阅读说明：本技术 一种断路器的控制检测系统 (Control detection system of circuit breaker ) 是由 李国玉 王竞 邹伟华 于 2021-08-09 设计创作，主要内容包括：本发明公开了一种断路器的控制检测系统,包括主驱动模块、信号调理模块、电源模块、分合闸控制电路及分合闸电流采集电路；电源模块用于为不同的耗电模块供电；主驱动模块用于接收并处理外部信号,并根据处理结果向分合闸控制电路发出控制信号；分合闸控制电路用于在接收到分闸控制信号或合闸控制信号时,控制断路器对应地完成分闸或合闸；分合闸电流采集电路用于采集分合闸控制电路在分闸或合闸过程中的电流信息,并将采集到的电流信息传输至主驱动模块；主驱动模块还用于将采集到的电流信息传输至信号调理模块以进行后续处理,信号调理模块用于对采集到的电流信息进行处理分析并上传至上位机,以实时监测分闸或合闸时的电流波形。(The invention discloses a control detection system of a circuit breaker, which comprises a main driving module, a signal conditioning module, a power supply module, a switching-on and switching-off control circuit and a switching-on and switching-off current acquisition circuit, wherein the main driving module is connected with the signal conditioning module; the power supply module is used for supplying power to different power consumption modules; the main driving module is used for receiving and processing external signals and sending control signals to the switching-on and switching-off control circuit according to processing results; the switching-on and switching-off control circuit is used for controlling the circuit breaker to correspondingly complete switching-on and switching-off when receiving a switching-on control signal or a switching-off control signal; the switching-on and switching-off current acquisition circuit is used for acquiring current information of the switching-on and switching-off control circuit in the switching-on and switching-off process and transmitting the acquired current information to the main driving module; the main driving module is also used for transmitting the collected current information to the signal conditioning module for subsequent processing, and the signal conditioning module is used for processing and analyzing the collected current information and uploading the current information to an upper computer so as to monitor the current waveform in switching-off or switching-on in real time.)

1. A control detection system of a circuit breaker is characterized by comprising a main driving module (1), a signal conditioning module (2), a power supply module (3), a switching-on and switching-off control circuit (5) and a switching-on and switching-off current acquisition circuit (6);

the power supply module (3) is used for converting external power supply into different voltage signals so as to respectively supply power to different power consumption modules;

the main driving module (1) is electrically connected with the switching-on and switching-off control circuit (5), and the main driving module (1) is used for receiving and processing external signals and sending control signals to the switching-on and switching-off control circuit (5) according to processing results;

the switching-on and switching-off control circuit (5) is used for controlling the circuit breaker to correspondingly complete switching-on and switching-off when receiving a switching-on and switching-off control signal or a switching-on control signal sent by the main driving module (1);

the switching-on and switching-off current acquisition circuit (6) is respectively electrically connected with the switching-on and switching-off control circuit (5) and the main driving module (1), and the switching-on and switching-off current acquisition circuit (6) is used for acquiring current information of the switching-on and switching-off control circuit (5) in a switching-off or switching-on process and transmitting the acquired current information to the main driving module (1);

the signal conditioning module (2) is electrically connected with the main driving module (1), the main driving module (1) is further used for transmitting the collected current information to the signal conditioning module (2) for subsequent processing, and the signal conditioning module (2) is used for processing and analyzing the collected current information and uploading the processed current information to an upper computer so as to monitor the current waveform during switching-off or switching-on in real time.

2. The control detection system of a circuit breaker according to claim 1, characterized in that it further comprises a pulse trip circuit (4) electrically connected to said main drive module (1);

the main driving module (1) is also used for receiving and processing external signals and sending pulse tripping control signals to the pulse tripping circuit (4) according to the processing result;

the pulse tripping circuit (4) is used for controlling the circuit breaker to complete pulse tripping when receiving a pulse tripping control signal sent by the main driving module (1).

3. The control detection system of a circuit breaker according to claim 1, characterized in that it further comprises a temperature sensor (7) and a vibration sensor (8) electrically connected to said signal conditioning module (2);

the temperature sensor (7) and the vibration sensor (8) are respectively used for detecting the temperature information and the vibration information of the circuit breaker and transmitting the detection results to the signal conditioning module (2);

the signal conditioning module (2) is also used for processing and analyzing the detected temperature information and vibration information so as to monitor the temperature and vibration condition of the circuit breaker in real time.

4. The control detection system of a circuit breaker according to claim 1, characterized in that the opening and closing current collection circuit (6) comprises a Hall sensor (U1), a sampling resistor (R1) and an anti-reverse diode (V1);

the Hall sensor (U1) is provided with an input end, an output end and a sampling end;

the anode of the reverse connection prevention diode (V1) is connected with the anode of a first direct current power supply, and the cathode of the reverse connection prevention diode (V1) is connected with the input end of the Hall sensor (U1);

the output end of the Hall sensor (U1) is respectively connected with one end of each opening coil and one end of each closing coil of the circuit breaker, and the other end of each opening coil and the other end of each closing coil of the circuit breaker are connected with the negative electrode of the first direct-current power supply through a switching device;

when the switching device is switched on to enable an opening coil or a closing coil of the circuit breaker to be electrified, the sampling end of the Hall sensor (U1) can output induction current according to a certain proportion, and the induction current is transmitted to the signal conditioning module (2) to realize the collection of opening and closing current;

the sampling end of the Hall sensor (U1) is also grounded through the sampling resistor (R1).

5. The control detection system of the circuit breaker according to claim 4, characterized in that the Hall sensor (U1) is LA25-NP, and the sampling end of the Hall sensor (U1) outputs induction current according to the ratio of 1000: 1;

the first direct-current power supply is a 110V direct-current power supply; the Hall sensor (U1) is further provided with two power supply input ends, the two power supply input ends are respectively connected with the positive electrode and the negative electrode of a 15V direct-current power supply, the positive electrode and the negative electrode of the 15V direct-current power supply are further respectively connected with one end of a first capacitor (C1) and one end of a second capacitor (C2), and the other ends of the first capacitor (C1) and the second capacitor (C2) are grounded.

6. The control detection system of a circuit breaker according to claim 5, characterized in that said opening and closing current collection circuit (6) further comprises a third capacitor (C3), a first voltage dependent resistor (R2), a third resistor (R3), a fourth resistor (R4), a fifth resistor (R5) and a bidirectional transient diode (D1);

the third capacitor (C3) is connected with the piezoresistor in parallel, one end of the third capacitor (C3) and one end of the first piezoresistor (R2) are both connected with the cathode of the anti-reverse diode (V1), and the other ends are both connected with the cathode of a first direct current power supply;

one end of the third resistor (R3) is connected with the cathode of the reverse connection prevention diode (V1), and the other end of the third resistor (R3) is respectively connected with one end of a fourth resistor (R4), a fifth resistor (R5) and one end of a bidirectional transient diode (D1);

the other ends of the fourth resistor (R4) and the bidirectional transient diode (D1) are connected with the negative pole of the first direct current power supply;

the quantity of the reverse connection prevention diodes (V1) is two, and the two reverse connection prevention diodes (V1) are connected in parallel.

7. The control detection system of the circuit breaker according to claim 4, characterized in that the switching-on and switching-off control circuit (5) comprises a switching-on control circuit and a switching-off control circuit with the same structure;

the switching-on control circuit comprises a photoelectric coupler (D3), a driving chip (D2) and a switching tube (V6);

the photoelectric coupler (D3) comprises a light-emitting LED at the front stage and a photosensitive tube at the rear stage;

the driving chip (D2) is provided with an input end and an output end, and the output end outputs high level when the input end of the driving chip (D2) is connected with low level;

the switch tube (V6) is provided with a switch control end at the front stage and two ends at the rear stage, and when the switch control end of the switch tube (V6) is connected with a high level, the two ends at the rear stage of the switch tube (V6) are conducted;

the anode of the light-emitting LED is connected with a high level, and the cathode of the light-emitting LED is connected with the main driving module (1) and serves as a control signal input end;

one end of the photosensitive tube is connected with the cathode of a first direct current power supply, and the other end of the photosensitive tube is respectively connected with a high level and the input end of the driving chip (D2);

the output end of the driving chip (D2) is connected with the switch control end of the switch tube (V6);

two ends of the rear stage of the switching tube (V6) are respectively connected with the negative electrode of the first direct-current power supply and one end of a closing coil of the circuit breaker;

the other end of the closing coil of the circuit breaker is connected with the output end of the Hall sensor (U1);

the circuit structure of the opening control circuit is the same as that of the closing control circuit.

8. The control detection system of circuit breaker according to claim 7, characterized in that the anode of said light emitting LED is connected high through a sixth resistor (R6);

the input end of the driving chip (D2) is connected with high level through a seventh resistor (R7);

the output end of the driving chip (D2) is connected with the switch control end of the switch tube (V6) through an eighth resistor (R8).

9. The control detection system of a circuit breaker according to claim 8, characterized in that the closing control circuit further comprises two second diodes (V2), two third diodes (V3), a fourth diode (V4), a fifth diode (V5), a fourth capacitor (C4), a ninth resistor (R9) and a second piezoresistor (R10);

the two second diodes (V2) are both arranged at two ends of a closing coil of the circuit breaker in parallel;

the two third diodes (V3) and the second piezoresistor (R10) are arranged at two ends of the rear stage of the switching tube (V6) in parallel, and anodes of the two third diodes (V3) are connected with the negative electrode of the first direct-current power supply;

the ninth resistor (R9) is connected in parallel with the fourth diode (V4), the anode of the fourth diode (V4) is connected with the cathode of the third diode (V3), the cathode of the fourth diode (V4) is connected with one end of a fourth capacitor (C4), and the other end of the fourth capacitor (C4) is connected with the negative electrode of the first direct-current power supply;

the anode of the fifth diode (V5) is connected with the cathode of the first direct current power supply, and the cathode of the fifth diode (V5) is connected with the switch control end of the switch tube (V6).

10. The control and detection system of a circuit breaker according to claim 9, characterized in that said photocoupler (D3) employs a TLP187 chip; the driving chip (D2) adopts an MC33153 chip.

Technical Field

The invention relates to the field of switch equipment, in particular to a control detection system of a circuit breaker.

Background

In a rail transit power supply system, the role of a direct current breaker is very important. The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time. The circuit breaker can be used for distributing electric energy and protecting a power supply line, a motor and the like, and the operation performance of the circuit breaker is important to the safety and stability of a power grid. When a fault occurs in the system, the circuit breaker can quickly cut off a fault mechanism in the system or cut off the power supply of the whole power supply so as to prevent the fault from being enlarged and avoid causing huge economic loss and casualties.

However, in the prior art, the reliability of the breaker in control is difficult to guarantee, and means for detecting the relevant performance of the breaker is lacking, so that the reliability of the breaker is difficult to evaluate, and the remaining life of the breaker is difficult to predict, so that the breaker can be repaired or replaced in time. The power department of China sets standards related to the service life of electrical equipment, and the service life of the electrical equipment is set according to the design life of the electrical equipment and has certain limitations; the circuit breakers of the same model and the same batch are influenced by different use environments.

Disclosure of Invention

In order to solve the problems of the background art, the present invention provides a control detection system for a circuit breaker.

In order to achieve the purpose, the invention adopts the technical scheme that:

a control detection system of a circuit breaker comprises a main driving module, a signal conditioning module, a power supply module, a switching-on and switching-off control circuit and a switching-on and switching-off current acquisition circuit;

the power supply module is used for converting external power supply into different voltage signals so as to respectively supply power to different power consumption modules;

the main driving module is electrically connected with the switching-on and switching-off control circuit and is used for receiving and processing external signals and sending control signals to the switching-on and switching-off control circuit according to processing results;

the switching-on and switching-off control circuit is used for controlling the circuit breaker to correspondingly complete switching-on and switching-off when receiving a switching-on and switching-off control signal or a switching-on control signal sent by the main driving module;

the switching-on and switching-off current acquisition circuit is respectively electrically connected with the switching-on and switching-off control circuit and the main driving module, and is used for acquiring current information of the switching-on and switching-off control circuit in a switching-on or switching-off process and transmitting the acquired current information to the main driving module;

the signal conditioning module is electrically connected with the main driving module, the main driving module is also used for transmitting the collected current information to the signal conditioning module for subsequent processing, and the signal conditioning module is used for processing and analyzing the collected current information and uploading the current information to an upper computer so as to monitor the current waveform during switching-off or switching-on in real time.

In some embodiments, the pulse tripping circuit is electrically connected with the main driving module;

the main driving module is also used for receiving and processing external signals and sending pulse tripping control signals to the pulse tripping circuit according to the processing result;

the pulse tripping circuit is used for controlling the circuit breaker to complete pulse tripping when receiving a pulse tripping control signal sent by the main driving module.

In some embodiments, the system further comprises a temperature sensor and a vibration sensor electrically connected with the signal conditioning module;

the temperature sensor and the vibration sensor are respectively used for detecting the temperature information and the vibration information of the circuit breaker and transmitting the detection result to the signal conditioning module;

the signal conditioning module is also used for processing and analyzing the detected temperature information and vibration information so as to monitor the temperature and vibration condition of the circuit breaker in real time.

In some embodiments, the switching-on/off current collecting circuit includes a hall sensor U1, a sampling resistor R1 and an anti-reverse diode V1;

the Hall sensor U1 is provided with an input end, an output end and a sampling end;

the anode of the reverse connection prevention diode V1 is connected with the anode of a first direct current power supply, and the cathode of the reverse connection prevention diode V1 is connected with the input end of the Hall sensor U1;

the output end of the Hall sensor U1 is respectively connected with one end of each opening coil and one end of each closing coil of the circuit breaker, and the other end of each opening coil and the other end of each closing coil of the circuit breaker are connected with the negative electrode of the first direct current power supply through a switching device;

when the switching device is switched on to enable an opening coil or a closing coil of the circuit breaker to be electrified, the sampling end of the Hall sensor U1 can output induced current according to a certain proportion, and the induced current is transmitted to the signal conditioning module to realize the collection of opening and closing current;

the sampling end of the Hall sensor U1 is also grounded through the sampling resistor R1.

In some embodiments, the hall sensor U1 is model LA25-NP, and the sampling end of the hall sensor U1 outputs an induced current in a ratio of 1000: 1;

the first direct-current power supply is a 110V direct-current power supply; the Hall sensor U1 also has two power supply input ends, two power supply input ends connect positive pole and negative pole of 15V's DC power supply respectively, and the DC power supply positive pole and the negative pole of 15V still are connected with the one end of first electric capacity C1 and second electric capacity C2 respectively, and the other end of first electric capacity C1 and second electric capacity C2 is ground.

In some embodiments, the switching-on/off current collecting circuit further comprises a third capacitor C3, a first voltage dependent resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a bidirectional transient diode D1;

the third capacitor C3 is connected with the piezoresistor in parallel, one end of the third capacitor C3 and one end of the first piezoresistor R2 are both connected with the cathode of the anti-reverse diode V1, and the other ends are both connected with the cathode of the first direct current power supply;

one end of the third resistor R3 is connected with the cathode of the anti-reverse diode V1, and the other end is respectively connected with one end of a fourth resistor R4, a fifth resistor R5 and a bidirectional transient diode D1;

the other ends of the fourth resistor R4 and the bidirectional transient diode D1 are connected with the cathode of the first direct current power supply;

the quantity of the reverse connection prevention diodes V1 is two, and the two reverse connection prevention diodes V1 are connected in parallel.

In some embodiments, the switching-on and switching-off control circuit comprises a switching-on control circuit and a switching-off control circuit which have the same structure;

the switching-on control circuit comprises a photoelectric coupler D3, a driving chip D2 and a switching tube V6;

the photoelectric coupler D3 comprises a light-emitting LED at the front stage and a photosensitive tube at the rear stage;

the driving chip D2 has an input end and an output end, and when the input end of the driving chip D2 is connected with a low level, the output end outputs a high level;

the switch tube V6 has a switch control end at the front stage and two ends at the rear stage, and when the switch control end of the switch tube V6 is connected with a high level, the two ends at the rear stage of the switch tube V6 are conducted;

the anode of the luminous LED is connected with a high level, and the cathode of the luminous LED is connected with the main driving module and serves as a control signal input end;

one end of the photosensitive tube is connected with the cathode of a first direct current power supply, and the other end of the photosensitive tube is respectively connected with a high level and the input end of the driving chip D2;

the output end of the driving chip D2 is connected with the switch control end of the switch tube V6;

two ends of the rear stage of the switching tube V6 are respectively connected with the negative electrode of the first direct-current power supply and one end of a closing coil of the circuit breaker;

the other end of the closing coil of the circuit breaker is connected with the output end of the Hall sensor U1;

the circuit structure of the opening control circuit is the same as that of the closing control circuit.

In some embodiments, the anode of the light emitting LED is connected to a high level through a sixth resistor R6;

the input end of the driving chip D2 is connected with high level through a seventh resistor R7;

the output end of the driving chip D2 is connected with the switch control end of the switch tube V6 through an eighth resistor R8.

In some embodiments, the closing control circuit further includes two second diodes V2, two third diodes V3, a fourth diode V4, a fifth diode V5, a fourth capacitor C4, a ninth resistor R9, and a second piezoresistor R10;

the two second diodes V2 are both arranged at two ends of a closing coil of the circuit breaker in parallel;

the two third diodes V3 and the second piezoresistor R10 are both arranged at two rear ends of the switching tube V6 in parallel, and anodes of the two third diodes V3 are both connected with the negative electrode of the first direct-current power supply;

the ninth resistor R9 is connected in parallel with the fourth diode V4, the anode of the fourth diode V4 is connected with the cathode of the third diode V3, the cathode of the fourth diode V4 is connected with one end of the fourth capacitor C4, and the other end of the fourth capacitor C4 is connected with the cathode of the first direct-current power supply;

the anode of the fifth diode V5 is connected to the negative electrode of the first dc power supply, and the cathode of the fifth diode V5 is connected to the switching control terminal of the switching tube V6.

In some embodiments, the optoelectronic coupler D3 is a TLP187 chip; the driving chip D2 adopts an MC33153 chip.

Compared with the prior art, the invention has the beneficial effects that:

the control detection system of the circuit breaker can be used for driving the mechanism of the circuit breaker to act, collecting and uploading state data of the circuit breaker for analysis, realizing intelligent functions such as multi-angle state monitoring, fault diagnosis and the like, and being beneficial to establishing a life cycle health management system scheme; and the modularization and the integration of products are realized, and each module can be integrated and arranged in a control box of the circuit breaker.

Drawings

Fig. 1 is a schematic diagram of module connection of a control detection system of a circuit breaker according to the present invention;

FIG. 2 is a circuit schematic diagram of a closing control circuit;

fig. 3 is a circuit schematic diagram of the switching-on/off current collecting circuit.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the following description further explains how the invention is implemented by combining the attached drawings and the detailed implementation modes.

Referring to fig. 1, the invention provides a control detection system of a circuit breaker, which comprises a main driving module 1, a signal conditioning module 2, a power module 3, a switching-on/off control circuit 5 and a switching-on/off current acquisition circuit 6; the power supply module 3 is used for converting external power supply into different voltage signals so as to respectively supply power to different power consumption modules; the main driving module 1 is electrically connected with the switching-on and switching-off control circuit 5, and the main driving module 1 is used for receiving and processing external signals and sending control signals to the switching-on and switching-off control circuit 5 according to processing results; the switching-on/off control circuit 5 is used for controlling the circuit breaker to correspondingly complete switching-on or switching-off when receiving a switching-on or switching-off control signal sent by the main drive module 1; the opening and closing current collecting circuit 6 is respectively electrically connected with the opening and closing control circuit 5 and the main driving module 1, and the opening and closing current collecting circuit 6 is used for collecting current information of the opening and closing control circuit 5 in the opening or closing process and transmitting the collected current information to the main driving module 1; the signal conditioning module 2 is electrically connected with the main driving module 1, the main driving module 1 is also used for transmitting the collected current information to the signal conditioning module 2 for subsequent processing, and the signal conditioning module 2 is used for processing and analyzing the collected current information and uploading the processed current information to an upper computer so as to monitor the current waveform during switching-off or switching-on in real time.

Further, the control detection system of the circuit breaker also comprises a pulse tripping circuit 4 electrically connected with the main driving module 1; the main driving module 1 is also used for receiving and processing external signals and sending pulse tripping control signals to the pulse tripping circuit 4 according to the processing result; the pulse tripping circuit 4 is used for controlling the circuit breaker to complete pulse tripping when receiving a pulse tripping control signal sent by the main driving module 1.

Specifically, the pulse tripping circuit 4 is matched with a pulse tripper and used for rapidly opening the circuit breaker under the fault working condition. The pulse release is composed of a pulse coil, a gasket, a repulsive force disc and a transmission lever assembly. The pulse release is powered by a capacitor on the pulse release circuit 4. The principle of pulse tripping is as follows: when an external protection device detects fault current, a pulse tripping command is sent to the circuit breaker, the main driving module 1 introduces the command and sends a pulse tripping control signal to the pulse tripping circuit 4, the pre-charged capacitor discharges to the pulse tripping coil, a rapidly changing magnetic field is generated on the pulse tripping coil, an induced eddy current can appear on a repulsion plate of the pulse tripping device, the rapid tripping buckle is impacted through a transmission lever at an extremely high speed under the action of the magnetic field, the balance of the mechanism is broken, and the opening operation of the circuit breaker is completed.

Further, the control detection system of the circuit breaker further comprises a temperature sensor 7 and a vibration sensor 8 which are electrically connected with the signal conditioning module 2; the temperature sensor 7 and the vibration sensor 8 are respectively used for detecting the temperature information and the vibration information of the circuit breaker and transmitting the detection result to the signal conditioning module 2; the signal conditioning module 2 is also used for processing and analyzing the detected temperature information and vibration information so as to monitor the temperature and vibration condition of the circuit breaker in real time. According to the invention, the temperature sensor 7 and the vibration sensor 8 are arranged, relevant characteristic data of the circuit breaker are collected and uploaded to the upper computer, and whether the characteristic of the circuit breaker is degraded or not and the degradation degree can be accurately judged through calculation and analysis.

In a specific embodiment, each module in the control detection system of the circuit breaker can be integrated in a control box of the circuit breaker, an ethernet interface is integrated in the control box, direct communication of ethernet can be supported, an external serial port is reserved, and serial port communication can also be supported. The power module 3 can convert the external direct current 110V power supply into 5V, 15V, +/-15V and 3.3V signals used by different units; part of the units directly use direct current 110V electricity. An STM8 chip can be adopted in the main driving module 1, and can receive switching-off, switching-on and pulse tripping signals output by an external protection device and control corresponding circuits to complete corresponding functions after processing; in addition, the main driving module 1 can also collect coil current in opening and closing, and transmit the coil current to the signal conditioning module 2 for subsequent processing. An STM32 chip can be adopted in the signal conditioning module 2, and the signal conditioning module 2 can store breaker opening and closing currents, breaker opening and closing vibration waveforms and breaker real-time temperature data which are collected by the main driving module 1, the vibration sensor 8 and the temperature sensor 7; in addition, the signal conditioning module 2 also has a network port uploading function, and can upload the data to an upper PC in real time.

Further referring to fig. 2, the switching-on/off current collecting circuit 6 includes a hall sensor U1, a sampling resistor R1, and an anti-reverse diode V1; the Hall sensor U1 is provided with an input end, an output end and a sampling end; the anode of the reverse connection prevention diode V1 is connected with the anode of the first direct current power supply, and the cathode of the reverse connection prevention diode V1 is connected with the input end of the Hall sensor U1; the output end of the hall sensor U1 is connected to one end of each opening coil and closing coil of the circuit breaker, respectively, and the other end of each opening coil and closing coil of the circuit breaker is connected to the negative electrode of the first direct current power supply through a switching device (the switching device may be a switching tube V6 in fig. 3); when the switching device is switched on to enable the opening coil or the closing coil of the circuit breaker to be electrified, the sampling end of the Hall sensor U1 can output induction current according to a certain proportion, and the induction current is transmitted to the signal conditioning module 2 to realize the collection of opening and closing current; the sampling end of the Hall sensor U1 is also grounded through a sampling resistor R1.

Preferably, the Hall sensor U1 is LA25-NP, and the sampling end of the Hall sensor U1 outputs induction current according to the ratio of 1000: 1.

Further, the first direct current POWER supply adopts a 110V direct current POWER supply, the anode of the first direct current POWER supply is represented as 110POWER in FIG. 2, and the cathode of the first direct current POWER supply is represented as DC 110-; the DC110+ represents the voltage at the output end of the Hall sensor U1, and the DC110+ end is directly connected with one end of a switching-on/off coil of the circuit breaker; it is understood that the hall sensor U1 is used for sampling, and the voltage at the input and output terminals thereof hardly changes, and the DC110+ and 110POWER are shown only for distinguishing the two different terminals.

The external power supply is input by a 1 st pin of a LA25-NP Hall sensor U1, and output by a 6 th pin, wherein pins 2 to 5 can be connected with the 1 st pin, and pins 7 to 10 can be connected with the 6 th pin; the 11 th pin is used as a sampling end, the current is converted into a low-voltage analog signal after being sampled, the low-voltage analog signal is output by an Ai + end in the figure and can be collected by the signal conditioning module 2 and processed in real time; the LA25-NP hall sensor U1 further has two power supply input terminals, namely a 12 th pin and a 13 th pin, the two power supply input terminals are respectively connected to a positive electrode and a negative electrode of a 15V dc power supply generated by the power module 3, the positive electrode and the negative electrode of the 15V dc power supply are further respectively connected to one ends of the first capacitor C1 and the second capacitor C2, and the other ends of the first capacitor C1 and the second capacitor C2 are grounded.

Preferably, the switching-on/off current collecting circuit 6 further includes a third capacitor C3, a first voltage dependent resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a bidirectional transient diode D1; the third capacitor C3 is connected with the piezoresistor in parallel, one end of the third capacitor C3 and one end of the first piezoresistor R2 are both connected with the cathode of the reverse connection prevention diode V1, and the other end of the third capacitor C3 and the other end of the first piezoresistor R2 are both connected with the cathode of the first direct current power supply; one end of the third resistor R3 is connected with the cathode of the anti-reverse diode V1, and the other end is respectively connected with one end of the fourth resistor R4, one end of the fifth resistor R5 and one end of the bidirectional transient diode D1; the other ends of the fourth resistor R4 and the bidirectional transient diode D1 are connected with the cathode of the first direct current power supply; the other end of the fifth resistor R5, the Uin + end in the figure, may be connected to an external voltage acquisition circuit.

In addition, the quantity of the reverse connection prevention diodes V1 is two, the two reverse connection prevention diodes V1 are connected in parallel, and the reverse connection prevention diode V1 can effectively avoid the burning of a rear-stage circuit caused by reverse connection of a power supply. The third capacitor C3 may be a film capacitor with a rated voltage of 400V for noise filtering. The piezoresistor R2 is used for protecting the rear-stage circuit. The bidirectional transient diode D1 may be model SMBJ15 CA.

According to the switching-on and switching-off current acquisition circuit 6, the Hall sensor is connected in series to the switching-on and switching-off loop, the protection filter structure is additionally arranged in the circuit, the switching-on and switching-off current waveform can be acquired and monitored in real time, and the acquisition sensitivity is high and the safety is good.

Further, the switching-on and switching-off control circuit 5 includes a switching-on control circuit and a switching-off control circuit having the same structure.

Referring to fig. 3, the closing control circuit includes a photocoupler D3, a driving chip D2, and a switching tube V6; the photocoupler D3 includes a light-emitting LED at the front stage and a photosensitive tube at the rear stage; the driving chip D2 has an input end and an output end, and when the input end of the driving chip D2 is connected with a low level, the output end outputs a high level; the switch tube V6 has a switch control end of a front stage and two ends of a rear stage, and when the switch control end of the switch tube V6 is connected with a high level, the two ends of the rear stage of the switch tube V6 are conducted; the anode of the luminous LED is connected with a high level, and the cathode of the luminous LED is connected with the main driving module 1 and serves as a control signal input end; one end of the photosensitive tube is connected with the cathode of the first direct current power supply, and the other end of the photosensitive tube is respectively connected with the high level and the input end of the driving chip D2; the output end of the driving chip D2 is connected with the switch control end of the switch tube V6; two ends of the rear stage of the switching tube V6 are respectively connected with the negative electrode of the first direct-current power supply and one end of a closing coil of the circuit breaker; the other end of the closing coil of the circuit breaker is connected with the output end of the Hall sensor U1.

The circuit structures of the opening control circuit and the closing control circuit are the same, the difference is that the opening control circuit is matched with the opening coil, the matching mode is the same, and the specific structure of the opening control circuit is not described again.

Preferably, the anode of the light emitting LED is connected to a high level through a sixth resistor R6; the input end of the driving chip D2 is connected with high level through a seventh resistor R7; the output end of the driving chip D2 is connected to the switch control end of the switching tube V6 through an eighth resistor R8.

Preferably, the closing control circuit further includes two second diodes V2, two third diodes V3, a fourth diode V4, a fifth diode V5, a fourth capacitor C4, a ninth resistor R9, and a second piezoresistor R10; the two second diodes V2 are both arranged at two ends of a closing coil of the circuit breaker in parallel; the two third diodes V3 and the second piezoresistor R10 are both arranged at two ends of the rear stage of the switching tube V6 in parallel, and anodes of the two third diodes V3 are both connected with the negative electrode of the first direct-current power supply; the ninth resistor R9 is connected in parallel with the fourth diode V4, the anode of the fourth diode V4 is connected with the cathode of the third diode V3, the cathode of the fourth diode V4 is connected with one end of the fourth capacitor C4, and the other end of the fourth capacitor C4 is connected with the cathode of the first direct-current power supply; the anode of the fifth diode V5 is connected to the negative electrode of the first dc power supply, and the cathode of the fifth diode V5 is connected to the switching control terminal of the switching tube V6.

In one embodiment, the optocoupler D3 employs a TLP187 chip; the driver chip D2 is an MC33153 chip. The MC33153 chip has 8 pins, the 4 th pin is the input end, the 5 th pin is the output end, the 1 st pin, the 2 nd pin, the 3 rd pin, the 8 th pin all connect the first direct current power negative pole, the sixth pin connects one end of high level and second electric capacity C2 respectively, another end termination first direct current power negative pole of second electric capacity C2.

In fig. 3, CLOSE _ CMD indicates a closing control signal input terminal, and is connected to the main driving module 1; the DC 110-and the DC110+ in the graph of FIG. 2 and FIG. 3 are connected, and the closing coil is connected between the DC110+ and the CLOSE-in the graph of FIG. 3; VDD is an external high level signal, which may be 3.3V, for example; the specific types and values of the capacitors and resistors in fig. 2 and 3 can be selected according to actual needs.

The working principle of the switching-on control circuit is as follows:

before closing, the two ends of the rear stage of the switching tube V6 are disconnected, the closing coil cannot be electrified, and the structures of a second diode V2, a third diode V3, a fourth diode V4, a fifth diode V5, a fourth capacitor C4, a ninth resistor R9, a second piezoresistor R10 and the like in the circuit play a protection role.

When switching on, the main driving module 1 inputs a switching-on control signal from a control signal input terminal CLOSE _ CMD, so that a corresponding pin is changed from a high level to a low level, a voltage difference occurs at two ends of a front-stage light-emitting LED in a photoelectric coupler D3, the light-emitting LED is switched on and emits light, and a rear-stage photosensitive tube is switched on; after the photosensitive tube is conducted, the input end of the driving chip D2 is changed into low level, so that the output end outputs high level, and the output high level is used for driving the switch tube V6; therefore, two ends of the rear stage of the switching tube V6 are conducted, namely, the CLOSE-and the DC 110-in fig. 3 are conducted, so that a voltage difference of 110V appears at two ends of the closing coil, the closing coil is electrified, and the closing electromagnet is driven to CLOSE the circuit breaker.

The working principle of the opening control circuit is the same as that of the closing control circuit, and the details are not repeated herein.

The opening and closing control circuit 5 can quickly and accurately realize opening and closing according to requirements, and a multiple protection structure is arranged in the circuit, so that the safety in the opening and closing process is greatly improved, the fault in the circuit breaker is avoided, and the service life of the circuit breaker is prolonged.

In conclusion, the control detection system of the circuit breaker can be used for driving the mechanism of the circuit breaker to act, collecting and uploading state data of the circuit breaker for analysis, realizing intelligent functions such as multi-angle state monitoring and fault diagnosis, and being beneficial to establishing a life cycle health management system scheme; and the modularization and the integration of products are realized, and each module can be integrated and arranged in a control box of the circuit breaker.

Finally, the above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, which should be covered by the claims of the present invention.