A multifunctional 10kv equipment electric test platform for preventive test

Abstract

The present application relates to the technical field of power equipment, specifically to a multifunctional 10KV equipment electric test platform for preventive test, which comprises symmetrically arranged first and second sealing assemblies, a base is arranged at the bottom of a circuit breaker, and a support sleeve is arranged on the base; an arc extinguishing chamber sleeve is arranged above the support sleeve, and a communication assembly is arranged in the arc extinguishing chamber sleeve; the arc extinguishing chamber sleeve is filled with gas to suppress the electric arc generated when the communication assembly is disconnected; detection assemblies are further arranged on the first and second sealing assemblies; when the first and second sealing assemblies are closed with the circuit breaker, the gas leaked from the arc extinguishing chamber sleeve is detected by the detection assemblies.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power equipment, in particular to a multifunctional 10KV equipment electric test platform for preventive test. BACKGROUND

[0002] The circuit breaker in 10kV equipment is the core protection device of the power system, playing the role of "automatic switch". Its main function is to reliably close and break the load current during normal system operation, and to realize the switching of operation mode. More importantly, when a short circuit, overload or other fault occurs in the line or power equipment, it can quickly and accurately automatically trip and cut off the fault current of tens of thousands of amperes, completely isolating the fault part from the power grid and preventing the expansion of the fault.

[0003] SF6 gas is the core insulation and arc extinguishing medium of the circuit breaker. Its core role mainly reflects in two aspects: first, excellent insulation performance. Under the same pressure, its insulation strength is much higher than that of air, which can effectively isolate the high-voltage live parts from the grounded shell, ensuring the compactness and safe operation of the equipment. Second, strong arc extinguishing ability. SF6 gas decomposes and absorbs a large amount of energy under high temperature of electric arc, and can quickly recombine after cooling. Its excellent heat conductivity and negative electrical property can quickly absorb free electrons and extinguish electric arc, thereby efficiently and quickly cutting off the fault current far exceeding the rated current at the current zero point. The air tightness of the circuit breaker in 10kV equipment is crucial, directly related to the safety of the equipment and the stability of the power grid. If the SF6 gas as arc extinguishing and insulation medium leaks, it will cause the pressure in the arc chamber to drop, seriously weakening its arc extinguishing ability and insulation strength. This not only may cause opening failure and serious damage to the equipment, but also may lead to insulation breakdown during operation, causing major power outage accidents such as bus short circuit. At the same time, it can also reduce gas replenishment and maintenance cost, ensuring long-term reliable operation of the circuit breaker. Therefore, it is necessary to conduct preventive test on 10kv circuit breaker. SUMMARY

[0004] To achieve the above purpose, the present application provides the following technical scheme:

[0005] The utility model provides a multifunctional 10KV equipment electric test platform of preventive test, including symmetrically arranged first sealing assembly and second sealing assembly, the circuit breaker to be detected is arranged on the operation table, and the first sealing assembly and the second sealing assembly on both sides of the circuit breaker are connected with the operation table through the guide rail, the bottom of the circuit breaker is provided with the base, the base is provided with the support sleeve, the arc chamber sleeve is arranged above the support sleeve, the arc chamber sleeve is provided with the communication assembly, the arc chamber sleeve is filled with gas to suppress the arc generated when the communication assembly is disconnected, the first sealing assembly and the second sealing assembly are also provided with detection assembly, when the first sealing assembly and the second sealing assembly are closed with the circuit breaker, the gas leaked from the arc chamber sleeve is detected through the detection assembly.

[0006] Further, the communication assembly includes a first open state and a second open state; when the closed communication assembly is disconnected, the communication assembly passes through the first open state and the second open state in turn.

[0007] Further, the communication assembly includes a conductive moving end and a conductive fixed end; the conductive moving end is slidably arranged on a sealing seat, the sealing seat connects the support sleeve and the arc chamber sleeve; the sealing seat is also provided with a gas supplement pipe; the conductive moving end is in communication with the lower wiring end through the sealing seat; the conductive fixed end is in communication with the upper wiring end through an upper insulator; the upper insulator is arranged at the upper end of the arc chamber sleeve.

[0008] Further, the conductive moving end includes a movable conductive column and a conductive piston arranged at the upper end of the movable conductive column; the piston is provided with an outer conducting part and an inner conducting part arranged inside the outer conducting part; a conductive brush and a sealing ring are arranged between the movable conductive column and the sealing seat; the conductive fixed end includes a conductive ring and a static conductive column arranged inside the conductive ring.

[0009] Further, the distance difference between the lower end of the static conductive column of the conductive fixed end and the lower end of the conductive ring is D; the distance difference between the upper end of the inner conducting part of the conductive moving end and the upper end of the outer conducting part is H; the D is greater than the H, so that in the first open state of the communication assembly, the conductive ring is out of contact with the outer conducting part, and the static conductive column remains in contact with the inner conducting part; in the second open state of the communication assembly, the conductive ring and the outer conducting part, the static conductive column and the inner conducting part are all out of contact.

[0010] Further, the upper end of the outer conducting part is provided with an insulating sleeve; the insulating sleeve guides the joint of the static conducting column and the inner conducting part; the piston is provided with a first through hole, which communicates the cavity of the lower part of the piston and the cavity inside the outer conducting part; the upper end of the outer conducting part is provided with a second through hole, and the outer side of the upper part of the outer conducting part is provided with a side through hole.

[0011] Further, the first sealing assembly and the second sealing assembly are structurally identical and symmetrically arranged, and comprise a sliding seat and a support arranged on the sliding seat; the support is provided with oppositely arranged housings; the upper recess of the upper part of the housing corresponds to the upper insulator, the lower recess of the lower part of the housing corresponds to the lower insulator, and the wire groove of the middle part of the housing corresponds to the lower wiring end; the housings of the first sealing assembly and the second sealing assembly are provided with detection assemblies capable of abutting each other.

[0012] Further, the detection assembly comprises a base fixed in a mounting groove of the housing; the base is provided with a movable moving body; the moving body is provided with a sensor for detecting gas; the lower end of the base is provided with a air supply assembly; the end of the base close to the sensor is provided with a first valve assembly.

[0013] Further, the first valve assembly comprises a fixed ring in contact with the abutting part of the moving body; the fixed ring is connected with a sealing disc through a supporting rod; the supporting rod is sleeved with a spring, and the two ends of the spring abut against the fixed ring and the base, respectively; the sealing disc can close the first air hole on the base; the moving body is provided with a second air hole and a third air hole.

[0014] Further, the air supply assembly comprises a second valve assembly movably arranged in a base body; the top end of the second valve assembly is provided with a ball; the ball abuts against the inclined surface of the lower end of the moving body; the lower end of the base body is provided with a fan.

[0015] Advantageous effects

[0016] Compared with the prior art, the present application forms a closed cavity around the circuit breaker through two sealing assemblies, and the air tightness of the circuit breaker is subjected to preventive test through the detection assembly; the detection assembly is in a closed state when the sealing member is opened, so that the sensor in the detection assembly is prevented from being affected by external air; the communication assembly of the circuit breaker has a first and a second disconnecting state, so that the sudden interruption of current in the communication assembly is slowed down, and the arc that may be generated when the communication assembly is disconnected is suppressed. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the multifunctional preventive test 10KV equipment electric test table of the present application;

[0018] Figure 2The schematic diagram of the open state of the 10KV equipment electric test platform of the present application;

[0019] Figure 3 The structural schematic diagram of the sealing assembly of the present application;

[0020] Figure 4 The structural schematic diagram of the communication assembly of the present application;

[0021] Figure 5 The structural schematic diagram of the inside of the communication assembly of the present application;

[0022] Fig. 6(A) is the schematic diagram of the completely communicated state of the communication assembly of the present application, Fig. 6(B) is the state of the disconnection of the conductive ring and the outer conductive part, Fig. 6(C) is the state of the disconnection of the inner conductive end and the static conductive column, and Fig. 6(D) is the completely separated state;

[0023] Figure 7 The schematic diagram of the detection assembly of the present application;

[0024] Figure 8 The schematic diagram of the pushing of the detection assembly when the sealing assembly of the present application is closed;

[0025] Figure 9 The structural schematic diagram of the closed state of the detection assembly of the present application;

[0026] Figure 10 The structural schematic diagram of the open state of the detection assembly of the present application;

[0027] Figure 11 The internal structural schematic diagram of the detection assembly of the present application;

[0028] In the figure:

[0029] The first sealing assembly 1, the second sealing assembly 10, the sliding seat 11, the support 12, the shell 13, the upper groove 131, the lower groove 132, the sealing ring 133, the wire groove 134;

[0030] The circuit breaker 3, the base 31, the support sleeve 32, the arc extinguishing chamber sleeve 33, the lower wiring end 34, the upper wiring end 35, the lower insulator 36, the upper insulator 37;

[0031] The detection assembly 5, the base 51, the first air hole 511, the moving body 52, the inclined surface 521, the second air hole 522, the third air hole 523, the abutting part 524, the first valve assembly 53, the fixed ring 531, the spring 532, the sealing disc 533, the air supply assembly 54, the fan 541, the second valve assembly 542, the ball 543, the base body 540, the valve hole 545, the sensor 55;

[0032] The communication assembly 6, the conductive moving end 61, the dynamic conductive column 611, the inner conductive part 612, the outer conductive part 613, the insulating sleeve 614, the piston 615, the conductive fixed end 62, the static conductive column 621, the conductive ring 622, the sealing seat 63, the air supplement pipe 64, the first through hole 65, the side through hole 66, and the second through hole 67. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application. Figure 1 - The drawings Figure 11 The multifunctional preventive test 10KV equipment electrical test platform of the present application is described in detail. The multifunctional preventive test 10KV equipment electrical test platform comprises symmetrically arranged first sealing assembly 1 and second sealing assembly 10. A circuit breaker 3 to be detected is arranged on an operation table. The first sealing assembly 1 and the second sealing assembly 10 on both sides of the circuit breaker 3 are connected with the operation table through guide rails. A base 31 is arranged at the bottom of the circuit breaker 3. A support sleeve 32 is arranged on the base 31. An arc-extinguishing chamber sleeve 33 is arranged above the support sleeve 32. A communication assembly 6 is arranged in the arc-extinguishing chamber sleeve 33. The arc-extinguishing chamber sleeve 33 is filled with gas to suppress the electric arc generated when the communication assembly 6 is disconnected. Detection assemblies 5 are further arranged on the first sealing assembly 1 and the second sealing assembly 10. When the first sealing assembly 1 and the second sealing assembly 10 are closed with the circuit breaker 3, the gas leaked from the arc-extinguishing chamber sleeve 33 is detected through the detection assemblies 5.

[0035] Specifically, the gas filled in the arc-extinguishing chamber sleeve 33 is SF6 gas. The SF6 gas is used to suppress the electric arc possibly generated when the communication assembly 6 is disconnected. The SF6 gas is mainly used as arc-extinguishing medium and insulation medium in the circuit breaker. A gas supplement device needs to be arranged on the circuit breaker to ensure the gas concentration in the arc-extinguishing chamber. When the gas tightness of the arc-extinguishing chamber is reduced due to long time, excessive SF6 gas leakage is easily caused, and the maintenance frequency of the SF6 gas supplement device is increased. Therefore, the gas tightness of the 10KV circuit breaker 3 needs to be detected through the preventive test equipment.

[0036] The communication assembly 6 comprises a first disconnected state and a second disconnected state. When the closed communication assembly 6 is disconnected, the communication assembly 6 sequentially passes through the first disconnected state and the second disconnected state.

[0037] Specifically, the conductive moving end 61 and the conductive fixed end 62 of the communication assembly 6 have two groups of joint assemblies with different lengths, and the communication assembly 6 sequentially passes through a first disconnection state and a second disconnection state and completes complete disconnection when disconnected, which can reduce the arc intensity generated during disconnection. In the first disconnection state, a group of joint assemblies with a shorter overlap length are disconnected, and a group of joint assemblies with a longer overlap length are in a communication state.

[0038] The communication assembly 6 includes a conductive moving end 61 and a conductive fixed end 62; the conductive moving end 61 is slidably arranged on a sealing seat 63, and the sealing seat 63 is connected to a support sleeve 32 and an arc-extinguishing chamber sleeve 33; the sealing seat 63 is further provided with a gas supplement pipe 64; the conductive moving end 61 is in communication with a lower wiring end 34 through the sealing seat 63; the conductive fixed end 62 is in communication with an upper wiring end 35 through an upper insulator 37; and the upper insulator 37 is arranged at an upper end of the arc-extinguishing chamber sleeve 33.

[0039] Specifically, the gas supplement pipe 64 supplements SF6 gas into the arc-extinguishing chamber sleeve 33, and the SF6 gas suppresses the generation of arc in the communication assembly 6 when the circuit breaker is disconnected.

[0040] The conductive moving end 61 includes a movable conductive column 611 and a conductive piston 615 arranged at an upper end of the movable conductive column 611; the conductive piston 615 is provided with an outer conducting part 613 and an inner conducting part 612 arranged inside the outer conducting part 613; a conductive brush and a sealing ring are arranged between the movable conductive column 611 and the sealing seat 63; and the conductive fixed end 62 includes a conductive ring 622 and a static conductive column 621 arranged inside the conductive ring 622.

[0041] Specifically, the conductive ring 622 has a resilient structure, which improves the abutting force when the conductive ring 622 contacts the outer conducting part 613, and the outer conducting part 613 and the inner conducting part 612 are in conductive communication with the movable conductive column 611 through the conductive piston 615.

[0042] The distance difference between the lower end of the static conductive column 621 of the conductive fixed end 62 and the lower end of the conductive ring 622 is D, the distance difference between the upper end of the inner conducting part 612 of the conductive moving end 61 and the upper end of the outer conducting part 613 is H, and the D is greater than the H, so that in the first disconnection state of the communication assembly 6, the conductive ring 622 is out of contact with the outer conducting part 613, and the static conductive column 621 remains in contact with the inner conducting part 612; in the second disconnection state of the communication assembly 6, the conductive ring 622 and the outer conducting part 613, and the static conductive column 621 and the inner conducting part 612 are all out of contact.

[0043] The communication assembly 6 realizes complete disconnection through the first disconnection state and the second disconnection state, so that part of the current in the communication assembly 6 is cut off in the first disconnection state, and complete termination of the current in the communication assembly 6 is realized in the second disconnection state, and the possibility of dielectric breakdown caused by sudden termination of the current in the communication assembly 6 can be reduced through the above two steps of disconnection.

[0044] The upper end of the outer conducting part 613 is provided with an insulating sleeve 614; the insulating sleeve 614 guides the joint of the static conducting column 621 and the inner conducting part 612; the piston 615 is provided with a first through hole 65, which communicates the cavity in the lower part of the piston 615 and the cavity inside the outer conducting part 613; the upper end of the outer conducting part 613 is provided with a second through hole 67, and the outer side surface of the upper part of the outer conducting part 613 is provided with a side through hole 66.

[0045] Specifically, the insulating sleeve 614 is annular and is arranged at the upper end of the outer conducting part 613 of the cylindrical structure; when the conductive moving end 61 is jointed with the conductive fixed end 62, the static conducting column 621 of the conductive fixed end 62 is inserted into the insulating sleeve 614 and enters the inside of the outer conducting part 613; in this process, the insulating sleeve 614 corrects the position of the static conducting column 621 and guides the static conducting column 621 to be inserted into the inner conducting part 612 and realize electrical conduction. The internal cavity of the arc extinguishing chamber sleeve 33 is filled with high-pressure SF6 gas; when the communication assembly 6 is disconnected, the piston 615 moves downward, the SF6 gas passes through the first through hole 65 and generates airflow, which can suppress the arc that may be generated when the inner conducting part 612 and the static conducting column 621 are separated; in the first disconnection state of the communication assembly 6, the SF6 gas passes through the side through hole 66 and the second through hole 67, so that airflow is generated in the adjacent position when the outer conducting part 613 and the conductive ring 622 are disconnected, which can suppress the arc that may be generated when the outer conducting part 613 and the conductive ring 622 are separated.

[0046] The first sealing assembly 1 and the second sealing assembly 10 are the same in structure and are symmetrically arranged, and include a sliding seat 11 and a support 12 arranged on the sliding seat 11; the support 12 is provided with oppositely arranged housings 13; the upper recess 131 of the upper part of the housing 13 corresponds to the upper insulator 37, the lower recess 132 of the lower part of the housing 13 corresponds to the lower insulator 36, and the wire groove 134 of the middle part of the housing 13 corresponds to the lower wiring end 34; the housings 13 of the first sealing assembly 1 and the second sealing assembly 10 are provided with detection assemblies 5 that can abut against each other.

[0047] The first sealing assembly 1 and the second sealing assembly 10 form a closed cavity around the circuit breaker 3 after the housings 13 are closed to clamp the circuit breaker 3, the detection assembly 5 is located in the closed cavity, the concentration of SF6 gas in the closed cavity is detected by the detection assembly 5, the sealing property of the circuit breaker 3 is tested, and frequent maintenance caused by poor sealing property of the circuit breaker 3 is prevented.

[0048] The detection assembly 5 comprises a base 51 fixed in a mounting groove of the housing 13, a movable body 52 movably arranged in the base 51, a sensor 55 arranged in the movable body 52 for detecting gas, a first valve assembly 53 arranged at one end of the base 51 close to the sensor 55, and a blowing assembly 54 arranged at a lower end of the base 51.

[0049] When the circuit breaker 3 is tested, the housings 13 of the first sealing assembly 1 and the second sealing assembly 10 are moved towards each other and the detection assemblies 5 on the two housings 13 are pressed against each other, the movable body 52 in the base 51 is pushed to slide, the first valve assembly 53 is opened by the movement of the movable body 52, and the blowing assembly 54 is started to send the gas in the closed space formed by the housings 13 and the circuit breaker 3 into the sensor 55 in the movable body 52, so that the detection accuracy of the sensor 55 is not affected due to uneven distribution and insufficient diffusion of the SF6 gas. When the first sealing assembly 1 and the second sealing assembly 10 are opened, the first valve assembly 53 and the blowing assembly 54 of the detection assembly 5 are in a closed state, so that the sensor 55 is in a closed and clean environment, and impurities in the external air are prevented from entering to affect the gas detection accuracy of the sensor 55.

[0050] The first valve assembly 53 comprises a fixed ring 531 in contact with an abutting portion 524 of the movable body 52, a sealing disc 533 connected to the fixed ring 531 through a support rod, a spring 532 sleeved on the support rod, two ends of the spring 532 abutting the fixed ring 531 and the base 51 respectively, and the sealing disc 533 capable of closing a first gas hole 511 on the base 51. The movable body 52 is provided with a second gas hole 522 and a third gas hole 523.

[0051] The blowing assembly 54 comprises a second valve assembly 542 movably arranged in a base body 540, a rolling ball 543 arranged at a top end of the second valve assembly 542, the rolling ball 543 abutting an inclined surface 521 at a lower end of the movable body 52, and a fan 541 arranged at a lower end of the base body 540.

[0052] When the first sealing assembly 1 and the second sealing assembly 10 are closed, the detection assemblies 5 on the two housings 13 are pressed against each other, pushing the moving body 52 to slide into the base 51, the abutting part 524 of the moving body 52 pushes the first valve assembly 53 to move to open the first air hole 511 on the base 51, the inclined surface 521 at the lower end of the moving body 52 pushes the ball 543, so that the second valve assembly 542 opens the valve hole 545 of the base 540, after the valve hole 545 is opened, the air in the closed cavity around the circuit breaker 3 is sent into the sensor 55 through the valve hole 545, the second air hole 522 and the fan 541.

[0053] While the embodiments of the application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A multifunctional preventive testing 10kV equipment electrical test bench, comprising a first sealing assembly (1) and a second sealing assembly (10) symmetrically arranged, characterized in that: The circuit breaker (3) to be tested is placed on the operating table, and the first sealing component (1) and the second sealing component (10) on both sides of the circuit breaker (3) are connected to the operating table through the guide rail; The circuit breaker (3) is provided with a base (31) at the bottom, and a support sleeve (32) is provided on the base (31). An arc-extinguishing chamber sleeve (33) is provided above the support sleeve (32), and a connecting component (6) is provided in the arc-extinguishing chamber sleeve (33). The arc-extinguishing chamber sleeve (33) is filled with gas to suppress the electric arc generated when the connecting component (6) is disconnected; The first sealing assembly (1) and the second sealing assembly (10) are also provided with a detection assembly (5); When the first sealing assembly (1) and the second sealing assembly (10) are closed with the circuit breaker (3), the gas leaking from the arc-extinguishing chamber bushing (33) is detected by the detection assembly (5); The first sealing assembly (1) and the second sealing assembly (10) have the same structure and are symmetrically arranged, including a sliding seat (11) and a bracket (12) disposed on the sliding seat (11). The bracket (12) is provided with a housing (13) disposed opposite to it; The upper groove (131) on the upper part of the housing (13) corresponds to the upper insulator (37), the lower groove (132) on the lower part of the housing (13) corresponds to the lower insulator (36), and the wire groove (134) in the middle of the housing (13) corresponds to the lower terminal (34). The housing (13) of the first sealing assembly (1) and the second sealing assembly (10) are provided with detection components (5) that can abut against each other. The detection component (5) includes a base (51) fixed in a mounting groove of the housing (13); The base (51) is provided with a movable body (52); The moving body (52) is equipped with a gas detection sensor (55); An air supply assembly (54) is provided at the lower end of the base (51). A first valve assembly (53) is provided at one end of the base (51) near the sensor (55); The first valve assembly (53) includes a retaining ring (531) that contacts the abutment portion (524) of the movable body (52). The fixing ring (531) is connected to the sealing disc (533) via the support rod; A spring (532) is sleeved on the support rod, and the two ends of the spring (532) abut against the fixing ring (531) and the base (51) respectively. The sealing disc (533) can seal the first vent (511) on the base (51). The moving body (52) is provided with a second air hole (522) and a third air hole (523); The air supply assembly (54) includes a second valve assembly (542) that is movably disposed in the base (540). The top of the second valve assembly (542) is provided with a ball (543); The ball (543) abuts against the inclined surface (521) at the lower end of the moving body (52); A fan (541) is provided at the lower end of the substrate (540).

2. The 10KV equipment electrical testing bench according to claim 1, characterized in that: The connectivity component (6) includes a first disconnected state and a second disconnected state; When the closed connecting component (6) is disconnected, the connecting component (6) sequentially passes through the first disconnected state and the second disconnected state.

3. The 10KV equipment electrical testing bench according to claim 2, characterized in that: The connecting component (6) includes a conductive moving end (61) and a conductive fixed end (62). The conductive movable end (61) is slidably disposed on the sealing seat (63), and the sealing seat (63) is connected to the support sleeve (32) and the arc-extinguishing chamber sleeve (33). The sealing seat (63) is also provided with an air supply pipe (64). The conductive moving end (61) is connected to the lower terminal (34) through the sealing seat (63); The conductive fixed end (62) is connected to the upper terminal (35) through the upper insulator (37); The upper insulator (37) is disposed at the upper end of the arc-extinguishing chamber bushing (33).

4. The 10KV equipment electrical testing bench according to claim 3, characterized in that: The conductive moving end (61) includes a movable conductive post (611) and a conductive piston (615) disposed on the upper end of the movable conductive post (611). The piston (615) is provided with an outer conductive part (613) and an inner conductive part (612) disposed inside the outer conductive part (613). A conductive brush and a sealing ring are provided between the moving conductive post (611) and the sealing seat (63); The conductive fixed end (62) includes a conductive ring (622) and a static conductive post (621) disposed inside the conductive ring (622).

5. The 10KV equipment electrical testing bench according to claim 4, characterized in that: The distance difference between the lower end of the static conductive post (621) of the conductive fixed end (62) and the lower end of the conductive ring (622) is D; The distance difference between the upper end of the inner conductive part (612) and the upper end of the outer conductive part (613) of the conductive moving end (61) is H; The D is greater than the H, such that when the connecting component (6) is in the first disconnected state, the conductive ring (622) is disengaged from the outer conductive part (613), and the static conductive post (621) remains in contact with the inner conductive part (612). When the connecting component (6) is in the second disconnected state, the conductive ring (622) is out of contact with the outer conductive part (613), and the static conductive post (621) is out of contact with the inner conductive part (612).

6. The 10KV equipment electrical testing bench according to claim 5, characterized in that: An insulating sleeve (614) is provided at the upper end of the external conductive part (613). The insulating sleeve (614) guides the engagement of the static conductive post (621) with the inner conductive part (612); The piston (615) is provided with a first through hole (65), which connects the cavity at the bottom of the piston (615) and the cavity inside the external conductive part (613). The upper end of the outer conductive part (613) is provided with a second through hole (67), and the upper outer side surface of the outer conductive part (613) is provided with a side through hole (66).

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