Circuit breaker intelligent comprehensive detector and detection method

Abstract

The invention discloses a circuit breaker intelligent comprehensive detector and a detection method in the technical field of circuit breaker intelligent comprehensive detectors. The circuit breaker intelligent comprehensive detector comprises a central unit control / acquisition module, an AC voltage / current output module, an excitation signal module, a contact signal module, an insulation test module and a circuit breaker test module. The central unit control / acquisition module is respectively connected with other modules and is used for distributing instructions to each module, acquiring and conditioning test data signals and evaluating the comprehensive state of the circuit breaker; the alternating voltage / current output module is used for applying excitation to a coil of the voltage comparison relay or the current comparison relay; the excitation signal module is used for applying excitation to the relay coil and the circuit breaker coil; the contact signal module is used for testing the performance of a relay contact; the insulation test module is used for carrying out an insulation test on a secondary circuit of the circuit breaker; the circuit breaker test module is used for testing mechanical characteristics of the circuit breaker.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent integrated detectors for circuit breakers, and specifically to an intelligent integrated detector for circuit breakers and a detection method thereof. Background Art

[0002] For the detection work of relays, in the past, non-specialized instruments such as "relay protection calibrators" and "mechanical characteristic detectors" were often used at the work site to test relays. Only a small number of parameters such as operating time and operating voltage could be measured. Moreover, the existing operating time and operating voltage measurement devices are limited in the types of relays they target. When measuring the operating characteristics, the on-off state of the relay contacts is judged in a digital quantity mode or a fixed potential mode, which does not fully reflect the opening and closing process of the contacts, and the coil characteristics and contact performance of the relay cannot be tested. There are also no scientific state evaluation parameters and evaluation methods to determine whether the relay operates reliably. The "Intelligent Detection Device for the Operating Characteristics of Secondary Circuit Relays of Switching Equipment" developed in 2021 is specially optimized for the operating characteristics and detection features of relays, and can measure parameters such as the operating time, waveform, bounce, coil performance, and contact performance of relays, and give data analysis conclusions. After being used on site, it has received favorable comments from users; however, this device only simply compares the test data with the standard, does not conduct a state evaluation on the measured relay, and cannot simply judge the performance of the relay, and further in-depth research is required. The mechanical characteristic testing technology of foreign high-voltage switchgear is becoming increasingly mature. The mechanical characteristic detectors developed by companies such as Wuhan Dayang Yitian, Shijiazhuang Handi, and German ABB have been on the market for many years, and the related functions of mechanical characteristic testing have approached perfection. Users feedback that their products have good anti-interference capabilities and can make relatively accurate measurements of the mechanical characteristic parameters of high-voltage switches. However, the work such as the issuance of PMS3.0 tasks and data upload has not been digitally integrated and still needs to be completed manually, which is time-consuming and laborious, with low data utilization rate and high time cost.

[0003] Regarding the research on the current waveforms of the closing and opening coils of switching equipment, the State Grid Corporation has formed a complete enterprise standard, and domestic manufacturers have also developed mature products. However, due to reasons such as a large number of instruments, complex wiring, and low detection priority during on-site maintenance, the on-site application rate is not high. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide an intelligent integrated detector for circuit breakers and a detection method thereof. By analyzing the test data of circuit breakers and relays, the comprehensive state of the circuit breaker is evaluated, which is more accurate and comprehensive than the prior art detection.

[0005] To solve the above technical problems, the present invention is implemented by adopting the following technical solutions:

[0006] In a first aspect, the present invention provides an intelligent integrated detector for a circuit breaker, comprising a central unit control / acquisition module, an AC voltage / current output module, an excitation signal module, a contact signal module, an insulation test module, and a circuit breaker test module;

[0007] The central unit control / acquisition module is respectively connected to the AC voltage / current output module, the excitation signal module, the contact signal module, the insulation test module, and the circuit breaker test module, and is used for distributing instructions to each module, collecting and conditioning test data signals, and evaluating the comprehensive state of the circuit breaker;

[0008] The AC voltage / current output module is used for applying excitation to the coil of a voltage comparison relay or a current comparison relay;

[0009] The excitation signal module is used for applying excitation to the relay coil and the circuit breaker coil;

[0010] The contact signal module is used for testing the contact performance of the relay;

[0011] The insulation test module is used for performing an insulation test on the secondary circuit of the circuit breaker;

[0012] The circuit breaker test module is used for testing the mechanical characteristics of the circuit breaker.

[0013] Optionally, it further includes an upper computer analysis and display module; the upper computer analysis and display module includes an external tablet computer, which is used for human-machine interaction interface display, data display, and evaluation report output.

[0014] Optionally, the central unit control / acquisition module includes a main board, a high-speed acquisition board, and a core board; the main board is responsible for the external data communication of the whole machine; the high-speed acquisition board is responsible for the signal acquisition and conditioning of the whole machine; the core board is responsible for the instruction distribution control of the whole machine; the central unit control / acquisition module is internally provided with a PMS communication module for uploading data to the PMS system.

[0015] Optionally, the AC voltage / current output module includes an adjustable AC voltage excitation source for a voltage comparison relay and an adjustable AC current excitation source for a current comparison relay; the adjustable AC voltage excitation source includes 1 single-phase AC voltage output channel, with adjustable voltage from 5 to 500V and a voltage output capacity of 25VA; the adjustable AC current excitation source includes 1 single-phase AC current output channel, with adjustable current from 0 to 1A and an open-circuit voltage of 5V; the AC voltage / current output module drives the circuit or component to work by applying voltage / current signals to the device under test to obtain device drive signal data.

[0016] Optionally, the excitation signal module includes an adjustable DC voltage excitation source and an adjustable DC current excitation source; the adjustable DC voltage excitation source includes one path of DC 5 - 270V 500W, and the adjustable DC current excitation source includes one path of DC 0 - 6A with an open-circuit voltage of 10V.

[0017] Optionally, the contact signal module includes a contact power supply board, 4 normally open contacts and 4 normally closed contacts; the output mode of the contact signal module can be switched according to the test items, and the signal output control is completed by the central unit control / acquisition module. The voltage between contacts and the current flowing through the contacts are both transformed, conditioned and acquired.

[0018] Optionally, the insulation test module includes a voltage source with a DC 500V output, which is used to provide a stable voltage output for the insulation test of the secondary circuit; the acquisition circuit of the insulation test module is used to acquire the voltage and current signals used in the device test and calculate the insulation impedance value.

[0019] Optionally, the circuit breaker test module includes 6 wired test channels for metal contacts, 3 wireless test channels for double-ended grounded break ports and 3 wireless test channels for travel.

[0020] Optionally, the intelligent integrated circuit breaker detector adopts a wireless measurement and control mode, which is used for wireless measurement and control of the break port measurement unit in the circuit breaker test module, the speed and travel test unit in the AC voltage / current output module, and the loop resistance test unit in the insulation test module.

[0021] In a second aspect, the present invention also provides a method for detecting an intelligent integrated circuit breaker detector, which is applied to the intelligent integrated circuit breaker detector according to any one of the first aspects, and includes the following steps:

[0022] Use the central unit control / acquisition module to allocate instructions to the AC voltage / current output module, the excitation signal module, the contact signal module, the insulation test module and the circuit breaker test module;

[0023] According to the instructions allocated by the central unit control / acquisition module, apply excitation to the coil of the voltage comparison relay or current comparison relay through the AC voltage / current output module, and apply excitation to the relay coil and the circuit breaker coil through the excitation signal module; test the contact performance of the relay through the contact signal module; test the insulation performance of the secondary circuit of the circuit breaker through the insulation test module, and test the mechanical characteristics of the circuit breaker through the circuit breaker test module;

[0024] Use the central unit control / acquisition module to collect and condition the test data of the contact signal module, the insulation test module and the circuit breaker test module, and evaluate the comprehensive state of the circuit breaker.

[0025] Compared with the prior art, the present invention provides an intelligent comprehensive detector for circuit breakers and a detection method, having the following beneficial effects:

[0026] 1. The present invention integrates two devices for relay contactor detection and mechanical characteristic detection of circuit breakers; the device has both relay contactor detection and circuit breaker test functions, and evaluates the comprehensive state of the circuit breaker by analyzing the data of circuit breaker tests and relay tests; by analyzing the contact resistance of the relay circuit and the contact resistance of the secondary main circuit, the conduction of the secondary circuit can be evaluated; by analyzing the current waveform curves of the closing and opening coils, the working state of the closing and opening coils can be evaluated; at the same time, the development of the insulation performance test function of the secondary circuit is carried out.

[0027] 2. For the mechanical characteristic test module of the present invention, an innovative wireless transmission method is adopted between the device signal sampling end and the device host to achieve wireless measurement of the fracture travel, speed, and double-end grounded metal fracture time parameters, reducing the workload of test wiring and improving the test safety performance. At the same time, the wireless transmission module and the instrument body have sufficient anti-interference and anti-inductive electricity capabilities to ensure the accuracy of test results when some equipment in the substation is powered off; one machine with multiple functions can dynamically evaluate the relays and coils in the circuit at the same time, ensuring the accuracy of the test report and the security of information transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is the structure diagram of the comprehensive detector for circuit breakers provided according to the embodiment of the present invention;

[0029] Figure 2 It is the schematic diagram of the comprehensive detector for circuit breakers provided according to the embodiment of the present invention;

[0030] In the figure: 1 - detector, 2 - detector host panel, 3 - machine cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The technical solution of the present invention will be described in detail below with reference to the drawings and specific embodiments. It should be understood that the specific features in the embodiments of the present patent are detailed descriptions of the technical solution of the present patent, rather than limitations on the technical solution of the present patent. Without conflict, the technical features in the embodiments of the present patent and the embodiments can be combined with each other.

[0032] It should be noted that the term "and / or" in this article is only a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0033] Embodiment 1:

[0034] An embodiment of the present invention discloses a circuit breaker comprehensive detector, referring to Figure 1 as shown, which includes a central unit control / acquisition module, an AC voltage / current output module, an excitation signal module, a contact signal module, an insulation test module, and a circuit breaker test module.

[0035] The central unit control / acquisition module is respectively connected to the AC voltage / current output module, the excitation signal module, the contact signal module, the insulation test module, and the circuit breaker test module, and is used for distributing instructions to each module, collecting test data signals, signal conditioning, and external communication; the central unit control / acquisition module includes a main board, a high-speed acquisition board, and a core board; the main board is responsible for the external data communication of the whole machine; the high-speed acquisition board is responsible for the signal acquisition and conditioning of the whole machine; the core board is responsible for the instruction distribution control of the whole machine; the central unit control / acquisition module is built-in with a PMS communication module for uploading the test result data to the PMS system.

[0036] The AC voltage / current output module is used for the coil excitation of the voltage comparison relay and the current comparison relay; the AC voltage / current output module includes an adjustable AC voltage excitation source for the voltage comparison relay and an adjustable AC current excitation source for the current comparison relay; the adjustable AC voltage excitation source includes 1 single-phase AC voltage output channel with adjustable voltage from 5V to 500V and a voltage output capacity of 25VA; the adjustable AC current excitation source includes 1 single-phase AC current output channel with adjustable current from 0A to 1A and an open-circuit voltage of 5V; the AC voltage / current output module drives the circuit or component to work by applying voltage / current signals to the device under test to obtain the device drive signal data; according to the test requirements of the voltage / current comparison relay, start the adjustable AC voltage (5 - 500V / 25VA) or current (real-time collect the voltage and current values of the output loop, verify the relay action threshold, 0 - 1A / 5V) output.

[0037] The excitation signal module is used for the excitation of the relay coil and the circuit breaker coil; the excitation signal module includes an adjustable DC voltage excitation source and an adjustable DC current excitation source, the adjustable DC voltage excitation source includes 1 path of DC5 - 270V 500W, the adjustable DC current excitation source includes 1 path of DCO - 6A with an open-circuit voltage of 10V; start the adjustable DC voltage or current excitation source, output a dynamic excitation signal to the relay coil / circuit breaker closing and opening coil, and collect the coil current waveform (such as the closing and opening coil current rise time, peak value, holding current).

[0038] The contact signal module is used for the performance test of relay contacts; the contact signal module includes a contact power supply board, 4 normally open contacts and 4 normally closed contacts; the output mode of the contact signal module can be switched according to the test items, and the signal output control is completed by the central unit control module. The voltage between contacts and the current flowing through the contacts need to be transformed, conditioned and collected; the power output regulation and output on / off control are completed by the central unit control module, and all power output voltages and loop currents need to be transformed / conditioned and collected; when working, switch the output mode of the constant voltage source (4 channels of 6V) or the constant current source (4 channels of 1A), test the contact resistance, bounce time, action response speed of the relay contacts, the voltage drop, current transient waveform, and contact calculation insulation impedance (R = V / I) when the contacts are closed / open, and judge the resistance value of the loop insulation performance.

[0039] The insulation test module is used for the insulation test of the secondary circuit of the circuit breaker; the insulation test module includes a voltage source with a DC500V output, and the voltage source is a circuit element for providing a stable voltage output for the insulation test of the secondary circuit; the acquisition loop of the insulation test module can acquire the voltage and current signals used in the device test and calculate the insulation impedance value; when working, start the DC 500V insulation test voltage output, apply the test voltage to the secondary circuit, and measure the leakage current.

[0040] The circuit breaker test module is used for the test of the mechanical characteristics of the circuit breaker. The circuit breaker test module includes 6 wired test channels for metal contacts, 3 wireless test channels for double-ended grounded disconnectors, and 3 wireless test channels for travel, and can realize the mechanical characteristic tests of vacuum circuit breakers, SF6 circuit breakers and GIS double-ended grounded circuit breakers; when working, trigger the opening and closing time, speed, and stroke synchronization of the mechanical characteristic test, wirelessly collect the data of 6 metal contacts, 3 double-ended grounded disconnectors, and 3 travel sensors, and measure the three-phase opening and closing time difference, opening and closing time (ms), stroke-speed curve, and disconnector action synchronization data through GPS clock synchronization.

[0041] The circuit breaker comprehensive detector also includes a host computer analysis and display module; the host computer analysis and display module includes an external Android tablet computer, which is used for human-computer interaction interface display, data display and evaluation report output.

[0042] Reference Figure 2 The figure shows the schematic diagram of the circuit breaker comprehensive detector proposed in this embodiment; the detector 1 uses a wireless measurement and control mode to perform wireless measurement and control on the disconnector measurement unit, speed and stroke test unit, and loop resistance test unit of the device under test; when testing the wireless measurement and control function, the data test and classification are realized on the tablet human-computer interaction interface; when testing the insulation resistance and loop resistance, manual wire connection is required. For the convenience of on-site wiring, the coil current test unit and the coil DC resistance test unit are built into the measurement and control host.

[0043] The circuit breaker intelligent comprehensive detector includes a Windows tablet computer, a measurement and control host and various acquisition units; the tablet computer and the measurement and control host use Bluetooth communication and have multiple functions, including human-computer interaction function, test data management and secondary development of PMS3.0; the measurement and control host communicates with the acquisition unit through LORA, and its main functions include various parameter tests of secondary relays, control voltage measurement and control of mechanical characteristics test of circuit breakers, low-break and low-close test of circuit breakers, test voltage measurement and control during direct resistance test of circuit breaker closing and opening coils, wireless measurement and control of each phase break, wireless measurement and control of each phase travel data, measurement of three-phase closing and opening coil current, and coil DC resistance measurement, wireless measurement and control of insulation resistance test, and wireless measurement and control of loop resistance test. All of them have microprocessors, GPS synchronous clocks, wireless LORA transmission modules, and support 2 ordinary metal breaks and 2 double-end grounded breaks for each phase. Each phase reserves 2 closing resistors and 2 graphite contact hardware circuits; after receiving the test information of the measurement and control host, the break measurement data is wirelessly transmitted to the measurement and control host For example, when performing a double-terminal grounding break test, a double-terminal grounding signal excitation source unit is set for each phase. The unit has a built-in LORA module and a microprocessor, which can communicate wirelessly with the main control microprocessor in real time and decide whether to start the excitation power signal output; the three-phase speed travel acquisition unit is completely equivalent, both have a microprocessor, a GPS synchronous clock, and a wireless LORA transmission module. Each phase supports 1 analog travel sensor and 1 digital travel sensor; after receiving the test information of the measurement and control host, the travel measurement data is wirelessly transmitted to the measurement and control host; for insulation resistance testing, only one test device is used, and the three-phase test is carried out by artificial reversing the line. It has a wireless LORA transmission module, and the test unit has a built-in microprocessor. After receiving the test information of the measurement and control host, the insulation resistance data is wirelessly transmitted to the measurement and control host. For loop resistance testing, only one test device is used, and the three-phase test is carried out by artificial reversing the line. It has a wireless LORA transmission module, and the test unit has a built-in microprocessor. After receiving the test information of the measurement and control host, the loop resistance data is wirelessly transmitted to the measurement and control host.

[0044] The circuit breaker comprehensive detector of this embodiment integrates relay (contactor) detection and circuit breaker mechanical characteristic detection, and has relay (contactor) detection and circuit breaker test functions; by analyzing the data of circuit breaker test and relay test data, the comprehensive state of the circuit breaker is evaluated; by analyzing the contact resistance of the relay circuit and the contact resistance of the secondary total circuit, the conduction condition of the secondary circuit can be evaluated; by analyzing the current waveform curve of the opening and closing coil, the working state of the opening and closing coil can be evaluated.

[0045] In this embodiment, the development of the insulation performance test function for the secondary circuit is also carried out. The main unit of the circuit breaker intelligent comprehensive detector: the opening and closing control of the circuit breaker and the verification of the secondary circuit relay. The mechanical characteristic and loop resistance measurement module: the measurement functions of the conventional contact, double-end grounding, opening and closing stroke (speed), and primary circuit resistance are realized by a distributed measurement method, and the measurement modules such as closing resistance and graphite contact can be expanded in the later stage.

[0046] The data is wirelessly transmitted to the detection main unit. Satellite signal synchronous measurement is adopted among all modules. There is a detector main unit panel 2 inside the detector 1. The upper surface of the detector 1 is movably connected with a machine cover 3 through a hinge. The upper computer analysis and display module includes an external Android tablet computer. The central unit control / collection module includes a main board, a high-speed collection board, and a core board. The AC voltage / current output module includes the coil excitation for the voltage or current comparison relay. The excitation signal module includes an adjustable DC voltage excitation source and a DC current excitation source. The contact signal module includes an isolated 4-way 6V constant voltage source and 4-way 1A constant current source. The insulation test module consists of a voltage source with a 1-way DC500V output. The circuit breaker test module is used for the test of the mechanical characteristics of the circuit breaker. For the mechanical characteristic test module, an innovative wireless transmission method is adopted between the device signal sampling end and the device main unit to realize the wireless measurement of the contact stroke, speed test, and the time parameter test of the double-end grounding metal contact, reduce the workload of test wiring, improve the test safety performance. At the same time, the wireless transmission module and the instrument body have sufficient anti-interference and anti-inductive electricity capabilities to ensure the accuracy of the test results when some equipment in the substation is powered off. It has multiple functions in one machine, dynamically evaluates the relays and coils in the circuit at the same time. The device is built with a digital upgrade module for the PMS3.0 power outage test instrument. Tasks are issued by PMS3.0, and the instrument automatically conducts performance evaluation. The test results are automatically generated into reports and uploaded to the PMS terminal to ensure the accuracy of the test reports and the security of information transmission.

[0047] The detection device management software is developed based on the native Android SDK. To allow the application to scale up or down when necessary, improve the robustness of the application, and facilitate the testing of the application, the framework of the detection device management software adopts a layered design. At the same time, a modular design of each function is adopted for the business layer. The detection device management software is divided into three levels during development: the UI interface, the business layer, and data communication. The UI interface development provides an intuitive display interface and a smooth operation experience, aiming at response speed and accurate data display. The business layer, as the core of the detection device management software, is responsible for processing business logic and data, and realizes the interaction between the UI interface layer and the data communication layer by defining business interfaces, ensuring the independence and testability of the business logic. The data communication layer is responsible for data exchange with external devices or systems, ensuring the real-time nature of the data. In terms of the maintenance and upgrade of the detection device management software, the modular design enables the development to quickly locate problems and repair them, and at the same time, new functions can be easily added to adapt to the changing business requirements.

[0048] Embodiment 2:

[0049] Based on the same inventive concept as Embodiment 1, an embodiment of the present invention discloses a comprehensive circuit breaker detection method, which is applied to the comprehensive circuit breaker detector described in any one of Embodiment 1, and includes:

[0050] S1, using the central unit control / acquisition module to allocate instructions to the AC voltage / current output module, the excitation signal module, the contact signal module, the insulation test module, and the circuit breaker test module;

[0051] S2, according to the instructions allocated by the central unit control / acquisition module, applying excitation to the coil of the voltage comparison relay or the current comparison relay through the AC voltage / current output module, applying excitation to the relay coil and the circuit breaker coil through the excitation signal module; testing the contact performance of the relay contacts through the contact signal module; testing the insulation performance of the secondary circuit of the circuit breaker through the insulation test module, and testing the mechanical characteristics of the circuit breaker through the circuit breaker test module;

[0052] S3, using the central unit control / acquisition module to collect and condition the test data of the contact signal module, the insulation test module, and the circuit breaker test module, and evaluating the comprehensive state of the circuit breaker.

[0053] Specifically, in step S2, the 0-6A adjustable DC current source of the excitation signal module provides excitation for the coil test. The high-speed acquisition board realizes μs-level signal acquisition, meeting the precise capture and analysis of the on-off coil current waveform duration of about 20-100 ms. With the multi-channel constant voltage / constant current source design of the contact signal module and the signal acquisition ability of the central unit control / acquisition module, the contact resistance can be accurately measured. The DC500V voltage source of the insulation test module provides a basis for the secondary circuit test. Using wireless measurement and control, the real-time transmission of test data can be ensured through 2.4G / 5G dual-band communication. The time resolution supported by the breaker test channel is ≤0.1 ms, meeting the mechanical characteristic test requirements of the GB / T 3309 standard. The PMS communication module realizes data docking with the power grid management system.

[0054] In summary, the intelligent comprehensive detector and detection method for circuit breakers proposed by the present invention integrate the functions of relay contactor detection and circuit breaker mechanical characteristic detection. By analyzing the data of circuit breaker tests and relay tests, the comprehensive state of the circuit breaker is evaluated, which is more comprehensive compared with the prior art. Relying on the human-computer interaction module of the Android tablet, the data standardization process is completed through the instruction distribution control of the core board. The test results meet the standard requirements such as DL / T 846.3-2017, realizing the full-process digitization from detection to management.

[0055] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0056] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, and the combination of processes and / or blocks in the flowchart and / or block diagram, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for realizing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0057] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce a manufacture including instruction means that implement the functions specified in one or more of the processes and / or blocks Figure 1 one or more of the processes and / or blocks Figure 1 specified in the block or blocks.

[0058] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable apparatus provide steps for implementing the functions specified in one or more of the processes and / or blocks Figure 1 one or more of the processes and / or blocks Figure 1 specified in the block or blocks.

[0059] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the spirit of the present invention and the scope protected by the claims. All of these are within the protection scope of the present invention.

Claims

1. An intelligent integrated detector for a circuit breaker, characterized in that, It includes a central unit control / acquisition module, an AC voltage / current output module, an excitation signal module, a contact signal module, an insulation test module, and a circuit breaker test module; The central unit control / acquisition module is respectively connected to the AC voltage / current output module, the excitation signal module, the contact signal module, the insulation test module, and the circuit breaker test module, and is used to allocate instructions to each module, collect and condition test data signals, and evaluate the comprehensive state of the circuit breaker; The AC voltage / current output module is used to apply excitation to the coil of the voltage comparison relay or the current comparison relay; The excitation signal module is used to apply excitation to the relay coil and the circuit breaker coil; The contact signal module is used to test the contact performance of the relay; The insulation test module is used to conduct the insulation test of the secondary circuit of the circuit breaker; The circuit breaker test module is used to test the mechanical characteristics of the circuit breaker.

2. The intelligent comprehensive detector for a circuit breaker according to claim 1, wherein It further includes an upper computer analysis and display module; the upper computer analysis and display module includes an external tablet computer, which is used for human-computer interaction interface display, data display, and evaluation report output.

3. An intelligent comprehensive detector for a circuit breaker according to claim 1, characterized in that, The central unit control / acquisition module includes a main board, a high-speed acquisition board, and a core board; the main board is responsible for the external data communication of the whole machine; the high-speed acquisition board is responsible for the signal acquisition and conditioning of the whole machine; The core board is responsible for the instruction allocation control of the whole machine; the central unit control / acquisition module is internally provided with a PMS communication module for uploading data to the PMS system.

4. The intelligent comprehensive detector for a circuit breaker according to claim 1, wherein, The AC voltage / current output module includes an adjustable AC voltage excitation source for the voltage comparison relay and an adjustable AC current excitation source for the current comparison relay; the adjustable AC voltage excitation source includes 1 single-phase AC voltage output channel, with adjustable voltage from 5 to 500V and a voltage output capacity of 25VA; the adjustable AC current excitation source includes 1 single-phase AC current output channel, with adjustable current from 0 to 1A and an open-circuit voltage of 5V; the AC voltage / current output module drives the circuit or component to work by applying voltage / current signals to the device under test to obtain device drive signal data.

5. An intelligent comprehensive detector for a circuit breaker according to claim 1, characterized in that, The excitation signal module includes an adjustable DC voltage excitation source and an adjustable DC current excitation source; the adjustable DC voltage excitation source includes 1 channel of DC5 - 270V 500W, and the adjustable DC current excitation source includes 1 channel of DCO - 6A with an open-circuit voltage of 10V.

6. The intelligent integrated detector for a circuit breaker according to claim 1, wherein, The contact signal module includes a contact power supply board, 4 normally open contacts, and 4 normally closed contacts; the output mode of the contact signal module can be switched according to the test item, and the signal output control is completed by the central unit control / acquisition module. The voltage between contacts and the current flowing through the contacts are both transformed, conditioned, and collected.

7. An intelligent integrated detector for a circuit breaker according to claim 1, characterized in that: The insulation test module includes a voltage source with a DC500V output, which is used to provide a stable voltage output for the insulation test of the secondary circuit; the acquisition circuit of the insulation test module is used to collect the voltage and current signals used in the device test and calculate the insulation impedance value.

8. An intelligent comprehensive detector for a circuit breaker according to claim 1, characterized in that, The circuit breaker test module includes 6 wired test channels for metal contacts, 3 wireless test channels for double-ended grounded break ports, and 3 wireless test channels for travel.

9. The intelligent comprehensive detector for a circuit breaker according to claim 1, wherein, The circuit breaker intelligent comprehensive detector adopts a wireless measurement and control mode and is used for wireless measurement and control of the contact measurement unit in the circuit breaker test module, the speed and stroke test unit in the AC voltage / current output module, and the loop resistance test unit in the insulation test module.

10. A detection method for a circuit breaker intelligent comprehensive detector, which is applied to the circuit breaker intelligent comprehensive detector described in any one of claims 1-9, and is characterized in that, It includes the following steps: Using the central unit control / acquisition module to distribute instructions to the AC voltage / current output module, excitation signal module, contact signal module, insulation test module, and circuit breaker test module; According to the instructions distributed by the central unit control / acquisition module, applying excitation to the coil of the voltage comparison relay or current comparison relay through the AC voltage / current output module, applying excitation to the relay coil and the circuit breaker coil through the excitation signal module; testing the contact performance of the relay through the contact signal module; testing the insulation performance of the secondary circuit of the circuit breaker through the insulation test module, and testing the mechanical characteristics of the circuit breaker through the circuit breaker test module; Using the central unit control / acquisition module to collect and condition the test data of the contact signal module, insulation test module, and circuit breaker test module, and evaluating the comprehensive state of the circuit breaker.

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