A residual current circuit breaker quality batch detection system, apparatus and method

Abstract

The application relates to a residual current circuit breaker quality batch detection system, equipment and method. A residual current circuit breaker quality batch detection system comprises a control module, a zero sequence power supply and multiple detection modules; each detection module comprises a phase sequence power supply and a switch state detection unit; the phase sequence power supply is connected with three-phase inlet terminals of a circuit breaker, and the switch state detection unit is connected with three-phase outlet terminals of the circuit breaker; multiple circuit breakers to be detected are connected with an output end of the zero sequence power supply in series through respective zero sequence lines; and the control module is connected with the circuit breaker, the phase sequence power supply, the switch state detection unit and the zero sequence power supply. The batch detection system provided by the application can realize simultaneous detection of multiple circuit breakers without increasing the zero sequence power supply, improve the detection efficiency and be convenient and fast.

Description

TECHNICAL FIELD

[0001] The present application relates to electronic product detection, in particular to a residual current circuit breaker quality batch detection system, device and method. BACKGROUND

[0002] Residual current circuit breakers are widely used in low-voltage power distribution applications, and their production is huge. The traditional production and inspection of residual current circuit breakers can only be detected one by one. If batch detection is to be realized, the number of detection sources needs to be increased, or the production needs to be switched one by one, resulting in huge investment in production detection devices and low detection efficiency.

[0003] The existing residual current circuit breaker is provided with a three-phase voltage signal for the circuit breaker to work normally by a driving power supply. A constant current source is used to simulate a residual current signal to test the residual current protection function of the circuit breaker. If multiple circuit breakers need to be tested at the same time, a driving power supply and a constant current source need to be configured for each circuit breaker. Therefore, the device cost is very high. If single detection is used, the production time is too long and the efficiency is too low.

[0004] The patent document with the application number CN201510723954.X discloses a UHVDC transmission simulation system, which simulates and analyzes the UHVDC transmission system, fully utilizes various real-time simulation resources of the current simulation center, selects AC / DC system model to build the system model, establishes the UHVDC transmission control system and the control mode, analyzes the transmission limit capability, and simulates the UHVDC transmission to simulate the converter valve and control protection of the DC system in detail and correctly reflects the operation condition of the DC system. However, it cannot effectively solve the above problems.

[0005] Therefore, the existing circuit breaker testing technology has defects and needs to be improved and improved. SUMMARY

[0006] In view of the deficiencies of the prior art described above, the purpose of the present application is to provide a residual current circuit breaker quality batch detection system, device and method to solve the technical problems mentioned in the background art.

[0007] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0008] A residual current circuit breaker quality batch detection system, comprising a control module, a zero sequence power supply and a plurality of detection modules;

[0009] Each of the detection modules comprises a phase sequence power supply and a switch state detection unit; the phase sequence power supply is connected with the three-phase incoming line end of the circuit breaker, and the switch state detection unit is connected with the three-phase outgoing line end of the circuit breaker;

[0010] A plurality of to-be-detected circuit breakers are connected in series through respective zero sequence lines and connected to an output end of the zero sequence power supply;

[0011] The control module is connected with the circuit breaker, the phase sequence power supply, the switch state detection unit, and the zero sequence power supply, respectively.

[0012] Preferably, in the residual current circuit breaker quality batch detection system, the control module is in communication connection with the circuit breaker, so as to realize:

[0013] Driving instructions are sent to a plurality of circuit breakers, and the operating states of the respective circuit breakers are collected;

[0014] The opening and closing states of the circuit breakers are acquired, and it is determined whether the circuit breakers are qualified in cooperation with the operating states.

[0015] Preferably, in the residual current circuit breaker quality batch detection system, the zero sequence power supply generates an analog residual current signal and inputs the analog residual current signal into a plurality of circuit breakers connected in series, so as to realize:

[0016] The residual current signal input into the plurality of circuit breakers is controlled, and the circuit breakers determine their operating states according to the residual current values flowing therethrough; the operating states at least include opening and closing information and residual current information;

[0017] The operating states of the respective circuit breakers are acquired through the switch state detection unit, and it is determined whether the circuit breakers are qualified.

[0018] Preferably, in the residual current circuit breaker quality batch detection system, the phase sequence power supply outputs commercial power to the outside, simulating a normal power distribution working environment of the circuit breaker.

[0019] Preferably, in the residual current circuit breaker quality batch detection system, the zero sequence power supply is used to output zero sequence current according to the control module.

[0020] A circuit breaker batch detection device using the detection system comprises a processor, a constant current source, and a plurality of detection devices.

[0021] The detection device comprises a driving power supply, a switch detection device, and a detection site; the detection site has a phase sequence input connector, a phase sequence output connector, a zero sequence input connector, a zero sequence output connector, and a communication connector, and is used to mount a to-be-detected circuit breaker; the driving power supply is connected with the phase sequence input connector, the switch detection device is connected with the phase sequence output connector, and the processor is connected with the communication connector; a plurality of detection sites are connected in series through the zero sequence input connector and the zero sequence output connector and then connected to an output end of the constant current source;

[0022] The driving power supply, the switch detection device, and the constant current source are connected with the processor, respectively.

[0023] Preferably, the circuit breaker batch detection equipment, the to-be-detected circuit breaker is installed in the detection position, and each connector in the detection position is respectively connected with a corresponding circuit breaker to realize:

[0024] The driving instruction is sent to the plurality of to-be-detected circuit breakers, and whether the circuit breaker is qualified is determined by detecting the opening and closing states of each circuit breaker.

[0025] Preferably, the circuit breaker batch detection equipment, the constant current source simulates to generate a zero sequence current and is input into the to-be-detected circuit breaker in series, to realize:

[0026] The residual current input into the plurality of to-be-detected circuit breakers is controlled, and whether the circuit breaker is qualified is determined by detecting the opening and closing states of each to-be-detected circuit breaker.

[0027] Preferably, the circuit breaker batch detection equipment, the series connection mode between the detection positions is a dynamic series connection, and the specific series connection number is determined according to the number of to-be-detected circuit breakers.

[0028] A circuit breaker detection method of the detection system comprises the steps of:

[0029] The driving instruction is sent to the plurality of circuit breakers, and whether the circuit breaker is qualified is determined by detecting the opening and closing states of each circuit breaker.

[0030] The residual current signal input into the plurality of circuit breakers is controlled, and whether the circuit breaker is qualified is determined by comparing the residual current measurement data of each circuit breaker with the actual residual current value generated by the zero sequence power supply.

[0031] The residual current signal input into the plurality of circuit breakers is controlled, and whether the circuit breaker is qualified is determined by detecting the protection action execution of each circuit breaker in the case that the residual current protection function of the circuit breaker is turned on.

[0032] Compared with the prior art, the batch detection system, equipment and method for residual current circuit breaker quality provided by the application have the following beneficial effects:

[0033] 1) The batch detection system provided by the application can realize the simultaneous detection of a plurality of circuit breakers without increasing the zero sequence power supply, improve the detection efficiency, and be convenient and fast.

[0034] 2) The batch detection equipment provided by the application has low manufacturing cost and can realize the simultaneous detection of a plurality of circuit breakers, reduce the production cycle, and improve the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a structural block diagram of the batch detection system provided by the application;

[0036] Figure 2is a structural block diagram of the batch detection equipment provided by the present application;

[0037] Figure 3 is a flow chart of the batch detection method provided by the present application. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and effect of the present application more clear and explicit, the present application is further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0039] Example 1

[0040] Please refer to Figure 1 and Figure 3 The present application provides a residual current circuit breaker quality batch detection system, which comprises a control module 1, a zero sequence power supply 2 and a plurality of detection modules 3; the phase sequence power supply is preferably an isolation power supply.

[0041] Each of the detection modules 3 comprises a phase sequence power supply 31 and a switch state detection unit 32; the phase sequence power supply 31 is connected to the three-phase incoming line end of the circuit breaker, and the switch state detection unit 32 is connected to the three-phase outgoing line end of the circuit breaker; preferably, the switch state detection unit 32 determines the opening and closing state of the circuit breaker by determining whether the phase sequence outgoing line end of the circuit breaker is live.

[0042] A plurality of circuit breakers to be detected are connected in series through respective zero sequence lines and connected to the output end of the zero sequence power supply 2; at this time, a plurality of the circuit breakers are connected in series through the zero sequence lines, and during normal detection, the zero sequence currents received by the plurality of circuit breakers are the same.

[0043] The control module 1 is connected to the circuit breaker, the phase sequence power supply 31, the switch state detection unit 32 and the zero sequence power supply 2, respectively. The phase sequence power supply 31 is driven by the control module 1 to provide a power supply to the circuit breaker for simulating the power distribution working environment of a normal circuit breaker, and simultaneously communicates with the circuit breaker to remotely control the circuit breaker and receive the operation information of the circuit breaker (including opening and closing log information, etc.); the switch state detection unit 32 is used to detect whether there is a voltage signal at the three-phase outgoing line end of the circuit breaker and send the determination result to the control module 1; specifically, the switch state detection unit 32 is connected to the phase line outgoing line end of the circuit breaker, and the determination result needs to include the voltage signal determination of each phase line outgoing line end; the zero sequence power supply 2 is used to simulate the zero sequence current state of a normal power distribution line according to the control module 1 and can output different state zero sequence currents, such as a fault state zero sequence current and a normal state zero sequence current.

[0044] As a preferred solution, in the embodiment, the control module 1 is in communication connection with the circuit breaker, so as to realize:

[0045] sending driving instructions to the plurality of circuit breakers, collecting the operating states of the respective circuit breakers;

[0046] acquiring the opening and closing states of the circuit breakers, and determining whether the circuit breakers are qualified in cooperation with the operating states.

[0047] As a preferred solution, in the embodiment, the zero sequence power supply 2 generates an analog residual current signal, which is input into the plurality of circuit breakers in series, so as to realize:

[0048] controlling the residual current signals input into the plurality of circuit breakers, and determining the operating states of the circuit breakers according to the residual current values flowing therethrough; the operating states at least include opening and closing information and residual current information;

[0049] acquiring the operating states of the respective circuit breakers by the switch state detection unit 32, and determining whether the circuit breakers are qualified.

[0050] Specifically, the working principle of the circuit breaker quality batch detection system is as follows:

[0051] connecting the plurality of circuit breakers according to the above system mode;

[0052] remote opening and closing function detection: a1, the control module 1 drives the phase sequence power supply 31 to provide power for the circuit breaker in a normal working power environment; a2, the control module 1 sends opening and closing information to the circuit breaker (the opening information can be all phase line contacts of the circuit breaker, or part of them, depending on whether the circuit breaker has the corresponding function), and receives the determination result of the switch state detection unit 32 at the same time; a3, determining whether the remote control function of the circuit breaker is normal.

[0053] circuit breaker residual current protection fault function detection: the control module 1 drives the phase sequence power supply 31 to provide power and the zero sequence power supply 2 to simulate the residual current of the distribution line; b2, the control module 1 sends instructions to the circuit breaker to read the current fault information of the circuit breaker; b3, the control module 1 receives the determination result of the switch state detection unit 32, and determines whether the fault detection function of the circuit breaker is normal.

[0054] circuit breaker residual current measurement function monitoring: c1, the control module 1 drives the phase sequence power supply 31 to provide power and the zero sequence power supply 2 to simulate the residual current of the distribution line; c2, the control module 1 sends instructions to the circuit breaker to read the residual current measurement information of the current circuit breaker; c3, the control module 1 determines whether the residual current measurement function of the circuit breaker is normal by comparing the analog residual current value generated in the zero line power supply with the residual current measurement value read by the circuit breaker.

[0055] Of course, it should be noted that the method of determining whether it is normal use, the present application is not limited, using existing decision-making method can.

[0056] As a preferred embodiment, in the embodiment, the phase sequence power supply 31 outputs the external power supply, simulating the normal power distribution working environment of the circuit breaker.

[0057] As a preferred embodiment, in the embodiment, the phase sequence power supply 31 is connected with the zero sequence power supply 2. The cooperation between the phase sequence power supply 31 and the zero sequence power supply 2 can be better realized.

[0058] Correspondingly, please refer to Figure 3 The application also provides a circuit breaker detection method of the detection system, comprising the steps of:

[0059] Sending a driving instruction to the plurality of circuit breakers, determining whether the circuit breaker is qualified by detecting the opening and closing state of each circuit breaker;

[0060] Controlling the residual current signal input to the plurality of circuit breakers, comparing the residual current measurement data of each circuit breaker with the actual residual current value generated by the zero sequence power supply 2, and determining whether the circuit breaker is qualified;

[0061] Controlling the residual current signal input to the plurality of circuit breakers, and in the case that the residual current protection function of the circuit breaker is turned on, determining whether the circuit breaker is qualified by detecting the protection action execution of each circuit breaker, i.e. the process of changing from the closing state to the opening state.

[0062] Embodiment 2

[0063] Please refer to Figure 2 and Figure 3 The application also provides a circuit breaker batch detection device using the detection system, comprising a processor 4, a constant current source 5 and a plurality of detection devices 6.

[0064] The detection device 6 comprises a driving power supply 61, a switch detection device 62 and a detection site 63; the detection site 63 has a phase sequence input connector, a phase sequence output connector, a zero sequence input connector, a zero sequence output connector and a communication connector, and is used to install the circuit breaker to be detected; the driving power supply 61 is connected with the phase sequence input connector, the switch detection device 62 is connected with the phase sequence output connector, and the processor 4 is connected with the communication connector; a plurality of detection sites 63 are connected in series through the zero sequence input connector and the zero sequence output connector, and are connected with the output end of the constant current source 5.

[0065] The driving power supply 61, the switch detection device 62 and the constant current source 5 are connected with the processor 4 respectively.

[0066] Specifically, the processor 4 and the control module 1 in embodiment 1, the constant current source 5 and the zero sequence power supply 2, the driving power supply 61 and the phase sequence power supply 31, the switch detection device 62 and the switch state detection unit 32 are connected in the same way, function and execution mode, which will not be repeated here. The detection site 63 is used to install the circuit breaker to be detected. It should be noted that the detection site 63 can be a separate device, or a detection position provided on the detection equipment provided by the application. The simplest detection site 63 is the collection of all function connectors, which is convenient to connect with the circuit breaker, and the wiring required for detection in the detection equipment is connected to the corresponding connector. When detection is needed, the connection end of the circuit breaker is connected to the corresponding connector of the detection site 63.

[0067] Specifically, before starting detection, a plurality of circuit breakers to be detected are installed on the detection site 63 of the detection equipment according to the above requirements. The processor 4 controls the driving power supply 61 to provide power supply for the circuit breaker, and at the same time drives the constant current source 5 to generate an analog residual current signal. The information of the switch detection device 62 is used to identify the opening and closing state of the circuit breaker, and at the same time the circuit breaker is communicated to collect the tripping information of the circuit breaker. Batch production detection is realized at the same time.

[0068] Specifically, in the field implementation, the driving power supply 61 is an isolation power supply connected to the phase voltage input end of the circuit breaker. The switch detection device 62 is connected to the phase voltage output end of the circuit breaker, and the constant current source 5 is connected to the zero sequence current input and output end of the circuit breaker in turn. The processor 4 is connected with the circuit breaker through the communication line to realize data communication.

[0069] The A, B and C phases (phase voltage lines) of the measured circuit breaker are independent, and the N pole (zero sequence current line) is connected in series in turn, that is, the output end of the first circuit breaker is connected to the input end of the second circuit breaker. The output 1 end of the constant current source 5 is connected to the N pole input end of the first circuit breaker, and after passing through the series circuit breaker, the N pole output end of the n circuit breaker is connected to the output 2 end of the constant current source 5.

[0070] After the batch of circuit breakers to be detected are placed in the detection equipment, all the circuit breakers are placed in the closing state. The processor 4 controls the driving power supply 61 to power on, so that the measured circuit breaker starts to work normally. At the same time, the opening and closing state of the current measured circuit breaker is judged by querying the switch detection device 62. The running state of the circuit breaker is confirmed by communicating with the measured circuit breaker through the communication line.

[0071] After the control module 1 confirms that all the circuit breakers are working normally, the constant current source 5 starts to output analog zero sequence current to simulate residual current for testing.

[0072] When the measured circuit breaker detects that the current is greater than the preset residual current protection action threshold, the tripping action is performed, at which time the A, B, C phase contacts are changed from closed to open. Therefore, the corresponding switch detection device 62 detects that the switch is tripped. After the processor 4 receives the displacement signal of the switch detection device 62, the current constant current source 5 output current value is recorded, and the corresponding circuit breaker performing the protection action is read through communication, and it is confirmed whether the residual current protection action event occurs. By comparing the data, it is finally confirmed whether the residual current protection function of the circuit breaker is normal.

[0073] Generally, the measured circuit breaker is a 3P+N (A, B, C, N mode) structure, wherein the A, B, C phases have breaking function, and the N pole is straight through. Therefore, when the circuit breaker is tripped, the A, B, C phase poles can be changed from the closed state to the open state, and the N pole is still in the straight through state.

[0074] The current output of the constant current source 5 is connected in turn from the N pole of the measured circuit breaker. Since the N pole is a straight through structure, even if one of the measured circuit breakers triggers the protection action to trip during batch detection, the cross current source current output will not be affected and can still normally output the simulated leakage current, which will not affect the residual current detection of other circuit breakers.

[0075] As a preferred solution, in the embodiment, the circuit breakers to be detected are installed in the detection position 63, and each connector in the detection position 63 is respectively connected to the corresponding circuit breaker, so as to achieve:

[0076] The driving instructions are sent to a plurality of circuit breakers to be detected, and the breaking and closing states of each circuit breaker are detected to determine whether the circuit breaker is qualified.

[0077] As a preferred solution, in the embodiment, the constant current source 5 simulates the generation of zero sequence current and inputs into the series connected circuit breakers to be detected, so as to achieve:

[0078] The residual current input into a plurality of circuit breakers to be detected is controlled, and the breaking and closing states of each circuit breaker to be detected are detected to determine whether the circuit breaker is qualified.

[0079] As a preferred solution, in the embodiment, the series connection mode between the detection positions 63 is a dynamic series connection, and the specific series connection number is determined by the number of circuit breakers to be detected. The dynamic series connection means that the number of detection positions 63 can be adjusted according to the number of circuit breakers to be detected during actual use, and the adjustment method is common sense in the art.

[0080] It can be understood that those skilled in the art can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present application, and all these changes or replacements shall belong to the protection scope of the claims attached to the present application.

Claims

1. A residual current circuit breaker mass batch detection system, characterized by, The control module, the zero sequence power supply and a plurality of detection modules are included. Each detection module includes a phase sequence power supply and a switch state detection unit; the phase sequence power supply is connected with three-phase incoming line terminals of the circuit breaker, and the switch state detection unit is connected with three-phase outgoing line terminals of the circuit breaker; the phase sequence power supply is driven by the control module to provide a power supply for the circuit breaker, so as to simulate a normal power distribution working environment of the circuit breaker; the phase sequence power supply simultaneously communicates with the circuit breaker to remotely control the circuit breaker and receive operation information of the circuit breaker; the switch state detection unit is used to detect whether there is a voltage signal at the three-phase outgoing line terminals of the circuit breaker, and sends a determination result to the control module; the determination result includes voltage signal determination of each phase line outgoing terminal; A plurality of circuit breakers to be detected are connected with an output terminal of the zero sequence power supply through respective zero sequence lines in series; The control module is connected with the circuit breaker, the phase sequence power supply, the switch state detection unit and the zero sequence power supply; the control module is in communication connection with the circuit breaker; the zero sequence power supply generates a simulation residual current signal and inputs the signal into the plurality of circuit breakers in series; The control module drives the phase sequence power supply to provide a power supply for the circuit breaker according to a normal working power environment; the control module sends opening and closing information of the circuit breaker to the control module; the opening and closing information includes opening and closing information of all phase line contacts or part of phase line contacts of the circuit breaker; meanwhile, the control module receives a first determination result of the switch state detection unit; the first determination result includes a determination of whether a remote control function of the circuit breaker is normal; The control module drives the phase sequence power supply to provide a power supply and the zero sequence power supply to simulate a residual current of a power distribution line; the control module sends an instruction to the circuit breaker to read current fault information of the circuit breaker; the control module receives a second determination result of the switch state detection unit; the second determination result includes a determination of whether a fault detection function of the circuit breaker is normal; The control module drives the phase sequence power supply to provide a power supply and the zero sequence power supply to simulate a residual current of a power distribution line; the control module sends an instruction to the circuit breaker to read residual current measurement information of the circuit breaker; the control module compares a simulation residual current value generated by the zero sequence power supply with a residual current measurement value read by the circuit breaker to determine whether a residual current measurement function of the circuit breaker is normal.

2. The residual current circuit breaker mass quantity detection system according to claim 1, characterized in that, The phase sequence power supply outputs commercial power to simulate a normal power distribution working environment of the circuit breaker.

3. The current breaker quality lot detection system of claim 1, wherein, The zero sequence power supply is used to output a zero sequence current according to the control module.

4. A circuit breaker mass inspection apparatus using the inspection system according to any one of claims 1 to 3, characterized by The processor, a constant current source and a plurality of detection devices are included. The detection device includes a driving power supply, a switch detection device and a detection site; the detection site has a phase sequence incoming terminal, a phase sequence outgoing terminal, a zero sequence incoming terminal, a zero sequence outgoing terminal and a communication terminal, and is used to install a circuit breaker to be detected; the driving power supply is connected with the phase sequence incoming terminal, the switch detection device is connected with the phase sequence outgoing terminal, and the processor is connected with the communication terminal; a plurality of detection sites are connected with an output terminal of the constant current source in series through the zero sequence incoming terminal and the zero sequence outgoing terminal. The driving power supply, the switch detection device and the constant current source are connected with the processor respectively.

5. The circuit breaker bulk detection apparatus according to claim 4, wherein The circuit breaker to be detected is arranged in the detection position, and each connector in the detection position is respectively connected with a corresponding connector of the circuit breaker, so as to realize: The driving instruction is sent to the plurality of circuit breakers to be detected, and whether the circuit breaker is qualified is determined by detecting the opening and closing states of each circuit breaker.

6. The circuit breaker bulk testing apparatus of claim 5, wherein, The constant current source simulates to generate zero sequence current and input into the series-connected circuit breaker to be detected, so as to realize: The residual current input into the plurality of circuit breakers to be detected is controlled, and whether the circuit breaker is qualified is determined by detecting the opening and closing states of each circuit breaker to be detected.

7. The circuit breaker bulk testing apparatus of claim 5, wherein, The series connection mode between the detection positions is dynamic series connection, and the specific series connection number is determined by the number of circuit breakers to be detected.

8. A circuit breaker detection method based on the detection system according to any one of claims 1 to 3, characterized in that, The remote opening and closing function detection step, the circuit breaker residual current protection fault function detection step and the circuit breaker residual current measurement function monitoring step are included. The remote opening and closing function detection step includes: a1, the control module drives the phase sequence power supply to provide power supply for the circuit breaker according to the normal working power environment; a2, the control module sends the opening and closing information of the circuit breaker to the circuit breaker, the opening and closing information includes the opening and closing information of all phase line contacts or part of phase line contacts of the circuit breaker, and the determination result of the switch state detection unit is received; a3, whether the remote control function of the circuit breaker is normal is determined according to the determination result; The circuit breaker residual current protection fault function detection step includes: b1, the control module drives the phase sequence power supply to provide power supply and the zero sequence power supply to simulate the residual current of the power distribution line; b2, the control module sends the instruction to the circuit breaker to read the current fault information of the circuit breaker; b3, the control module receives the determination result of the switch state detection unit to determine whether the fault detection function of the circuit breaker is normal; The circuit breaker residual current measurement function monitoring step includes: c1, the control module drives the phase sequence power supply to provide power supply and the zero sequence power supply to simulate the residual current of the power distribution line; c2, the control module sends the instruction to the circuit breaker to read the residual current measurement information of the current circuit breaker; c3, the control module determines whether the residual current measurement function of the circuit breaker is normal by comparing the simulated residual current value in the zero sequence power supply and the residual current measurement value read by the circuit breaker.

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