Online relay performance tester and testing method

Abstract

The invention relates to the technical field of relay detection, in particular to an online relay performance tester and a testing method. The online relay performance tester comprises a test host and further comprises a plug tool, the plug tool comprises a probe fixing frame and at least two elastic probes installed on the probe fixing frame, and the at least two elastic probes are used for elastically abutting against at least two contacts of a tested relay respectively; and the cable is used for electrically connecting the at least two elastic probes with the test host respectively. According to the invention, the tested relay is connected through the plug tool, so that the performance test of the relay can be completed without dismounting the relay when the relay is measured. Problems of low efficiency and easy wrong connection due to human factors in relay detection are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of relay detection, and in particular to an online relay performance tester and a testing method. Background Art

[0002] The medium voltage relays in nuclear power plants are non-pluggable. Each time they are inspected, they need to be disconnected and manually checked with a multimeter, and then reconnected. Due to the large number of relays in the medium voltage panel, each relay needs to be disconnected and wired, which is inefficient and prone to wiring errors. In addition, manual verification with a multimeter also has problems such as low accuracy, difficulty in recording, and easy loss. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an online relay performance tester and a testing method.

[0004] The technical solution adopted by the present invention to solve the technical problem is: an online relay performance tester, including a test host, and also including:

[0005] A plug fixture, the plug fixture comprising a probe fixing frame and at least two elastic probes mounted on the probe fixing frame, the at least two elastic probes being used to elastically abut against at least two contacts of a relay to be tested, respectively; and

[0006] A cable electrically connects the at least two elastic probes to the test host respectively.

[0007] In some embodiments, the plug tool further comprises:

[0008] A bracket, wherein the probe holder is disposed in the bracket and can move back and forth between a first position and a second position in the bracket; and when the probe holder is located at the first position, the contact ends of the at least two elastic probes are exposed from the bracket; when the probe holder is located at the second position, the contact ends of the at least two elastic probes are retracted into the bracket;

[0009] an elastic component, disposed between the probe fixing frame and the bracket, to elastically keep the probe fixing frame at the second position; and

[0010] A driving mechanism, one end of which is connected to the probe fixing frame and the other end of which is exposed outside the bracket, is used to drive the probe fixing frame to overcome the elastic force of the elastic component and move from the second position to the first position.

[0011] In some embodiments, the driving mechanism includes a driving rod and a pressure piece, the driving rod is axially movable and passes through the bracket, and the moving direction of the driving rod is parallel to the moving direction of the probe fixing frame; one end of the driving rod is connected to the probe fixing frame, and the other end of the driving rod is exposed from the bracket and connected to the pressure piece.

[0012] In some embodiments, the at least two elastic probes include a plurality of elastic probes, which are mounted on the probe fixing frame and are divided into at least two rows to elastically abut against at least two rows of contacts of the relay under test, respectively.

[0013] In some embodiments, the test host includes a high-speed data acquisition instrument, a programmable power supply, a measurement module, and a switching matrix;

[0014] The high-speed data acquisition instrument is electrically connected to the program-controlled power supply and the switching matrix respectively;

[0015] The measuring module is electrically connected to the programmable power supply and the switching matrix respectively;

[0016] The switching matrix is ​​electrically connected to the at least two probes respectively through the cables.

[0017] In some embodiments, the programmable power supply includes a DC programmable power supply and a lithium battery; the DC programmable power supply supplies power to the relay, and the lithium battery is connected to the DC programmable power supply.

[0018] In some embodiments, the measurement module includes a coil resistance measurement module and a coil current measurement module, a coil resistance measurement module, and a coil current measurement module;

[0019] The coil resistance measurement module, the coil current measurement module, the coil resistance measurement module and the coil current measurement module are respectively connected to the switching matrix.

[0020] In some embodiments, the test host further includes an isolation fence, which is respectively connected to the switching matrix and the plug fixture to isolate the relay signal transmitted by the plug fixture.

[0021] An online relay performance testing method is also provided, comprising the following steps: utilizing at least two elastic probes in a plug tooling of an online relay performance tester described in any one of the first four items above to elastically abut against the at least two contacts of the relay under test respectively, so that the online relay performance tester is connected to the relay under test, thereby realizing online testing of the relay under test.

[0022] In some embodiments, the test host includes a high-speed data acquisition instrument, a programmable power supply, a measurement module and a switching matrix, the high-speed data acquisition instrument is electrically connected to the programmable power supply and the switching matrix respectively, the measurement module is electrically connected to the programmable power supply and the switching matrix respectively, and the switching matrix is ​​electrically connected to the at least two probes through the cable respectively; the online relay performance test method also includes the following steps:

[0023] The switching matrix in the test host of the online relay performance tester receives the test instruction;

[0024] The switching matrix switches the connection between the high-speed data acquisition instrument, the program-controlled power supply, the measurement module and the plug fixture in the online relay performance tester according to the test instruction;

[0025] The measuring module sends a corresponding electrical signal according to the test instruction, and the electrical signal is transmitted to the plug fixture through the switching matrix;

[0026] The measured relay is transmitted to the measured relay through the plug tool, thereby realizing different measurement functions to measure the measured relay.

[0027] The implementation of the present invention has the following beneficial effects:

[0028] The present invention connects the relay through the plug fixture, so that when measuring the relay, the performance test of the relay can be completed without removing the relay. It avoids the problem that the wiring efficiency is low and the human error is easy to be connected when the relay is tested. At the same time, the elastic probe still has a good contact effect even if the contacts of the relay are not completely in the same plane. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0030] Figure 1 A longitudinal cross-sectional view of a plug tooling in one embodiment;

[0031] Figure 2 is a three-dimensional diagram of a plug tooling in one embodiment;

[0032] Figure 3 is a three-dimensional exploded view of a plug tooling in one embodiment;

[0033] Figure 4 is a perspective exploded view of a plug tooling with a cable connector in one embodiment;

[0034] Figure 5 A schematic diagram of a programmable power supply module in one embodiment;

[0035] Figure 6A schematic diagram of a four-wire resistance measurement principle in one embodiment;

[0036] Figure 7 A first principle diagram of an isolation gate in an embodiment;

[0037] Figure 8 A second principle diagram of an isolation gate in an embodiment;

[0038] Fig. 9 is a third principle diagram of an isolation barrier in one embodiment;

[0039] Fig.10 A schematic diagram of an online relay performance tester in one embodiment;

[0040] Fig.11 A schematic diagram of a test host and a display in one embodiment. DETAILED DESCRIPTION

[0041] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0042] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0043] An online relay performance tester provided by an embodiment of the present invention can be applied to the online testing of the medium-voltage plate relay in a nuclear power plant, and can include a test host, a plug fixture, and a cable. The cable connects the plug fixture to the test host, providing convenience for the movement of the plug fixture. In this way, when testing the relay, it is only necessary to move the plug fixture to the vicinity of the relay for docking, without removing the relay and placing it on the test host for testing. The length of the cable can be determined as needed.

[0044] The plug tooling comprises a probe fixing frame and at least two elastic probes installed on the probe fixing frame. The at least two elastic probes are used for elastically contacting at least two contacts of the relay to be tested.

[0045] Optionally, a spring probe holder is provided on the probe holder, and the elastic probe is fixed in the probe holder by a spring, so that the probe can be replaced relatively quickly. The elastic probe can also be fixed on the probe holder by magnetic adsorption force, which is suitable for occasions where testing or measurement needs to be performed at a specific position, which is convenient and fast.

[0046] Furthermore, the elastic probe may be fixed on the probe fixing frame by welding, gluing or the like.

[0047] The cables electrically connect the at least two elastic probes to the test host respectively.

[0048] In some scenarios, the elastic probe is connected to the cable by welding.

[0049] Furthermore, the elastic probe and the cable may be fixedly connected by snapping.

[0050] Each elastic probe also has a certain degree of scalability, and the elastic probe can be connected to relay contacts that are not in the same plane.

[0051] The present invention can complete various performance tests of the relay under test without disassembling the relay under test.

[0052] In some executable embodiments, such as Figure 1 and Figure 2 As shown, the plug tooling also includes a bracket 10, an elastic component 50 and a driving mechanism 40. In the figure, 10 is the bracket 10, 20 is the probe fixing frame 20, 30 is the elastic probe 30, and 40 is the driving mechanism 40.

[0053] The bracket 10, the probe holder 20 is arranged in the bracket 10, and can move back and forth between a first position and a second position in the bracket 10; and when the probe holder 20 is located at the first position, the contact ends of at least two elastic probes 30 are exposed from the bracket 10; when the probe holder 20 is located at the second position, the contact ends of at least two elastic probes 30 are hidden by the bracket 10.

[0054] Specifically, the probe fixing frame 20 and the plug tooling housing are slidably matched, and the probe fixing frame 20 can move down smoothly when the pressing piece is pressed, so that the elastic probe 30 can pass through the housing.

[0055] In some scenarios, a guide groove may be further provided on the plug tooling housing, and the edge of the probe holder 20 is embedded in the guide groove to ensure that the probe holder 20 does not deviate during the movement.

[0056] The elastic component 50 is disposed between the probe fixing frame 20 and the bracket 10 to elastically keep the probe fixing frame 20 at the second position.

[0057] The driving mechanism 40 has one end connected to the probe fixing frame 20 and the other end exposed outside the bracket 10 to drive the probe fixing frame 20 to move from the second position to the first position to overcome the elastic force of the elastic component.

[0058] In some executable embodiments, such as Figure 3As shown, the driving mechanism 40 includes a driving rod 42 and a pressing plate 41. The driving rod 42 is axially movable and penetrates the bracket 10, and the moving direction of the driving rod 42 is parallel to the moving direction of the probe fixing frame 20. One end of the driving rod 42 is connected to the probe fixing frame 20, and the other end of the driving rod 42 is exposed from the bracket 10 and connected to the pressing plate 41.

[0059] Specifically, the probe holder 20 is moved downward by pressing the pressing plate 41, so that the elastic probe 30 is exposed from the housing of the plug tooling and connected to the contact of the relay under test. The pressing plate 41 is pulled upward to drive the probe holder 20 to reset, so that the elastic probe 30 returns to its original position.

[0060] In this embodiment, the probe fixing frame 20 and the plug tooling housing are slidably matched, and the probe fixing frame 20 can move down smoothly when the pressing plate 41 is pressed, so that the elastic probe 30 can pass through the housing.

[0061] In an executable embodiment, the driving mechanism further includes: a guide rail 43 and a linear bearing 44 .

[0062] The linear bearing 44 is connected to the probe holder 20 and the driving rod 42. There is an opening between the linear bearing 44 and the probe holder 20; the guide rail 43 is located between the top and the bottom of the housing and passes through the opening of the linear bearing 44 and the probe holder 20.

[0063] Specifically, the linear bearing 44 is connected to the probe fixing frame 20 and the driving rod 42 by flange connection. The flange end of the linear bearing 44 is fixedly connected to the connecting surface of the probe fixing frame 20 and the driving rod 42 by screws, and the screw holes of the flange end are aligned with the screw holes on the probe fixing frame 20 and the driving rod 42, and then the screws are tightened to fix the linear bearing 44 to the two. The flange connection facilitates the subsequent maintenance of the plug tooling.

[0064] The linear bearing 44 and the guide rail 43 are combined to control the moving direction of the probe holder 20 within a preset range.

[0065] Specifically, both ends of the guide rail 43 are fixed between the top and bottom of the housing by screws or other fixing members to ensure the stability and rigidity of the guide rail 43 .

[0066] Optionally, the elastic component 50 is a spring.

[0067] The spring is located at the lower part of the probe fixing frame 20 and is sleeved on the guide rail 43 .

[0068] The spring is used to control the probe fixing frame 20 to return to its original position.

[0069] By pressing the pressing plate 41 against the pressing piece, the probe holder 20 moves downward, the main spring contracts, and the elastic probe 30 penetrates the housing of the plug tooling and connects with the contact of the relay under test. When the pressing plate 401 is released against the pressing piece, the spring resets, driving the probe holder 20 to reset, and the elastic probe 30 returns to its original position.

[0070] In this embodiment, the probe fixing frame and the plug tooling housing are slidably matched, and the probe fixing frame can move down smoothly when the pressing piece is pressed, so that the elastic probe can pass through the housing.

[0071] like Figure 3 As shown, the driving rod 42 of the driving mechanism 40 passes through the top housing 11 of the plug tooling and is connected to the linear bearing 44. The linear bearing 44 can be fixed on the control probe fixing frame 20.

[0072] The guide rail 43 is located inside the top shell 11 and the bottom shell 14 , and connects the top shell 11 and the bottom shell 14 .

[0073] Optionally, the guide rail 43 is located at the exact center of the inner side of the top shell 11 and the bottom shell 14 of the plug tooling.

[0074] There is an opening in the middle of the guide rail 43 , and a hole of the same size exists on the control probe fixing frame 20 at a corresponding position of the opening. The linear bearing 44 can drive the control probe fixing frame to move on the guide rail 43 through the opening and the hole.

[0075] The elastic probe 30 is located on the control probe fixing frame 20 , and an opening corresponding to the position of the elastic probe is opened on the bottom shell 14 of the plug tooling, and the elastic probe 30 can freely enter and exit the opening of the bottom shell 14 .

[0076] like Figure 4 As shown, the plug tool also includes a cable connector 60. In this embodiment, the cable connector 60 is installed on the left side of the plug tool. A hole is provided on the left side housing 13 of the plug tool to match the cable connector 60.

[0077] The plug tool is connected to the cable through the cable connector 60. The cable connector 60 is electrically connected to the elastic probe 30. Specifically, the cable connector 60 can be connected to the elastic probe 30 through an electric wire.

[0078] In some executable embodiments, the test host includes a high-speed data acquisition instrument, a programmable power supply, a measurement module and a switching matrix.

[0079] The high-speed data acquisition instrument is connected to the programmable power supply and the switching matrix.

[0080] The measuring module is connected with the programmable power supply and the switching matrix.

[0081] The switching matrix is ​​connected to the plug fixture via a cable.

[0082] Specifically, high-speed data acquisition instrument, programmable power supply, measurement module and switching matrix.

[0083] The high-speed data acquisition instrument operating system has an IO expansion bus that can connect digital (DIO) or analog (AIO) measurement and control boards. It has communication interfaces such as Ethernet, USB, serial port, and Bluetooth, and can directly output HDMI signals to display screens, etc.

[0084] The programmable power supply uses the 0~5V analog output signal (AO) provided by the high-speed data acquisition instrument as the control input. The output signal is continuously output between 0~300V to provide driving power for the relay. The circuit schematic diagram of the programmable power supply module is shown in Figure 5 shown.

[0085] The measurement module communicates via RS485 and can measure coil resistance, coil current, open / release voltage, contact resistance, open / release time, bounce time, etc.

[0086] The switching matrix is ​​designed to switch between various measurement functions. For example, when measuring coil resistance and contact resistance, the matrix connects the measurement module to the relay under test; when measuring the opening / release voltage or bounce, the matrix connects the high-speed data acquisition instrument, program-controlled power supply and the relay under test.

[0087] In some executable embodiments, the programmable power supply includes a direct-current programmable power supply and a lithium battery. The direct-current programmable power supply supplies power to the relay, and the lithium battery is connected to the direct-current programmable power supply.

[0088] Furthermore, the DC programmable power supply also supplies power to other modules in the test host. The lithium battery is used to supply power to the DC programmable power supply when there is no external power supply.

[0089] In some executable embodiments, the programmable power supply includes at least three direct current programmable power supplies.

[0090] The DC programmable power supplies are independent of each other and supply power to the high-speed data acquisition instrument, measurement module and switching matrix respectively.

[0091] When one of the DC programmable power supplies fails, it will not affect the normal operation of other power supplies. For example, if the power supply to the measurement module is short-circuited or overloaded, other power supplies can continue to supply power to the high-speed data acquisition instrument and the switching matrix, ensuring that some functions of the entire system are not affected and avoiding the entire online relay performance tester from being paralyzed due to a single power supply failure.

[0092] In some executable embodiments, the measurement module includes a coil resistance measurement module and a coil current measurement module, a contact resistance measurement module and a coil current measurement module.

[0093] Optional, such as Figure 6 As shown, the circuit principle of the contact resistance measurement module adopts the four-wire resistance measurement principle to measure the contacts of the relay under test.

[0094] The coil resistance measurement module, the coil current measurement module, the contact resistance measurement module and the coil current measurement module are respectively connected to the switching matrix.

[0095] Specifically, the coil resistance measurement module and the coil current measurement module are used in the relay to detect the physical state of the coil and monitor its working current respectively. The resistance measurement module determines whether the coil has faults such as open circuit or short circuit by measuring the resistance value of the coil, and evaluates whether its performance meets the design requirements, thereby helping maintenance and fault prevention. The current measurement module monitors the current in the coil in real time to ensure that the current is within a safe range, analyzes the circuit performance of the relay, and triggers the protection mechanism when the current is abnormal to prevent overload or underload, protecting the relay and related equipment.

[0096] In some executable embodiments, the test host further includes an isolation barrier.

[0097] The isolation barrier is connected to the switching matrix and the plug tooling.

[0098] The isolation barrier is used to isolate the relay signal transmitted by the plug fixture.

[0099] The circuit principle of the isolation barrier is as follows Figure 7-Figure 9 shown. Figure 7 It is the optocoupler isolation of the part of the control signal isolated by the optocoupler in the isolation barrier. Figure 8 In order to isolate the measurement signal in the isolation barrier, a relay is used as an isolation device. Fig. 9 This is the circuit principle of isolating the programmable power supply in the isolation barrier.

[0100] The test signal is isolated at the isolation barrier. If there is an external power supply, only a very small part of the device will be damaged, and no damage will be caused to other internal circuits.

[0101] In some executable embodiments, the test host also includes a display screen.

[0102] The display screen is connected to the high-speed data acquisition instrument. The display screen is used to display the test results collected by the high-speed data acquisition instrument.

[0103] like Fig.10 As shown, the online relay performance tester includes: a test host and a plug tool.

[0104] The test host includes: isolation barrier, mainboard function switching matrix (switching matrix), four contact resistance measurement modules, coil resistance measurement module, mainboard measurement and control module, DC coil current (coil current measurement module), three DC programmable power supplies, high-speed data acquisition instrument and display.

[0105] The isolation barrier is connected to the plug fixture via a cable.

[0106] The high-speed data acquisition instrument is connected to the mainboard measurement and control module, the DC coil current (coil current measurement module), the contact resistance measurement module and the coil resistance measurement module. The display is connected to the high-speed data acquisition instrument via HDMI. Fig.11 As shown, the display is hinged on the outside of the test host.

[0107] The three DC programmable power supplies are independent of each other and are used to supply power to the mainboard measurement and control module, the coil measurement module (DC coil current (coil current measurement module), the contact resistance measurement module and the coil resistance measurement module) and the mainboard function switching matrix (switching matrix).

[0108] High-speed data loggers include USB interface, MCC128 and MCC152.

[0109] The MCC128 has 16-bit resolution and includes 8 SE / 4DIFF analog inputs with a maximum sampling rate of 100kS / s. It also includes multiple ranges to enable accurate relay measurements.

[0110] The MCC152 provides two 12-bit analog outputs and eight 5V or 3.3V DIO channels to create a complete multi-function Measurement and control systems.

[0111] The embodiment of the present invention further provides a relay performance testing method, which uses any of the above-mentioned online relay performance testers to test the relay.

[0112] In some executable embodiments, the test host includes a high-speed data acquisition instrument, a program-controlled power supply, a measurement module and a switching matrix, the high-speed data acquisition instrument is electrically connected to the program-controlled power supply and the switching matrix respectively, the measurement module is electrically connected to the program-controlled power supply and the switching matrix respectively, and the switching matrix is ​​electrically connected to at least two probes through cables respectively; the online relay performance test method also includes:

[0113] A switching matrix in a test host of an online relay performance tester receives a test instruction;

[0114] The switching matrix switches the connection between the high-speed data acquisition instrument, program-controlled power supply, measurement module and plug fixture in the online relay performance tester according to the test instructions;

[0115] The measurement module sends the corresponding electrical signal according to the test instruction, and the electrical signal is transmitted to the plug tooling through the switching matrix.

[0116] In some embodiments, the electrical signal is transmitted to the plug tooling through the switch matrix and the isolation barrier.

[0117] The data is transmitted to the relay under test through the plug tooling, thereby realizing different measurement functions to measure the relay under test.

[0118] Specifically, the elastic probe in the plug tooling of the online relay performance tester is brought into contact with the relay contact of the relay, so that the online relay performance tester is connected to the relay.

[0119] By utilizing the switching matrix in the test host of the online relay performance tester, the connection between the high-speed data acquisition instrument, the programmable power supply, the measurement module and the plug fixture in the online relay performance tester is switched, so as to realize different measurement functions to measure the relay.

[0120] It can be understood that all tests consist of three steps. The first step: matrix test host function switching line, which is very similar to the line switching of a programmable telephone; the second step: manually press the plug tool to connect the elastic probe with the relay contact; the third step: the software selects the functional test item and triggers the test button through the plug tool to achieve various test requirements of various test devices.

[0121] The above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. An online relay performance tester, comprising a test host, characterized in that: Also includes: A plug fixture, the plug fixture comprising a probe fixing frame and at least two elastic probes mounted on the probe fixing frame, the at least two elastic probes being used to elastically abut against at least two contacts of a relay under test respectively; as well as A cable electrically connects the at least two elastic probes to the test host respectively.

2. The on-line relay performance tester according to claim 1, characterized in that: The plug tool also includes: A bracket, wherein the probe holder is disposed in the bracket and can move back and forth between a first position and a second position in the bracket; and when the probe holder is located at the first position, the contact ends of the at least two elastic probes are exposed from the bracket; when the probe holder is located at the second position, the contact ends of the at least two elastic probes are retracted into the bracket; an elastic component, disposed between the probe fixing frame and the bracket, to elastically keep the probe fixing frame at the second position; and A driving mechanism, one end of which is connected to the probe fixing frame and the other end of which is exposed outside the bracket, is used to drive the probe fixing frame to overcome the elastic force of the elastic component and move from the second position to the first position.

3. The on-line relay performance tester according to claim 2, characterized in that: The driving mechanism includes a driving rod and a pressure piece. The driving rod is axially movable and penetrates the bracket, and the moving direction of the driving rod is parallel to the moving direction of the probe fixing frame. One end of the driving rod is connected to the probe fixing frame, and the other end of the driving rod is exposed from the bracket and connected to the pressure piece.

4. The on-line relay performance tester according to claim 1, characterized in that: The at least two elastic probes include a plurality of elastic probes, which are mounted on the probe fixing frame and are divided into at least two rows so as to elastically abut against at least two rows of contacts of the relay under test respectively.

5. The on-line relay performance tester according to any one of claims 1 to 4, characterized in that: The test host includes a high-speed data acquisition instrument, a programmable power supply, a measurement module and a switching matrix; The high-speed data acquisition instrument is electrically connected to the program-controlled power supply and the switching matrix respectively; The measuring module is electrically connected to the programmable power supply and the switching matrix respectively; The switching matrix is ​​electrically connected to the at least two probes respectively through the cables.

6. The on-line relay performance tester according to claim 5, characterized in that: The programmable power supply includes a direct-current programmable power supply and a lithium battery; the direct-current programmable power supply is electrically connected to the switching matrix to supply power to the relay; the lithium battery is electrically connected to the direct-current programmable power supply.

7. The on-line relay performance tester according to claim 5, characterized in that: The measurement module includes a coil resistance measurement module, a coil current measurement module, a contact resistance measurement module and a coil current measurement module; The coil resistance measurement module, the coil current measurement module, the contact resistance measurement module and the coil current measurement module are respectively connected to the switching matrix.

8. The on-line relay performance tester according to claim 5, characterized in that: The test host further includes an isolation fence, which is respectively connected to the switching matrix and the plug fixture to isolate the relay signal transmitted by the plug fixture.

9. An online relay performance testing method, characterized in that: The method comprises the following steps: utilizing at least two elastic probes in a plug tooling of the online relay performance tester according to any one of claims 1 to 4 to elastically abut against the at least two contacts of the relay under test respectively, so that the online relay performance tester is connected to the relay under test, thereby realizing online testing of the relay under test.

10. The on-line relay performance testing method according to claim 9, characterized in that: The test host comprises a high-speed data acquisition instrument, a program-controlled power supply, a measurement module and a switching matrix, wherein the high-speed data acquisition instrument is electrically connected to the program-controlled power supply and the switching matrix respectively, the measurement module is electrically connected to the program-controlled power supply and the switching matrix respectively, and the switching matrix is ​​electrically connected to the at least two probes respectively through the cable; the online relay performance test method further comprises the following steps: The switching matrix in the test host of the online relay performance tester receives the test instruction; The switching matrix switches the connection between the high-speed data acquisition instrument, the program-controlled power supply, the measurement module and the plug fixture in the online relay performance tester according to the test instruction; The measuring module sends a corresponding electrical signal according to the test instruction, and the electrical signal is transmitted to the plug fixture through the switching matrix; The measured relay is transmitted to the measured relay through the plug tool, thereby realizing different measurement functions to measure the measured relay.

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