The leakage signal module (9) is equipped with a leakage current signal amplifier (17), capacitor a (18), capacitor b (19) and capacitor c (20). The two sets of input terminals of the leakage current signal amplifier (17) are electrically connected to the mutual inductance coil (5) and grounded through capacitor a (18) and capacitor b (19) respectively. The regulated power supply terminal (200) is electrically connected to the power supply terminal of the leakage current signal amplifier (17). The main control module (8) is electrically connected to the output terminal of the leakage current signal amplifier (17), and capacitor c (20) is electrically connected between the power supply terminal and the output terminal of the leakage current signal amplifier (17).

6. The integrated detection circuit structure based on reclosing according to claim 2, characterized in that: The sampling resistor (6) is connected to the neutral line of the load circuit (2). The current acquisition module (10) includes a total current signal amplifier (21), capacitor d (22), capacitor e (23), capacitor f (24) and capacitor g (25). The two sets of input terminals of the total current signal amplifier (21) are electrically connected to the sampling resistor (6) and grounded through capacitor d (22) and capacitor e (23) respectively. The regulated power supply terminal (200) is electrically connected to the power supply terminal of the total current signal amplifier (21). The main control module (8) is electrically connected to the output terminal of the total current signal amplifier (21), and the output terminal of the leakage current signal amplifier (17) is electrically connected to the power supply terminal and the input terminal with capacitor f (24) and capacitor g (25) respectively.

7. The integrated detection circuit structure based on reclosing according to claim 2, characterized in that: The temperature probe (7) is respectively fitted onto the neutral wire and the live wire of the load circuit (2).

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