Aging degree detection and service life evaluation device for medium-voltage protection card

Abstract

The utility model relates to an aging degree detection and service life evaluation device for a medium-voltage protection card, which comprises a test cabinet and a terminal device, and is characterized in that the test cabinet comprises a rack, a distribution board, a test signal source, a test controller and a signal collector, and the test signal source, the test controller and the signal collector are arranged on the rack; the test signal source is electrically connected with the test controller and the to-be-tested medium-voltage protection card, generates a test signal according to a test instruction of the test controller and sends the test signal to the to-be-tested medium-voltage protection card; the signal collector is electrically connected with the to-be-tested medium-voltage protection card, and collects a feedback signal generated by the to-be-tested medium-voltage protection card according to the test signal; the signal collector is also connected with the test controller and sends the feedback signal to the test controller; the terminal device is in communication connection with the test controller, sends a test instruction to the test controller and receives a feedback signal received by the test controller. The off-line test of the to-be-tested medium-voltage protection card is realized, the interference of surrounding devices caused by field measurement is eliminated, and more reliable service life prediction can be conveniently obtained.

Description

Technical Field

[0001] This utility model relates to the field of medium-pressure protection cards in nuclear power plants, and in particular to a device for detecting the aging degree and life assessment of medium-pressure protection cards. Background Technology

[0002] Medium-voltage protection devices, also known as medium-voltage protection units, are protective devices used in medium-voltage power systems. They integrate multiple protection functions to monitor and control abnormal conditions in the circuit, such as overloads and short circuits, to protect electrical equipment from damage and ensure the safety of equipment and personnel. They play a crucial role in nuclear power plants. Nuclear reactors and various other equipment in nuclear power plants require electrical equipment, which operates under long-term, high-load conditions. Medium-voltage protection devices can detect and protect electrical equipment, enabling timely circuit disconnection in abnormal conditions to prevent equipment damage or accidents, thus ensuring the safe operation of the nuclear power plant.

[0003] Medium-voltage protection cards are complex and sophisticated electrical devices in nuclear power plants. Their manufacturing and maintenance are costly, and replacement requires substantial financial investment. Due to the high concentration of equipment and systems, these cards often have close connections with other devices and systems. Frequent maintenance or replacement may necessitate the re-commissioning and verification of the entire system, which not only requires more time and money but may also impact the normal operation of the nuclear power plant. Medium-voltage protection cards are generally custom-designed for nuclear power plants, and the supply chain may be constrained, leading to issues such as insufficient supply or long lead times during replacement.

[0004] For the reasons mentioned above, aging detection and lifespan assessment of medium-voltage protection cards are crucial. Currently, the main aging detection methods used in the power industry include: online thermal infrared detection of operating medium-voltage protection cards at nuclear power plant sites using infrared thermal imagers. By analyzing the thermal infrared images, it is possible to determine whether the equipment has abnormalities such as overheating, hot spots, or hot patches, thereby assessing the aging degree and operational status of the equipment. However, this detection method is easily affected by interference from devices nearby, resulting in low detection accuracy. Utility Model Content

[0005] The technical problem this invention aims to solve is that when monitoring the aging status of medium-voltage protection cards online, the system is easily affected by the surrounding environment, resulting in poor detection accuracy and inaccurate analysis results.

[0006] The technical solution adopted by this utility model to solve its technical problem is: to provide a device for detecting the aging degree and life assessment of medium-voltage protection cards, including a test cabinet and terminal equipment, wherein...

[0007] The test cabinet includes: a rack, a wiring board, a test signal source, a test controller, and a signal acquisition device mounted on the rack;

[0008] The medium-voltage protection card to be tested can be detached and installed on the frame;

[0009] The test signal source, the test controller, and the signal acquisition device are connected to the patch panel via cables, and signal exchange is performed through the patch panel.

[0010] The test signal source is electrically connected to the test controller and the medium-voltage protection card under test, respectively, and generates and sends a test signal to the medium-voltage protection card under test according to the test command of the test controller.

[0011] The signal acquisition device is electrically connected to the medium-voltage protection card under test, and acquires the feedback signal generated by the medium-voltage protection card under test based on the test signal;

[0012] The signal acquisition device is also connected to the test controller and sends the feedback signal to the test controller;

[0013] The terminal device is communicatively connected to the test controller, sends the test command to the test controller, and receives the feedback signal received by the test controller.

[0014] Preferably, the test cabinet further includes a medium-voltage card adapter, one end of which is connected to the signal acquisition unit and the test signal source via a cable, and the other end is connected to the medium-voltage protection card under test via a card slot.

[0015] Preferably, the test cabinet further includes a front-end unit, which is connected to the signal acquisition unit and the test signal source via a wired connection, and communicates with the terminal device via a wired and / or wireless connection.

[0016] Preferably, the wiring board is provided with terminal blocks that match the cable terminals of the test signal source, test controller, signal acquisition unit, medium voltage card adapter, and preamplifier, wherein the terminal blocks are detachably mounted on the wiring board.

[0017] Preferably, the rack is provided with a fixedly connected tray for placing the test signal source, test controller, signal acquisition unit, medium voltage card adapter, preamplifier, and wiring board. A cable routing channel is provided between the tray and the inner wall of the test cabinet to guide and fix the cables.

[0018] Preferably, the bottom of the tray is provided with protective pads on both sides.

[0019] Preferably, the test controller includes: a main control board and a switch output board, wherein,

[0020] The main control board is communicatively connected to the terminal device;

[0021] The main control board is also electrically connected to the signal acquisition unit for receiving the feedback signal;

[0022] The switch output board is connected between the main control board and the test signal source, and is used to forward the control commands sent by the main control board to the test signal source.

[0023] Preferably, the test signal source includes: a relay protection tester that provides AC or DC voltage or AC or DC current that varies in steps, and / or an adjustable power supply that provides adjustable DC voltage or current.

[0024] Preferably, the signal acquisition device includes: a temperature sensor installed on the side or bottom inside the test cabinet to acquire temperature data of the medium-voltage protection card under test; and a current sensor electrically connected to the medium-voltage protection card under test to acquire operating current data of the medium-voltage protection card under test and a voltage sensor to acquire operating voltage data of the medium-voltage protection card under test.

[0025] Preferably, the number of card slots is one or more, and they can be detachably installed on the medium-pressure card adapter.

[0026] The present invention has the following advantages: by controlling the test signal source to simulate the field signal and send it to the medium-voltage protection card under test by the test controller, and controlling the signal acquisition device to collect the feedback signal of the medium-voltage protection card under test, the present invention simulates the actual working condition of the medium-voltage protection card under test and performs offline testing on the medium-voltage protection card under test, which solves the problem that field testing is easily interfered with by surrounding devices and helps to improve the accuracy of aging detection and life assessment.

[0027] Furthermore, it enables precise acquisition of temperature and electrical signals during the operation of medium-pressure protection cards in nuclear power plants. It is highly targeted and can analyze the aging status of cards and internal components through temperature and electrical signal data. Processing the obtained aging status data can yield more reliable lifespan predictions. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0029] Figure 1 This is a schematic diagram of the structure of a medium-pressure protection card aging degree detection and life assessment device according to the present invention;

[0030] Figure 2This is a three-dimensional assembly schematic diagram of an embodiment of a medium-pressure protection card aging degree detection and life assessment device of this utility model;

[0031] Figure 3 This is a schematic diagram of the cabinet structure of an embodiment of a device for detecting the aging degree and life assessment of medium-voltage protection cards according to this utility model;

[0032] Among them, 204, switch; 205, relay protection tester; 206, patch panel; 207, data acquisition controller; 208, front-end processor; 209, medium-voltage card adapter; 210, adjustable power supply; 211, medium-voltage protection card receiving cavity; 212, card slot; 213, cabinet wall; 214, tray; 215, cable tray. Detailed Implementation

[0033] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0034] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0035] like Figure 1 As shown, in the first embodiment of the medium-voltage protection card aging degree detection and life assessment device of this utility model, a test cabinet 200 and a terminal device 100 are included. The test cabinet includes a rack, a wiring board 206, a test signal source 202 mounted on the rack, a test controller 201, and a signal acquisition device 203. The medium-voltage protection card 300 under test is detachably mounted on the rack. The test signal source 202, the test controller 201, and the signal acquisition device 203 are connected to the wiring board 206 via cables, and signal exchange is performed through the wiring board 206. The test signal source 202 is electrically connected to both the test controller 201 and the medium-voltage protection card 300 under test, generating and sending test signals to the medium-voltage protection card 300 under test according to the test commands from the test controller 201. The signal acquisition device 203 is electrically connected to the medium-voltage protection card 300 under test, collecting the feedback signals generated by the medium-voltage protection card 300 under test based on the test signals. The signal acquisition unit 203 is also connected to the test controller 201 and sends feedback signals to the test controller 201; the terminal device 100 is communicatively connected to the test controller 201, sends test commands to the test controller 201 and receives feedback signals received by the test controller 201.

[0036] In other embodiments, the test cabinet also includes a medium-voltage card adapter 209 and a front-end processor 208.

[0037] like Figure 2 and Figure 3 As shown, the rack is provided with multiple fixedly connected trays 214 for placing a relay protection tester 205, an adjustable power supply 210, a test controller 201, a signal acquisition unit 203, a medium-voltage card adapter 209, a preamplifier 208, and a patch panel 206. Each tray and the cabinet wall form a receiving cavity for each device, such as a medium-voltage protection card receiving cavity 211 for placing the medium-voltage protection card under test. The rack is provided with a cabinet door, and cabinet walls are provided on the left and right sides of the rack opposite the cabinet door and on the side away from the cabinet door. A cable tray 215 is provided between the tray 214 and the cabinet wall 213 on the side away from the cabinet door for guiding and fixing cables. In other embodiments, the cable tray 215 can also be provided on the left and right cabinet walls 213, or a recessed cable tray 215 can be formed in the cabinet wall 213.

[0038] Furthermore, protective pads are provided on both sides of the bottom of tray 214. These protective pads can be rubber elastic pads or other elastic pads, and can be adhered to the bottom of the tray or fixed to the bottom of the tray with screws. The protective pads are used to protect the relay protection tester 205, adjustable power supply 210, test controller 201, signal acquisition unit 203, medium-voltage card adapter 209, preamplifier 208, wiring board 206, and other devices placed in the receiving cavity, providing protection and shock absorption. Providing protective pads on both sides of the bottom of the tray protects the devices in both the upper and lower receiving cavities.

[0039] Specifically, the test controller 201 includes a main control board and a switch output board. The main control board is communicatively connected to the terminal device 100 and electrically connected to the signal acquisition unit 203 to receive feedback signals. The switch output board is connected between the main control board and the test signal source 202 to forward control commands sent from the main control board to the test signal source 202.

[0040] The test signal source 202 includes: a relay protection tester 205 that provides AC or DC voltage or AC or DC current that varies in steps, and / or an adjustable power supply 210 that provides adjustable DC voltage or adjustable DC current. Specifically, the relay protection tester 205 and the adjustable power supply 210 are simultaneously installed in the cabinet to provide corresponding AC or DC voltage and AC or DC current to the medium-voltage protection card 300 under test as test signals. In other embodiments, the relay protection tester or the adjustable power supply may not be provided.

[0041] The signal acquisition unit 203 includes: a temperature sensor installed on the side or bottom inside the test cabinet to acquire temperature data of the medium-voltage protection card 300 under test; a current sensor electrically connected to the medium-voltage protection card 300 under test to acquire operating current data of the medium-voltage protection card 300 under test; and a voltage sensor electrically connected to the medium-voltage protection card 300 under test to acquire operating voltage data of the medium-voltage protection card 300 under test.

[0042] The temperature sensor uses wired transmission, and its probe is mounted on the side wall of the medium-pressure protection card receiving cavity 211. When the medium-pressure protection card under test is placed into the receiving cavity 211, the probe can measure the temperature of the detection point inside the medium-pressure protection card 300. The transmission cable of the temperature sensor is fixed in the wiring trough 215, and the collected temperature signal is sent to the signal acquisition unit 203 through the cable. Types of sensors include thermocouple sensors, resistance temperature detectors (RTDs), and infrared temperature sensors. The temperature probe non-contactly collects the temperature of the detection point inside the medium-pressure protection card 300. The type of temperature sensor selected depends on specific application requirements, power consumption requirements, and cost budget.

[0043] The current sensor uses wired transmission. The sensor is electrically connected to the current pin of the detection point inside the medium-voltage protection card 300 under test. The transmission cable of the current sensor is fixed inside the cable tray 215, and the acquired current signal is sent to the signal acquisition unit 203 via the cable. The current sensor can be a Hall effect current sensor, current transformer, shunt, etc., used to detect the current data at the detection point inside the medium-voltage protection card 300 under test. The specific type of current sensor selected depends on the specific application requirements, power consumption requirements, and cost budget.

[0044] The voltage sensor uses wired transmission. The sensor is electrically connected to the current pin of the detection point inside the medium-voltage protection card 300 under test. The transmission cable of the voltage sensor is fixed inside the cable tray 215, and the acquired voltage signal is sent to the signal acquisition unit 203 via the cable. The voltage sensor can be a Hall effect voltage sensor, voltage transformer, resistive voltage divider, etc., used to detect the voltage data at the detection point inside the medium-voltage protection card 300 under test. The specific type of voltage sensor selected depends on the specific application requirements, power consumption requirements, and cost budget.

[0045] In this embodiment, a device for detecting the aging degree and life assessment of medium-voltage protection cards is constructed. Specifically, a test command is sent from a terminal device 100 to a test controller 201. The test controller 201 forwards the test command to a relay protection tester 205 and an adjustable power supply 210. The relay protection tester 205 and the adjustable power supply 210 generate test signals according to the test command and send them to the medium-voltage protection card 300 under test. At the same time, the test controller 201 collects the feedback signal of the medium-voltage protection card 300 under test through a signal acquisition device 203 and sends the feedback signal to the terminal device 100 to analyze the aging degree of the medium-voltage protection card 300 under test and predict its service life.

[0046] The technical solution of this embodiment can perform offline testing on the medium-voltage protection card under test. The test controller controls the test signal source to simulate the field signal and send it to the medium-voltage protection card under test. The signal acquisition device is controlled to collect the feedback signal of the medium-voltage protection card under test, simulating the actual working condition of the medium-voltage protection card under test. This offline testing of the medium-voltage protection card under test solves the problem that field testing is easily affected by interference from surrounding devices, and helps to improve the accuracy of aging detection and life assessment.

[0047] In an optional embodiment, one end of the medium-voltage card adapter 209 is connected to the signal acquisition unit 203, the relay protection tester 205, and the adjustable power supply 210 via a cable, and the other end is connected to the medium-voltage protection card 300 under test via a card slot.

[0048] In this embodiment, the medium-voltage protection card 300 under test is connected to the test cabinet via a medium-voltage card adapter 209. One end of the medium-voltage card adapter 209 is connected to the corresponding position in the cabinet via a universal interface, and the other end is provided with a card slot that adapts to medium-voltage protection cards of different interface models. Implementing this embodiment allows medium-voltage protection cards with different interfaces to be connected to the test cabinet. Furthermore, the medium-voltage card adapter 209 is equipped with a data acquisition cable for different models of the medium-voltage protection card 300 under test. This data acquisition cable is electrically connected to the parameter acquisition point of the medium-voltage protection card 300 under test, acquiring voltage, current, and other signals from the test position of the medium-voltage protection card 300. The cable can also be directly connected to the signal acquisition unit 203 without additional wiring, making it more convenient to acquire feedback signals from the medium-voltage protection card 300 under test.

[0049] In one alternative embodiment, such as Figure 2 As shown, there are one or more card slots 212, which can be detachably installed on the medium-voltage card adapter 209. In this embodiment, only one medium-voltage card adapter 209 is needed to adapt to medium-voltage protection cards with more interface models, thus having a wider range of applications.

[0050] like Figure 2 As shown, in another embodiment of the medium-voltage protection card aging degree detection and life assessment device of this utility model, the front-end unit 208 is connected to the signal acquisition unit 203, the relay protection tester 205, and the adjustable power supply 210 via a wired connection, and is connected to the terminal device 100 via a wired and / or wireless connection. In addition, the front-end unit 208 is also connected to the signal acquisition unit 203, the relay protection tester 205, and the adjustable power supply 210 via a switch 204 for forwarding data packets between different devices.

[0051] Furthermore, the relay protection tester 205, adjustable power supply 210, test controller 201, signal acquisition unit 203, medium-voltage card adapter 209, and front-end processor 208 are connected to the wiring board 206 via cables, and signal exchange is performed through the wiring board 206. The wiring board 206 is provided with multiple terminal blocks that are respectively matched with the cable terminals of the relay protection tester 205, adjustable power supply 210, test controller 201, signal acquisition unit 203, medium-voltage card adapter 209, and front-end processor 208, wherein the terminal blocks can be detachably installed on the wiring board 206.

[0052] In this embodiment, the test cabinet is connected to the terminal device 100 via a front-end unit 208. The connection between the front-end unit 208 and the terminal device 100 includes wired and / or wireless communication connections, which can adapt to different application scenarios. The various devices in the cabinet are connected via a patch panel 206, which allows for more reasonable cabling and easier expansion of the connection range. If needed, new devices can be directly connected to the patch panel 206, and the maintenance of the devices is also more convenient.

[0053] The application process of the medium-voltage protection card aging degree detection and life assessment device provided by this utility model is as follows:

[0054] Place the medium-voltage protection card to be tested into the medium-voltage protection card receiving cavity.

[0055] Users perform experimental settings on the human-computer interaction interface of terminal device 100.

[0056] The system prompts the user to insert the cable into the corresponding slot of the medium-voltage protection card to be tested according to the user's test settings, turn on the corresponding power switch on the cabinet, and complete the pre-test checks.

[0057] After the pre-test preparations are completed, click the test case configuration button on the human-computer interaction interface, and the terminal device 100 will send the test cases to the front-end machine 208. The test cases corresponding to this utility model include the configuration of parameters such as the output signal type, start time, and stop time of the A-phase, B-phase, and C-phase of the relay protection tester; the configuration of parameters such as the output voltage, start time, and stop time of the adjustable power supply 210; the configuration of parameters such as the start time and stop time of the 24V switching power supply; and the configuration of parameters such as the input and output of general electrical equipment cards and the pin signal type and input / output channel of components.

[0058] The front-end processor 208 parses the test cases into control commands and sends them to the relay protection tester 205, the adjustable power supply 210, and the acquisition controller 207 respectively. Among them, the power excitation signal configuration information is sent to the relay protection tester 205 and the adjustable power supply 210, and the power excitation signal input switch control and card pin and component response acquisition channel configuration is sent to the acquisition controller 207.

[0059] The adjustable power supply 210 outputs DC voltage according to the power setting command.

[0060] The feedback signal from the medium-voltage protection card is sent to the acquisition controller via the terminals on the corresponding adapter.

[0061] The acquisition controller 207 sends the acquired feedback signal to the main control board for processing. The main control board then sends the processed response data to the front-end processor 208, which stores the data.

[0062] The terminal device 100 can further process the response data, read it into a waveform file, and display it on the human-computer interaction interface.

[0063] Terminal device 100 retrieves data under standard operating conditions, compares and analyzes it with feedback signals obtained from testing, determines the card's function and component aging status, and predicts its lifespan. For example, a temperature deviation within ±2℃ and a voltage / current deviation within ±3% correspond to an estimated aging range of 0-20%, indicating the card is new; a temperature deviation of ±2℃ to ±5℃ and a voltage / current deviation of ±3% to ±10% correspond to an estimated aging range of 20-50%, indicating slight aging; a temperature deviation of ±5℃ to ±10℃ and a voltage / current deviation of ±10% to ±20% correspond to an estimated aging range of 50-80%, indicating moderate aging requiring maintenance; and a temperature deviation exceeding ±10℃ and a voltage / current deviation exceeding ±20% correspond to an estimated aging range of 80-100%, indicating severe aging requiring replacement.

[0064] These operational steps involve long-term online monitoring to obtain data in real time. The results are displayed and reminded in a user-friendly manner, enabling users to easily obtain the aging status and life prediction of the medium-pressure protection cards in nuclear power plants. There are also detailed aging status analysis and life assessment reports, as well as an alarm system, which includes a green indicator light for normal card status, a yellow indicator light for severely aged cards, and a red indicator light for damaged cards, to help staff deal with problems in a timely manner.

[0065] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A device for detecting the aging degree and evaluating the life of a medium voltage protection card, characterized in that, The test cabinet and terminal equipment are included, wherein, The test cabinet includes a rack, a wiring board, a test signal source installed on the rack, a test controller and a signal collector; The to-be-tested medium-voltage protection card is detachably installed on the rack; The test signal source, the test controller and the signal collector are connected on the wiring board through cables, and signal exchange is performed through the wiring board; the test signal source is electrically connected with the test controller and the to-be-tested medium-voltage protection card respectively, and generates and sends a test signal to the to-be-tested medium-voltage protection card according to a test instruction of the test controller; The signal collector is electrically connected with the to-be-tested medium-voltage protection card, and collects a feedback signal generated by the to-be-tested medium-voltage protection card according to the test signal; The signal collector is also connected with the test controller, and sends the feedback signal to the test controller; The terminal equipment is communicatively connected with the test controller, sends the test instruction to the test controller, and receives the feedback signal received by the test controller.

2. The device for detecting the aging degree and evaluating the service life of the medium voltage protection card according to claim 1, characterized in that, The test cabinet further includes a medium-voltage card adapter, one end of the medium-voltage card adapter is connected with the signal collector and the test signal source through a cable, and the other end is connected with the to-be-tested medium-voltage protection card through a card slot.

3. The device for detecting the aging degree and evaluating the service life of the medium voltage protection card according to claim 2, characterized in that, The test cabinet further includes a front-end machine, the front-end machine is connected with the signal collector and the test signal source through a wired mode, and is communicatively connected with the terminal equipment through a wired and / or wireless mode.

4. The device for detecting the aging degree and evaluating the service life of the medium voltage protection card according to claim 3, characterized in that, Terminals matching the cable terminals of the test signal source, the test controller, the signal collector, the medium-voltage card adapter and the front-end machine are arranged on the wiring board, wherein the terminal seat is detachably installed on the wiring board.

5. The device for detecting the aging degree and evaluating the life of the medium voltage protection card according to claim 3, characterized in that, A fixedly connected tray is arranged on the rack to place the test signal source, the test controller, the signal collector, the medium-voltage card adapter, the front-end machine and the wiring board, wherein a wiring groove is arranged between the tray and the inner wall of the test cabinet to guide and fix the cable.

6. The device for detecting the aging degree and evaluating the life of the medium voltage protection card according to claim 5, characterized in that, Protection pads are arranged on both sides of the bottom of the tray.

7. The device for detecting the aging degree and evaluating the life of a medium voltage protection card according to claim 1, characterized in that, The test controller includes a main control board and a switching value output board, wherein The main control board is communicatively connected with the terminal equipment; The main control board is also electrically connected with the signal collector to receive the feedback signal; The switching value output board is connected between the main control board and the test signal source to forward a control command sent by the main control board to the test signal source.

8. The device for detecting the aging degree and evaluating the life of a medium voltage protection card according to claim 1, characterized in that, The test signal source includes a relay protection tester for providing step-varying alternating or direct current voltage or alternating or direct current, and / or an adjustable power supply for providing adjustable direct current voltage or current.

9. The device for detecting the aging degree and evaluating the life of a medium voltage protection card according to claim 1, characterized in that, The signal collector includes a temperature sensor installed on the side or bottom of the test cabinet to collect temperature data of the to-be-tested medium-voltage protection card, and a current sensor electrically connected with the to-be-tested medium-voltage protection card to collect working current data of the to-be-tested medium-voltage protection card, and a voltage sensor to collect working voltage data of the to-be-tested medium-voltage protection card.

10. The device for detecting the aging degree and evaluating the life of a medium voltage protection card according to claim 2, characterized in that, The number of the card slots is one or more, and the card slots are detachably installed on the medium-voltage card adapter.

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