Nuclear power plant switch test device

Abstract

The utility model relates to a nuclear power plant switch test device, which comprises a box body, an operation panel is arranged in the box body, the nuclear power plant switch test device further comprises a main power supply switch, a power supply switch and a power supply switch, the high-voltage power supply unit is electrically connected with the output end of the main power switch and is used for selectively providing a working power supply for the tested switch equipment; the plurality of direct current control power supply units are electrically connected with the output end of the main power switch and are used for outputting different power voltages; the plurality of control units are arranged on the operation panel, are electrically connected with the plurality of direct current control power supply units in a one-to-one correspondence manner, and are used for being electrically connected with the tested switch equipment through a cable so as to control the switch-off or switch-on of the tested switch equipment; and the indication unit is arranged on the operation panel, is electrically connected with one direct-current control power supply unit, and is used for being electrically connected with the tested switch equipment through a cable so as to display the feedback state of the tested switch equipment. According to the utility model, the test efficiency of the switchgear can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear power plant maintenance technical field especially relates to nuclear power plant switch test device. BACKGROUND

[0002] In nuclear power plant, the unit needs to complete the electrical test work of the corresponding plant of the conventional island and nuclear island, which is dozens of low-voltage distribution systems, before the completion of the power supply, the diversity and complexity of the nuclear power electrical system determine the large number of switch devices (such as drawer switch) in the low-voltage distribution system, due to the variety of switch device models, manufacturers and design concepts, resulting in large amount of test work, and the current function test of switch device usually needs to perform a large number of wiring work, not only the test repetitive work is large, but also the test efficiency is low. UTILITY MODEL CONTENTS

[0003] The utility model solves the technical problem in, provide a kind of nuclear power plant switch test device.

[0004] The utility model solves the technical problem and adopts the technical scheme that a kind of nuclear power plant switch test device is structured, including box, operation panel is equipped in the box, the nuclear power plant switch test device further includes:

[0005] General power switch, it is arranged on the operation panel, and its input end is used to electrically connected alternating current power supply;

[0006] High-voltage power supply unit, the output end of the general power switch is electrically connected, for selectively providing working power supply to the switch device to be measured;

[0007] Multiple DC control power supply units, the output end of the general power switch is electrically connected, for outputting mutually different power supply voltage;

[0008] Multiple control units, it is arranged on the operation panel, and it is electrically connected with the multiple DC control power supply units one by one, for being electrically connected with the switch device to be measured by cable to control the switch device to be measured to open or close;And

[0009] Indication unit, it is arranged on the operation panel, and it is electrically connected with one of the DC control power supply units, for being electrically connected with the switch device to be measured by cable to display the feedback state of the switch device to be measured.

[0010] Preferably, each control unit includes N buttons and N+1 first interfaces, wherein each button includes a first contact loop, and N is a positive integer greater than 1.

[0011] The first contact circuit of the first button of each control unit is electrically connected between the first output terminal of the direct current control power supply unit corresponding to the control unit and the first interface, the first contact circuit of the second button of each control unit is electrically connected between the first output terminal of the direct current control power supply unit corresponding to the control unit and the second interface, the first contact circuit of the Nth button of each control unit is electrically connected between the first output terminal of the direct current control power supply unit corresponding to the control unit and the Nth interface, and the N+1th interface of each control unit is electrically connected to the second output terminal of the direct current control power supply unit corresponding to the control unit, and the first interface is used to be electrically connected to the measured switch device through a cable.

[0012] Preferably, the N buttons include at least one self-locking button and / or at least one inching button.

[0013] Preferably, each button further includes a second contact circuit linked with the first contact circuit, and each control unit further includes N first indicator lamps for indicating whether the buttons are closed.

[0014] The second contact circuit of the first button of each control unit and the first indicator lamp of each control unit are electrically connected in series between the first output terminal and the second output terminal of the direct current control power supply unit corresponding to the control unit, the second contact circuit of the second button of each control unit and the second indicator lamp of each control unit are electrically connected in series between the first output terminal and the second output terminal of the direct current control power supply unit corresponding to the control unit, and the second contact circuit of the Nth button of each control unit and the Nth indicator lamp of each control unit are electrically connected in series between the first output terminal and the second output terminal of the direct current control power supply unit corresponding to the control unit.

[0015] Preferably, the indication unit includes M second indicator lamps and M second interfaces, and M is a positive integer greater than 1.

[0016] The first end of each second indicator lamp is electrically connected to the first output terminal of the direct current control power supply unit electrically connected to the indication unit, and the second end of each second indicator lamp is electrically connected to the second interface in one-to-one correspondence, and the second interface is used to be electrically connected to the measured switch device through a cable.

[0017] Preferably, the high-voltage power supply unit includes a high-voltage alternating current power supply unit and a high-voltage direct current power supply unit.

[0018] The high-voltage alternating current power supply unit comprises a first switch, a third indicator lamp and two third interfaces; the input end of the first switch is electrically connected to the output end of the total power switch, the first output end is electrically connected to one of the third interfaces, and the second output end is electrically connected to the other third interface; the first output end of the first switch is also electrically connected to the second output end of the first switch through the third indicator lamp; and the third interface is used for being electrically connected to the switch device under test through a cable.

[0019] The high-voltage direct current power supply unit comprises a first direct current power supply, a second switch, a fourth indicator lamp and L fourth interfaces, wherein L is a positive integer greater than 2; the alternating current input end of the first direct current power supply is electrically connected to the output end of the total power switch, the first output end is electrically connected to the first end of the second switch, and the second output end is electrically connected to the first fourth interface; the second end of the second switch is electrically connected to the second to L fourth interfaces and is connected to the first fourth interface through the fourth indicator lamp; and the fourth interface is used for being electrically connected to the switch device under test through a cable.

[0020] Preferably, the box further comprises a box cover, and the box cover and the box form a flip type box, so that the control unit on the operation panel can be operated after the box cover is flipped open.

[0021] Preferably, the box comprises a first bottom surface, a first side surface, a second side surface and a third side surface opposite to the second side surface, a pull rod is arranged on the first bottom surface, a handle is arranged on each of the first side surface, the second side surface and the third side surface, and a plurality of universal wheels are arranged at the connection between the first bottom surface and the second side surface.

[0022] Preferably, each direct current control power supply unit comprises a second direct current power supply, a third switch and a fifth indicator lamp.

[0023] The input end of the second direct current power supply is electrically connected to the output end of the total power switch, the first output end of the second direct current power supply is electrically connected to the first end of the third switch, the second end of the third switch is electrically connected to the second output end of the second direct current power supply through the fifth indicator lamp, and the second end of the third switch and the second output end of the second direct current power supply are respectively electrically connected to the corresponding control unit as the first output end and the second output end of the direct current control power supply unit.

[0024] Preferably, the nuclear power plant switch test device further comprises:

[0025] a heat dissipation unit electrically connected to the output end of the total power switch and used for dissipating heat for the test device; and

[0026] A total power supply indicator lamp is electrically connected to an output end of the total power supply switch and used for lighting when the total power supply switch is closed.

[0027] The nuclear power plant switch testing device has the advantages that a test personnel can be detachably connected with a measured switch device through a cable, performs opening or closing actions on the measured switch device by operating a control unit, and determines whether the measured switch device normally functions by observing an indication unit, thereby improving the testing efficiency of the switch device. BRIEF DESCRIPTION OF DRAWINGS

[0028] The utility model will be described further below in combination with the drawings and embodiments, wherein:

[0029] Figure 1 is the structure schematic diagram of the box body in some embodiments of the utility model in the first visual angle;

[0030] Figure 2 is the structure schematic diagram of the box body and the box cover in some embodiments of the utility model;

[0031] Figure 3 is the structure schematic diagram of the box body in some embodiments of the utility model in the second visual angle;

[0032] Figure 4 is the circuit principle diagram of the nuclear power plant switch testing device in some embodiments of the utility model;

[0033] Figure 5 is the structure schematic diagram of the operation panel in some embodiments of the utility model. DETAILED DESCRIPTION

[0034] In order to have a clearer understanding of the technical features, objects and effects of the utility model, the specific embodiments of the utility model will be described in detail with reference to the drawings.

[0035] In the following description, it should be understood that the directions or position relations indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" are based on the directions or position relations shown in the drawings, constructed and operated in a particular direction, and are only for the convenience of describing the technical scheme, and should not be understood as indicating that the devices or elements must have a particular direction, therefore, it should not be understood as a limitation on the utility model.

[0036] The utility model provides a kind of nuclear power plant switch testing device. Figure 1 And Figure 4As shown, the nuclear power plant switch test device comprises a box body 1, and an operation panel 11 is arranged in the box body 1.

[0037] In some embodiments, as shown in Figure 2 , a box cover 12 is further arranged on the box body 1, and the box cover 12 and the box body 1 form a flip type box body. After the box cover 12 is flipped open, a test personnel can operate the control unit 5 on the operation panel 11.

[0038] In order to improve the portability of the nuclear power plant switch test device and facilitate the test personnel to take the device to the scene to perform test work, in some embodiments, as shown in Figure 2 and Figure 3 , the box body 1 comprises a bottom surface 13, a first side surface 14, a second side surface 15, and a third side surface 16 opposite to the second side surface 15. The bottom surface 13 is provided with a pull rod 17, the first side surface 14, the second side surface 15, and the third side surface 16 are respectively provided with a handle 18, and the connection part of the bottom surface 13 and the second side surface 15 is further provided with a plurality of universal wheels 19. The number of the universal wheels 19 can be 2, and the setting position can refer to Figure 2 , which is not limited here, and please refer to Figure 2 and Figure 3 . The pull rod 17 can be pulled out from the bottom surface 13, and the test personnel can drag the box body 1 by using the pull rod 17 in order to achieve the transportation purpose. In addition, the handle 18 can facilitate the test personnel to lift the entire box body 1 in order to achieve the purpose of passing through the stairs and placing in a high place, etc.

[0039] As shown in Figure 4 , the nuclear power plant switch test device further comprises a total power switch 2, a high-voltage power supply unit 3, an indication unit 6, a plurality of direct-current control power supply units 4, and a plurality of control units 5.

[0040] Please refer to Figure 4 and Figure 5 , the total power switch 2 is arranged on the operation panel 11 so as to be operated by the test personnel (including opening and closing the total power switch 2), and the input end of the total power switch 2 is used for electrically connecting an alternating current power supply. The total power switch 2 is a current ship type switch. As for the alternating current power supply, it includes but is not limited to a commercial power supply, a generator, an inverter, and other forms of alternating current power supply.

[0041] Please refer to Figure 4 , the high-voltage power supply unit 3 is electrically connected to the output end of the total power switch 2, and the high-voltage power supply unit 3 is used for selectively providing working power for the measured switch equipment. It should be noted that in the nuclear power plant, some measured switch equipment (such as some low-voltage drawers on the switchboard) belongs to redundant or emergency equipment, and the unit will only supply power to it under special working conditions. Therefore, when testing these switch equipment, it is also necessary to provide working power for it, so as to normally carry out the test work.

[0042] In some embodiments, as shown in Figure 4 , the high-voltage power supply unit 3 can include a high-voltage AC power supply unit for providing high-voltage AC power (e.g., 220V AC power) to the switchgear under test and a high-voltage DC power supply unit for providing high-voltage DC power (e.g., 220V DC power) to the switchgear under test.

[0043] Specifically, referring to Figure 4 , the high-voltage AC power supply unit can include a first switch 311, a third indicator light 312, and two third interfaces 313. The input end of the first switch 311 is electrically connected to the output end of the main power switch 2, the first output end of the first switch 311 is electrically connected to one of the third interfaces 313, the second output end of the first switch 311 is electrically connected to the other third interface 313, and the first output end of the first switch 311 is also electrically connected to the second output end of the first switch 311 through the third indicator light 312. The third interface 313 is used to be electrically connected to the power supply end of the switchgear under test through a cable. It can be understood that the first switch 311 can be an existing circuit breaker.

[0044] Referring to Figure 5 , the first switch 311 and the third indicator light 312 can be arranged on the operation panel 11. It can be understood that, as shown in Figure 4 , when the first switch 311 is closed, the third indicator light 312 will be lit, so that the tester can determine whether the first switch 311 has been closed by observing the on-off of the third indicator light 312.

[0045] In some embodiments, as shown in Figure 4 , the high-voltage DC power supply unit can include a first DC power supply 321, a second switch 322, a fourth indicator light 323, and L fourth interfaces 324, where L is a positive integer greater than 2. The AC input end of the first DC power supply 321 is electrically connected to the output end of the main power switch 2, the first output end of the first DC power supply 321 is electrically connected to the first end of the second switch 322, the second output end of the first DC power supply 321 is electrically connected to the first fourth interface 324, the second end of the second switch 322 is electrically connected to the second to L fourth interfaces 324 and is connected to the first fourth interface 324 through the fourth indicator light 323, and the fourth interface 324 is used to be electrically connected to the switchgear under test through a cable. It can be understood that L can be equal to 6, the first DC power supply 321 can be an existing 220V DC power supply module, and the second switch 322 can be an existing self-locking switch.

[0046] Referring to Figure 5 , the second switch 322 and the fourth indicator light 323 can be arranged on the operation panel 11. It can be understood that, as shown in Figure 4As shown, when the second switch 322 is closed, the fourth indicator lamp 323 will be lighted up, so that the test personnel can determine whether the first DC power supply 321 normally outputs voltage by observing the light and dark of the fourth indicator lamp 323.

[0047] Please refer to Figure 4 Each DC control power supply unit 4 is electrically connected to the output end of the general power switch 2, and each DC control power supply unit 4 is used to output DC voltage with different voltage values. It should be noted that, since there are various switch devices in the nuclear power plant, the voltage values of the switching commands of different switch devices are different, including but not limited to 24V, 48V and 110V DC voltage, in order to adapt to different tests, it is necessary to configure multiple DC control power supply units 4 with different output voltage values.

[0048] In some embodiments, as shown in Figure 4 Each DC control power supply unit 4 includes a second DC power supply 41, a third switch 42 and a fifth indicator lamp 43. The input end of the second DC power supply 41 is electrically connected to the output end of the general power switch 2, and the first output end of the second DC power supply 41 is electrically connected to the first end of the third switch 42. The second end of the third switch 42 is electrically connected to the second output end of the second DC power supply 41 through the fifth indicator lamp 43, and the second end of the third switch 42 and the second output end of the second DC power supply 41 are respectively electrically connected to the first output end and the second output end of the corresponding control unit 5. Among them, the third switch 42 can be an existing self-locking switch, and the second DC power supply 41 can be an existing 24V DC power supply module, 48V DC power supply module or 110V DC power supply module.

[0049] Further, the first DC power supply 321 and the second DC power supply 41 prefer to use power supply modules with overcurrent overload and short circuit protection functions, which not only can prolong the service life of the equipment, but also can ensure the safety of the test personnel.

[0050] Please refer to Figure 5 The third switch 42 and the fifth indicator lamp 43 can be arranged on the operation panel 11, and it can be understood that, as shown in Figure 4 When the third switch 42 is closed, the fifth indicator lamp 43 will be lighted up, so that the test personnel can determine whether the second DC power supply 41 normally outputs voltage by observing the light and dark of the fifth indicator lamp 43.

[0051] In one specific embodiment, the plurality of DC control power supply units 4 includes one 24V DC power supply, one 48V DC power supply and one 110V DC power supply.

[0052] Please refer to Figure 4 and Figure 5Each control unit 5 is arranged on the operation panel 11, and each control unit 5 is electrically connected to the plurality of DC control power supply units 4 one by one. Each control unit 5 is used to electrically connect to the measured switch device through a cable to control the measured switch device to open or close. Specifically, the tester can electrically connect the control unit 5 to the command input end of the measured switch device through the cable in a detachable manner, and then control the measured switch device to open or close by operating the control unit 5. In this way, the tester can observe the display state of the indication unit 6 or whether the measured switch device correctly performs the opening or closing action as the operation, and if so, it can be determined that the opening and closing function of the measured switch device is normal, and if not, it can be determined that the opening and closing function of the measured switch device is faulty.

[0053] In some embodiments, as shown in Figure 4 Each control unit 5 includes N buttons 51 and N+1 first interfaces 52, where each button 51 includes a first contact loop, and N is a positive integer greater than 1. The first contact loop of the first button 51 of each control unit 5 is electrically connected between the first output end of the DC control power supply unit 4 corresponding to the control unit 5 and the first interface 52, the first contact loop of the second button 51 is electrically connected between the first output end of the DC control power supply unit 4 corresponding to the control unit 5 and the second interface 52, and the first contact loop of the Nth button 51 is electrically connected between the first output end of the DC control power supply unit 4 corresponding to the control unit 5 and the Nth interface 52. The N+1th interface 52 of each control unit 5 is electrically connected to the second output end of the DC control power supply unit 4 corresponding to the control unit 5, and the first interface 52 is used to be electrically connected to the measured switch device through a cable. Wherein, N can be equal to 6 or 8, and specifically can refer to Figure 4 .

[0054] Please refer to Figure 5 Each button 51 and each first interface 52 can be arranged on the operation panel 11, so that the tester can conveniently operate the buttons and perform cable connection.

[0055] It should be noted that in a nuclear power plant, the switch device is usually controlled by a distribution board or the like. When a suitable DC voltage is input to the command input end of the switch device, the corresponding action of the switch device can be controlled, for example, when a DC voltage with a suitable voltage value is input to the closing command input end of the switch device, the switch device can be controlled to close, and when a DC voltage with a suitable voltage value is input to the opening command input end of the switch device, the switch device can be controlled to open. As Figure 4As shown, the N+1th first interface 52 is used to electrically connect the common ground of the switchgear under test, and the 1st to Nth first interfaces 52 are used to electrically connect the command input terminals of the switchgear under test. When the button 51 is pressed, it is equivalent to inputting a DC voltage with a proper voltage value to the command input terminals of the switchgear under test, so that the switchgear under test can be controlled to perform corresponding switching actions.

[0056] In order to determine whether the test personnel have pressed and closed the button 51, in some embodiments, as shown in Figure 4 each button 51 further includes a second contact circuit which is linked with the first contact circuit (i.e. when the button 51 is pressed, the first and second contact circuits thereof are closed at the same time), and each control unit 5 further includes N first indicator lights 53 for indicating whether the button 51 is closed. The 1st button 51 second contact circuit and the 1st first indicator light 53 of each control unit 5 are connected in series between the first output terminal and the second output terminal of the DC control power supply unit 4 corresponding to the control unit 5, the 2nd button 51 second contact circuit and the 2nd first indicator light 53 are connected in series between the first output terminal and the second output terminal of the DC control power supply unit 4 corresponding to the control unit 5, and so on.

[0057] Please refer to Figure 5 , the first indicator light 53 can be arranged on the operation panel 11. As can be understood, as shown in Figure 4 when the button 51 is pressed, the first indicator light 53 will be lit, so that the test personnel can determine whether the button 51 has been closed by observing the light and dark of the first indicator light 53.

[0058] Since some switch devices in nuclear power plants are configured with input instruction blocking circuit, for example, assuming that the tester inputs the tripping instruction to the tripping instruction input end of the switch device through the button 51 for a certain time, at this time, whether the tester releases the button 51 or not, the voltage of the tripping instruction input end of the switch device will be blocked to a certain voltage value (equivalent to blocking the closing instruction) under the action of the blocking circuit until the entire tripping operation of the switch device is completed. For some switch devices without input instruction blocking circuit, the tester will immediately stop the tripping and closing operation as soon as the button 51 is released. In order to simplify the operation of the tester, at least one existing self-locking button and / or at least one existing jog button are included in the N buttons 51 in some embodiments. It can be understood that the tester can select the first interface 52 to be connected according to the actual situation of the switch device to be tested, for example, when testing the switch device without blocking circuit, the first interface 52 electrically connected with the self-locking button can be connected, and when testing the switch device with blocking circuit, the first interface 52 electrically connected with the jog button can be connected.

[0059] Please refer to Figure 5 and Figure 4 , the indication unit 6 is arranged on the operation panel 11, the indication unit 6 is electrically connected with one of the DC control power supply units 4, and the indication unit 6 is used to electrically connect the switch device to be tested through the cable to display the feedback state of the switch device to be tested.

[0060] In some embodiments, as shown in Figure 4 , the indication unit 6 includes M second indication lamps 61 and M second interfaces 62, and M is a positive integer greater than 1. The first end of each second indication lamp 61 is electrically connected with the first output end of the DC control power supply unit 4 electrically connected with the indication unit 6, and the second end is electrically connected with each second interface 62 in one-to-one manner. The second interface 62 is used to electrically connect to the state feedback signal end of the switch device to be tested through the cable.

[0061] Please refer to Figure 5 , each second indication lamp 61 and each second interface 62 can be arranged on the operation panel 11. It can be understood that, as shown in Figure 4 , when a certain second interface 62 electrically connected with the second interface 62 sends a state feedback signal (including but not limited to short circuit fault, overload fault, insulation fault, closing, tripping, etc.) to it, the second indication lamp 61 electrically connected with the second interface 62 will be lit. Of course, the tester can determine the actual working condition of the switch device to be tested from the type of the state feedback signal end actually electrically connected with the second interface 62, for example, the second interface 62 is electrically connected with the closing feedback signal end, and when the second indication lamp 61 electrically connected with the second interface 62 is lit, the tester can determine that the switch device to be tested is performing the closing operation.

[0062] In some embodiments, as shown in Figure 4 Figure 5 Figure 4 Figure 5 Figure 4 Figure 4 The nuclear power plant switch test device can further include a heat dissipation unit 7, a total power supply indicator lamp 8 and a fourth switch S1. The heat dissipation unit 7 is electrically connected to the output end of the total power supply switch 2, and is used for dissipating heat for the test device. The total power supply indicator lamp 8 is electrically connected to the output end of the total power supply switch 2, and is used for lighting when the total power supply switch 2 is closed. The fourth switch S1 is provided on the operation panel 11, and is connected in series between the total power supply switch 2 and the high-voltage power supply unit 3 and each DC control power supply unit, and is used as a redundant switch of the total power supply switch 2, and can be an existing circuit breaker.

[0063] In some embodiments, the first interface 52, the second interface 62, the third interface 313 and the fourth interface 324 are preferably existing 4mm banana sockets, and correspondingly, the cable used in the utility model is configured as a cable provided with a spring-type banana plug at one end and a plug of a specific model determined according to the socket of the measured switch device at the other end, so as to improve the simplicity and convenience of plugging and unplugging of the cable.

[0064] It can be understood that the utility model can be detachably connected with the measured switch device through the cable, and has the advantages of simple and convenient connection operation; the test personnel can control the measured switch device to perform the opening or closing action through the operation control unit, so that the operation is simple; the test personnel can also determine whether the measured switch device performs the corresponding action as the operation through the observation of the indication unit, and then determine whether the function of the measured switch device is normal, so that the method is simple and efficient. Furthermore, the utility model has the advantages of simple circuit structure.

[0065] It can be understood that the above embodiments only express the preferred embodiments of the utility model, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the utility model patent; it should be pointed out that for ordinary skilled persons in the art, the above technical features can be freely combined without departing from the concept of the utility model, and some modifications and improvements can be made, which all belong to the protection scope of the utility model; therefore, any equivalent transformation and modification within the scope of the claims of the utility model should belong to the scope of the claims of the utility model.

Claims

1. A nuclear power plant switch test device, characterized by, The nuclear power plant switch test device comprises a cabinet (1) provided with an operation panel (11), and further comprises: a general power switch (2) provided on the operation panel (11) and having an input end electrically connected to an AC power supply; a high-voltage power supply unit (3) electrically connected to an output end of the general power switch (2) and used for selectively providing operating power to a switch device under test; a plurality of DC control power supply units (4) electrically connected to the output end of the general power switch (2) and used for outputting DC voltages with different values; a plurality of control units (5) provided on the operation panel (11) and electrically connected to the DC control power supply units (4) one by one, used for electrically connecting to the switch device under test through a cable to control the switch device under test to open or close; and an indication unit (6) provided on the operation panel (11) and electrically connected to one of the DC control power supply units (4), used for electrically connecting to the switch device under test through a cable to display a feedback state of the switch device under test.

2. The nuclear power plant switch test device of claim 1, wherein, Each control unit (5) comprises N buttons (51) and N+1 first interfaces (52), wherein each button (51) comprises a first contact loop, and N is a positive integer greater than 1. The first contact loop of the first button (51) of each control unit (5) is electrically connected between a first output end of the DC control power supply unit (4) corresponding to the control unit (5) and the first interface (52), the first contact loop of the second button (51) is electrically connected between the first output end of the DC control power supply unit (4) corresponding to the control unit (5) and the second interface (52), and the first contact loop of the Nth button (51) is electrically connected between the first output end of the DC control power supply unit (4) corresponding to the control unit (5) and the Nth interface (52). The N+1th interface (52) of each control unit (5) is electrically connected to a second output end of the DC control power supply unit (4) corresponding to the control unit (5), and the first interface (52) is used for electrically connecting to the switch device under test through a cable.

3. The nuclear power plant switch test device of claim 2, wherein, The N buttons (51) comprise at least one self-locking button and / or at least one jog button.

4. The nuclear power plant switch test apparatus according to claim 2, characterized by Each button (51) further comprises a second contact loop linked with the first contact loop, and each control unit (5) further comprises N first indication lamps (53) used for indicating whether the button (51) is closed. Each of the control units (5) comprises a first button (51) second contact circuit and a first indicator lamp (53) connected in series and then electrically connected between the first output end and the second output end of the direct current control power supply unit (4) corresponding to the control unit (5), a second button (51) second contact circuit and a second indicator lamp (53) connected in series and then electrically connected between the first output end and the second output end of the direct current control power supply unit (4) corresponding to the control unit (5), and so on.

5. The nuclear power plant switch test apparatus of claim 1, wherein The indication unit (6) comprises M second indicator lamps (61) and M second interfaces (62), M being a positive integer greater than 1. The first end of each of the second indicator lamps (61) is electrically connected to the first output end of the direct current control power supply unit (4) electrically connected to the indication unit (6), and the second end is one-to-one electrically connected to each of the second interfaces (62), which are used to be electrically connected to the measured switch device through a cable.

6. The nuclear power plant switch test apparatus of claim 1, wherein The high-voltage power supply unit (3) comprises a high-voltage alternating current power supply unit and a high-voltage direct current power supply unit. The high-voltage alternating current power supply unit comprises a first switch (311), a third indicator lamp (312), and two third interfaces (313); the input end of the first switch (311) is electrically connected to the output end of the total power switch (2), the first output end is electrically connected to one of the third interfaces (313), and the second output end is electrically connected to the other third interface (313); the first output end of the first switch (311) is also electrically connected to the second output end of the first switch (311) through the third indicator lamp (312); and the third interface (313) is used to be electrically connected to the measured switch device through a cable. The high-voltage direct current power supply unit comprises a first direct current power supply (321), a second switch (322), a fourth indicator lamp (323), and L fourth interfaces (324), wherein L is a positive integer greater than 2; the alternating current input end of the first direct current power supply (321) is electrically connected to the output end of the total power switch (2), the first output end is electrically connected to the first end of the second switch (322), and the second output end is electrically connected to the first fourth interface (324); the second end of the second switch (322) is electrically connected to the second to L fourth interfaces (324) and connected to the first fourth interface (324) through the fourth indicator lamp (323); and the fourth interface (324) is used to be electrically connected to the measured switch device through a cable.

7. The nuclear power plant switch test apparatus of claim 1, wherein The box body (1) is further provided with a box cover (12), and the box cover (12) and the box body (1) form a flip type box body, so that the control unit (5) on the operation panel (11) can be operated after the box cover (12) is flipped open.

8. The nuclear power plant switch test apparatus of claim 7, wherein, The box (1) comprises a bottom surface (13), a first side surface (14), a second side surface (15) and a third side surface (16) opposite to the second side surface (15), a pull rod (17) is arranged on the bottom surface (13), the first side surface (14), the second side surface (15) and the third side surface (16) are respectively provided with a handle (18), and a plurality of universal wheels (19) are further arranged at the connection between the bottom surface (13) and the second side surface (15).

9. The nuclear power plant switch test apparatus of claim 1, wherein, Each of the direct current control power supply units (4) comprises a second direct current power supply (41), a third switch (42) and a fifth indicating lamp (43); The input end of the second direct current power supply (41) is electrically connected to the output end of the total power switch (2), the first output end of the second direct current power supply (41) is electrically connected to the first end of the third switch (42), the second end of the third switch (42) is electrically connected to the second output end of the second direct current power supply (41) through the fifth indicating lamp (43), and the second end of the third switch (42) and the second output end of the second direct current power supply (41) are respectively electrically connected to the corresponding control unit (5) as the first output end and the second output end of the direct current control power supply unit (4).

10. The nuclear power plant switch test device according to any one of claims 1 to 9, characterized in that Further comprising: a heat dissipation unit (7) electrically connected to the output end of the total power switch (2) and used for dissipating heat for the test device; and a total power indicating lamp (8) electrically connected to the output end of the total power switch (2) and used for lighting when the total power switch (2) is closed.

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