CN219677177U - Dielectric test switch and circuit breaker - Google Patents

Abstract

Embodiments of the present disclosure provide dielectric test switches and circuit breakers. The dielectric test switch includes: the first contact assembly comprises a first contact piece connected with a main loop of the circuit breaker and a second contact piece connected with the leakage controller; the second contact assembly comprises a connecting sheet which is arranged corresponding to the first contact sheet and the second contact sheet, and the second contact assembly can move between a first position for connecting the first contact sheet and the second contact sheet with the connecting sheet and a second position for disconnecting the first contact sheet and the second contact sheet from the connecting sheet; a pressing member provided at a side of the second contact assembly remote from the first contact assembly and capable of switching between a released state and a locked state, wherein the pressing member presses the second contact assembly from the second position to the first position in a case where the pressing member is switched from the released state to the locked state; and the reset piece drives the second contact assembly to reset from the first position to the second position and drives the pressing piece to restore to the release state under the condition that the pressing piece is released from the locking state.

Description

Dielectric test switch and circuit breaker

Technical Field

Embodiments of the present disclosure relate generally to the field of circuit breaker technology, and more particularly, to a dielectric test switch and a circuit breaker having the same.

Background

A circuit breaker is a low voltage electrical appliance for switching on and off a current and providing protection to a line and equipment in case of an overcurrent or a short circuit. In the normal use state of the circuit breaker, the leakage controller of the circuit breaker is connected with the main circuit of the circuit breaker, and the main circuit of the circuit breaker supplies power to the leakage controller. In the case of a circuit breaker for dielectric testing, the leakage controller needs to be disconnected from the main circuit of the circuit breaker.

Therefore, a dielectric test switch needs to be arranged inside the circuit breaker, and the normal use state and the dielectric test state of the circuit breaker are switched by controlling the on-off state of the switch.

Disclosure of Invention

It is an object of the present disclosure to provide a dielectric test switch and a circuit breaker to at least partially solve the above-mentioned problems.

In a first aspect of the present disclosure, there is provided a dielectric test switch adapted for dielectric testing of a circuit breaker, the dielectric test switch comprising: a first contact assembly including a first contact connected to a main circuit of the circuit breaker and a second contact connected to the leakage controller; a second contact assembly including a connection pad disposed in correspondence with the first and second contact pads, the second contact assembly being movable between a first position connecting the first and second contact pads with the connection pad and a second position disconnecting the first and second contact pads with the connection pad; a pressing member provided on a side of the second contact assembly remote from the first contact assembly and capable of switching between a released state and a locked state, wherein the pressing member presses the second contact assembly from the second position to the first position in a case where the pressing member is switched from the released state to the locked state; and a reset member, provided in correspondence with at least one of the second contact assembly and the pressing member, for urging the second contact assembly to reset from the first position to the second position and urging the pressing member to return to the released state when the pressing member is released from the locked state _。

In the embodiment according to the disclosure, the second contact assembly can be pressed from the second position to the first position by switching the pressing member from the release state to the locking state, so that the first contact and the second contact are both conducted with the connecting piece, and the leakage controller is further conducted with the circuit breaker, so that the leakage protection of the circuit breaker can be realized under the condition that the circuit breaker is in a normal use state. In addition, under the condition that the pressing piece is released from the locking state, the second contact assembly can be driven to reset from the first position to the second position through the reset piece and the pressing piece is driven to be restored to the releasing state, so that the first contact piece and the second contact piece are disconnected from the connecting piece, the leakage controller is further disconnected from the circuit breaker, and the circuit breaker is in a dielectric test state.

In summary, the dielectric test switch according to the present disclosure can stably and reliably realize a transition between a normal use state and a dielectric test state of a circuit breaker.

In some embodiments, a top cover switchable between an open state and a closed state is provided at a position of a top of the circuit breaker corresponding to the pressing piece, wherein the top cover is switchable from the open state to the closed state with the pressing piece in the locked state, and an end of the pressing piece near the top cover prevents the top cover from being switched to the closed state with the pressing piece in the released state.

In some embodiments, the dielectric test switch further comprises a support having a movement channel defined therein, the second contact assembly being disposed in the movement channel and movable along the movement channel between the first position and the second position.

In some embodiments, the second contact assembly further includes a contact portion and a penetration portion, the penetration portion being slidably inserted into the moving channel, the contact portion being disposed at an end of the penetration portion proximate to the pressing piece, the connection tab being disposed at an end of the penetration portion proximate to the first contact assembly.

In some embodiments, the return member comprises a first return spring, the contact portion being disposed opposite the support member and the first return spring being disposed between the contact portion and an opposite face of the support member, wherein the first return spring is in a compressed state with the second contact assembly in the first position and the first return spring is in an extended state with the second contact assembly in the second position.

In some embodiments, at least one of the contact portion and the opposite face of the support is provided with a limit boss, and the first return spring is sleeved on the limit boss.

In some embodiments, the dielectric test switch further comprises a stop in which the push-down member is threaded and along which it is switchable between the released state and the locked state.

In some embodiments, a first mounting hole is formed in a portion, away from the second contact assembly, of the limiting member, a second mounting hole communicated with the first mounting hole is formed in a portion, close to the second contact assembly, of the limiting member, the pressing member comprises a pressing cap and a pressing column, the pressing cap is located in the first mounting hole, and the pressing column penetrates through the second mounting hole.

In some embodiments, the return member further includes a second return spring disposed in the first mounting hole, and both ends of the second return spring abut against bottoms of the pressing cap and the first mounting hole, respectively.

In some embodiments, the pressing member further includes a locking protrusion provided on an outer side surface of the pressing cap, a limit groove extending in a pressing direction of the pressing member is provided on a sidewall of the first mounting hole, and a locking groove is provided at a position of the first mounting hole near the second mounting hole, the locking protrusion being translatable in the limit groove and rotatable in the locking groove.

In some embodiments, a clamping piece for preventing the pressing piece from being separated from the limiting piece is arranged on the outer side surface, close to the end portion of the second contact assembly, of the pressing post.

In a second aspect of the present disclosure, there is provided a circuit breaker including: a dielectric test switch according to any of the first aspects of the present disclosure; a main loop; and the first contact piece of the dielectric test switch is connected with the main loop, and the second contact piece of the dielectric test switch is connected with the leakage controller.

It should be understood that what is described in this section is not intended to limit the key features or essential features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.

Drawings

The above and other features, advantages and aspects of embodiments of the present disclosure will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, wherein like or similar reference numerals denote like or similar elements, in which:

FIG. 1 illustrates a schematic perspective cross-sectional view of a dielectric test switch according to some embodiments of the present disclosure, wherein a pressing member is in a locked state;

FIG. 2 illustrates a schematic perspective cross-sectional view of a dielectric test switch according to some embodiments of the present disclosure, wherein the pusher is in a released state;

fig. 3 illustrates a schematic structural view of a first contact assembly, a second contact assembly, and a support according to some embodiments of the present disclosure;

FIG. 4 illustrates a schematic structural view of a pressing member according to some embodiments of the present disclosure;

FIG. 5 illustrates a schematic structural view of a limiter according to some embodiments of the present disclosure;

fig. 6 illustrates a partial structural schematic diagram of a dielectric test switch according to some embodiments of the present disclosure.

Reference numerals illustrate:

100 is a circuit breaker, 101 is a mounting groove, 102 is a top cover, 10 is a dielectric test switch, and 20 is a leakage controller;

1 is a first contact assembly, 11 is a first contact, and 12 is a second contact;

2 is a second contact assembly, 21 is a connecting sheet, 22 is a contact part, and 23 is an insertion part;

3 is a pressing piece, 31 is a pressing cap, 311 is a rotating groove, 32 is a pressing post, 321 is a clamping piece, and 33 is a locking protrusion;

4 is a reset piece, 41 is a first reset spring, and 42 is a second reset spring;

5 is a supporting piece, 51 is a moving channel, and 52 is a supporting ear;

6 is a limiting boss;

7 is a limiting piece, 71 is a first mounting hole, 72 is a second mounting hole, 73 is a locking groove, and 74 is a limiting groove;

8 is a mounting shell, 81 is a limiting bar, and 82 is a threaded hole.

Detailed Description

Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present disclosure are illustrated in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The term "comprising" and variations thereof as used herein means open ended, i.e., "including but not limited to. The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment. The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like, may refer to different or the same object.

As described hereinabove, in the normal use state of the circuit breaker 100, the leakage controller 20 is connected with the main circuit of the circuit breaker 100 to monitor the leakage state of the circuit breaker 100. In the case of the circuit breaker 100 performing the dielectric test, the main circuit of the circuit breaker 100 will perform the high voltage discharge, and the leakage controller 20 needs to be disconnected from the main circuit of the circuit breaker 100 to avoid the breakdown of the electronic components inside the leakage controller 20 by the high voltage. Embodiments of the present disclosure provide a dielectric test switch 10 and a circuit breaker 100 for avoiding breakdown of the electronic components inside the leakage controller 20 by high voltage power in the event that the circuit breaker 100 performs a dielectric test. Hereinafter, the principles of the present disclosure will be described with reference to fig. 1 to 6.

The dielectric test switch 10 is suitable for dielectric testing of the circuit breaker 100, and is mounted inside the circuit breaker 100. Fig. 1 and 2 illustrate perspective cross-sectional schematic views of a dielectric test switch 10 according to some embodiments of the present disclosure. As shown in fig. 1 and 2, the dielectric test switch 10 described herein generally includes a first contact assembly 1, a second contact assembly 2, a support 5, a pressing member 3, a limiting member 7, and a reset member 4. Fig. 3 illustrates a schematic structural view of the first contact assembly 1, the second contact assembly 2, and the support 5, according to some embodiments of the present disclosure.

As shown in fig. 1-3, in some embodiments, the first contact assembly 1 includes a first contact 11 connected to the main circuit of the circuit breaker 100 and a second contact 12 connected to the leakage controller 20. That is, the first contact 11 is conducted with the circuit breaker 100, and the second contact 12 is conducted with the leakage controller 20. However, since the first contact 11 and the second contact 12 are not directly connected, the second contact assembly 2 is required to control the conduction between the first contact 11 and the second contact 12, and thus the conduction between the main circuit of the circuit breaker 100 and the leakage controller 20.

In some embodiments, the second contact assembly 2 is located above the first contact assembly 1, and the second contact assembly 2 includes a connection tab 21 adjacent to the first contact assembly 1, the connection tab 21 being disposed in correspondence with the first contact 11 and the second contact 12. The second contact assembly 2 is movable between a first position (shown in fig. 1) in which the first and second contact blades 11, 12 are connected to the connecting piece 21, and a second position (shown in fig. 2) in which the first and second contact blades 11, 12 are disconnected from the connecting piece 21. As shown in fig. 1 to 3, when the second contact assembly 2 is moved from the second position to the first position, the first contact 11 and the second contact 12 are connected to the connection piece 21, so that the circuit breaker 100 and the leakage controller 20 are electrically connected to each other. In the case of the second contact assembly 2 moving from the first position to the second position, the first contact 11 and the second contact 12 are disconnected from the connecting piece 21, thereby disconnecting the circuit breaker 100 and the leakage controller 20 from each other.

With continued reference to fig. 3, the second contact assembly 2 according to the embodiments of the present disclosure further includes a contact portion 22 and a penetration portion 23, the connection piece 21 is disposed at an end of the penetration portion 23 near the first contact assembly 1, and the contact portion 22 is disposed at an end of the penetration portion 23 remote from the first contact assembly 1. The contact portion 22 is adapted to be driven by the pressing member 3 and the reset member 4 to switch the second contact assembly 2 between the first position and the second position.

In some embodiments, as shown in fig. 3, the second contact assembly 2 is penetrated inside the support 5, and a moving channel 51 is opened on the support 5. The second contact assembly 2 is disposed in the movement channel 51 and is movable along the movement channel 51 between a first position and a second position. More specifically, the penetration portion 23 of the second contact assembly 2 is slidably inserted into the moving passage 51. That is, the movement channel 51 is used to limit the movement path of the second contact assembly 2, so as to ensure that the second contact assembly 2 can move linearly between the first position and the second position, and limit the rotation motion of the second contact assembly 2 in the lateral direction.

In some embodiments, as shown in fig. 1 and 2, the pressing member 3 is provided on a side of the second contact assembly 2 remote from the first contact assembly 1. That is, the contact portion 22 is provided at an end of the penetration portion 23 near the pressing piece 3, and the pressing piece 3 is switchable between the released state and the locked state. As shown in fig. 2, with the press 3 in the released state, the second contact assembly 2 is in the second position, in which case the first contact blade 11 and the second contact blade 12 are disconnected from the connecting piece 21. As shown in fig. 1 and 3, in the case where the pressing member 3 is switched from the released state to the locked state, the second contact assembly 2 is pressed to the first position, in which case the first contact piece 11 and the second contact piece 12 are connected with the connection piece 21.

Fig. 4 shows a schematic structural view of the pressing piece 3 according to some embodiments of the present disclosure. As shown in fig. 4, in some embodiments, the press 3 includes a press cap 31 and a press post 32, wherein the press post 32 is disposed adjacent to the contact portion 22 of the second contact assembly 2.

In some embodiments, as shown in fig. 1, with the press 3 in the locked state, the press 3 is in contact with the second contact assembly 2; as shown in fig. 2, in the case where the pressing member 3 is in the released state, the pressing member 3 is provided separately from the second contact assembly 2.

In other embodiments, the press 3 may be connected to the second contact assembly 2 at all times, whether the press 3 is in a locked state or a released state. For example, the end of the pressing member 3 near the second contact assembly 2 may be provided with a spherical protrusion, and correspondingly, the end of the second contact assembly 2 near the pressing member 3 may be provided with a spherical groove, in which the spherical protrusion is snapped. With the above configuration, in the case where the pressing member 3 rotates, the second contact assembly 2 is restricted by the moving passage 51 and cannot synchronously rotate. In other words, the second contact assembly 2 can only move up and down along the movement path 51. Alternatively, a spherical recess may be provided at the end of the pressing piece 3 near the second contact assembly 2, and correspondingly, a spherical protrusion may be provided at the end of the second contact assembly 2 near the pressing piece 3 to mate with the spherical recess.

In some embodiments, as shown in fig. 1 and 2, the pressing member 3 is provided penetrating in the stopper 7 and is switchable between a released state and a locked state along the stopper 7. The limiting member 7 is used for limiting the movement path of the pressing member 3 on the one hand, so that the pressing member 3 is switched between a release state and a locking state; on the other hand, the locking device can also be used for locking the pressing piece 3, so that the pressing piece 3 is in a locked state.

With continued reference to fig. 1, in some embodiments of the present disclosure, a first mounting hole 71 is provided in a portion of the limiter 7 remote from the second contact assembly 2, and a second mounting hole 72 communicating with the first mounting hole 71 is provided in a portion of the limiter 7 proximate to the second contact assembly 2. The pressing cap 31 is positioned in the first mounting hole 71, and the pressing post 32 is penetrated in the second mounting hole 72.

Fig. 5 shows a schematic structural view of the stopper 7 according to some embodiments of the present disclosure. As shown in fig. 5, in some embodiments of the present disclosure, a stopper groove 74 extending in the pressing direction of the pressing member 3 is provided on a side wall of the first mounting hole 71, and a locking groove 73 is provided at a position of the first mounting hole 71 near the second mounting hole 72. Accordingly, as shown in fig. 4, the pressing member 3 further includes a locking protrusion 33 provided on the outer side surface of the pressing cap 31, the locking protrusion 33 being translatable in the pressing direction of the pressing member 3 in the limit groove 74 and rotatable in the locking groove 73. With the above arrangement, with the pressing piece in the released state, it is possible to press the locking protrusion 33 of the pressing piece 3 to the position of the locking groove 73 along the stopper groove 74, and continue to rotate the pressing piece 3 to lock the locking protrusion 33 with the locking groove 73. In this case, the pressing piece 3 is locked by the stopper 7, that is, the pressing piece 3 is in a locked state.

It will be appreciated that the first contact 11 and the second contact 12 remain connected to the connecting piece 21 as the second contact assembly 2 is restricted from rotating by the moving channel 51 when the pressing member 3 is rotated with the locking protrusion 33 of the pressing member 3 pressed to the locking groove 73. In other words, the second contact assembly 2 is always in the first position during rotation of the press 3. Of course, the second contact assembly 2 is also always in the first position during the reverse rotation of the pressing member 3 such that the locking protrusion 33 of the pressing member 3 is rotated out of the locking groove 73.

The pressing piece 3 according to the embodiment of the present disclosure may be rotated clockwise or counterclockwise to lock the locking protrusion 33 with the locking groove 73, and the rotation angle may be between 10 ° and 170 °. As an example, the pressing piece 3 may be rotated 90 ° clockwise in the locking groove 73 to put the pressing piece 3 in the locked state. It should be noted that the numbers, values, numbers, etc. mentioned above and as may be referred to elsewhere in the disclosure are exemplary and are not intended to limit the scope of the disclosure in any way. Any other suitable numbers, values, numbers are possible.

As shown in fig. 4, in some embodiments, the outer side of the pressing post 32 near the end of the second contact assembly 2 is provided with a clip 321, and the clip 321 is used to prevent the pressing piece 3 from being detached from the inside of the stopper 7. In other embodiments, the end surface of the pressing cap 31 away from the clamping member 321 is further provided with a rotating groove 311, and a screwdriver can be matched inside the rotating groove 311 to rotate the pressing member 3 by rotating the screwdriver.

In some embodiments, the reset member 4 is provided corresponding to at least one of the second contact assembly 2 and the pressing member 3 for urging the second contact assembly 2 to reset from the first position to the second position and urging the pressing member 3 to return to the released state in case the pressing member 3 is released from the locked state.

The reset member 4 according to embodiments of the present disclosure may be any of various types of reset members 4 currently known or available in the future, as embodiments of the present disclosure are not limited in this regard. For example, in some embodiments, the restoring member 4 may be a member having elasticity.

In some embodiments, as shown in fig. 1 and 2, the return member 4 includes a first return spring 41 and a second return spring 42. The contact portion 22 is disposed opposite the support 5, and the first return spring 41 is disposed between the contact portion 22 and the opposite face of the support 5. The second return spring 42 is disposed in the first mounting hole 71, and both ends of the second return spring 42 abut against the pressing cap 31 and the bottom of the first mounting hole 71, respectively.

As shown in fig. 3, a limiting boss 6 is provided on at least one of the opposite surfaces of the contact portion 22 and the support 5, the first return spring 41 is sleeved on the limiting boss 6, and the limiting boss 6 is used for limiting the telescopic path of the first return spring 41.

As shown in fig. 1, with the second contact assembly 2 in the first position, the first return spring 41 is in a compressed state and the second return spring 42 is also in a compressed state. As shown in fig. 2, with the second contact assembly 2 in the second position, the first return spring 41 is in an extended state and the second return spring 42 is also in an extended state.

It will be appreciated that the first return spring 41 is used for return of the second contact assembly 2 and the second return spring 42 is used for return of the press 3. That is, the second contact assembly 2 and the pressing member 3 are individually controlled by two return springs. Therefore, in the case where the pressing piece 3 is in the released state, the pressing post 32 may be connected to the contact portion 22, or may be provided separately from the contact portion 22.

In other embodiments, the return member 4 may comprise only the first return spring 41, and the first return spring 41 is likewise arranged between the contact portion 22 and the opposite face of the support member 5. In this case, the first return spring 41 can simultaneously control the return of the second contact assembly 2 and the return of the pressing piece 3. Since the first return spring 41 is located below the pressing piece 3, the pressing post 32 may be connected to the contact portion 22 or may be provided separately from the contact portion 22 in the case where the pressing piece 3 is in the released state.

In other embodiments, the restoring member 4 may include only the second restoring spring 42, and both ends of the second restoring spring 42 abut against the bottom of the pressing cap 31 and the first mounting hole 71, respectively. I.e. the second return spring 42 simultaneously controls the return of the second contact assembly 2 and the return of the press 3. Since the second return spring 41 is located above the second contact assembly 2, the pressing post 32 needs to be connected to the contact portion 22 regardless of whether the pressing piece 3 is in the released state or the locked state. The specific connection manner is described above, and will not be described here again.

Fig. 6 illustrates a partial structural schematic diagram of a dielectric test switch 10 according to some embodiments of the present disclosure. In some embodiments, as shown in fig. 6, the dielectric test switch 10 further includes a mounting housing 8, the support 5 is disposed at a top end of the mounting housing 8, and the support 5 further includes support lugs 52 at opposite sides thereof, the support lugs 52 contacting and abutting an outer side surface of the mounting housing 8 for achieving a reliable connection of the support 5 to the mounting housing 8.

In some embodiments, the interior of the mounting housing 8 is hollow, and the first contact assembly 1 and a portion of the second contact assembly 2 are disposed within the interior of the mounting housing 8. The outer side surface of the installation shell 8 is also provided with a limit bar 81, and the limit bar 81 is used for clamping the installation shell 8 inside the circuit breaker 100. Further, a screw hole 82 is provided at the bottom of the installation housing 8, and a screw may be installed in the screw hole 82 for installing the installation housing 8 on the bottom plate of the circuit breaker 100.

In the embodiment according to the present disclosure, by switching the pressing member 3 from the released state to the locked state, the second contact assembly 2 can be pressed from the second position to the first position to make both the first contact piece 11 and the second contact piece 12 conductive with the connection piece 21, and thus the leakage controller 20 conductive with the main circuit of the circuit breaker 100, so that the leakage protection of the circuit breaker can be achieved in the case where the circuit breaker 100 is in the normal use state. In addition, in the case where the pressing member 3 is released from the locked state, the second contact assembly 2 can be driven to be reset from the first position to the second position by the reset member 4 and the pressing member 3 can be driven to be restored to the released state, so that both the first contact 11 and the second contact 12 are disconnected from the connection piece 21, and the leakage controller 20 is disconnected from the main circuit of the circuit breaker 100, thereby placing the circuit breaker 100 in the dielectric test state. It will be appreciated that the dielectric test switch 10 according to the present disclosure is capable of stably and reliably achieving a transition between a normal use state and a dielectric test state of the circuit breaker 100, satisfying the use requirements of the circuit breaker 100.

In a second aspect of the present disclosure, there is provided a circuit breaker 100, the circuit breaker 100 comprising any one of the dielectric test switches 10 disclosed according to the first aspect of the present disclosure; a main loop; and a leakage controller 20, wherein the first contact 11 of the dielectric test switch 10 is connected with the main circuit, and the second contact 12 of the dielectric test switch 10 is connected with the leakage controller 20.

As shown in fig. 1 to 2, a mounting groove 101 is provided at a position of the top of the circuit breaker 100 corresponding to the pressing piece 3. The mounting slot 101 may be used to receive a top cover 102, the top cover 102 being switchable between an open state and a closed state. With continued reference to fig. 1, with the pressing member 3 in the locked state, the top cover 102 can be switched from the open state to the closed state to close the mounting groove 101. With continued reference to fig. 2, with the pressing piece 3 in the released state, the second return spring 42 is in an extended state such that the end of the pressing piece 3 near the top cover 102 protrudes from the bottom of the mounting groove 101. In this case, the top cover 102 will be lifted by the end of the pressing member 3 near the top cover 102, cannot be placed in the mounting groove 101, and cannot be switched from the open state to the closed state. In this way, the circuit breaker 100 can be used to remind operators that the circuit breaker 100 is in a dielectric test state, so as to avoid the risk of electric shock caused by using the circuit breaker 100 by operators.

In some embodiments, the top cover 102 may be directly connected to the top of the circuit breaker 100 instead of the mounting slot 101. Similarly, in the case where the pressing member 3 is in the released state, the end of the pressing member 3 near the top cover 102 protrudes from the top of the circuit breaker 100, so that the top cover 102 cannot be closed.

In some embodiments, the top cover 102 may be transparent to facilitate an operator in viewing the status of the press 3. In other embodiments, the top cover 102 may also be opaque, as embodiments of the present disclosure are not limited in this regard.

The dielectric test switch 10 according to the embodiment of the present disclosure may be applied to various circuit breakers 100 in order to avoid breakdown of the electronic components inside the leakage controller 20 by high voltage electricity in case the circuit breaker 100 performs a dielectric test. It should be understood that the dielectric test switch 10 according to embodiments of the present disclosure may also be applied to other components, as well, embodiments of the present disclosure are not limited in this respect.

The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvement in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (12)

1. A dielectric test switch (10) adapted for dielectric testing of a circuit breaker (100), the dielectric test switch (10) comprising:

a first contact assembly (1) comprising a first contact (11) connected to a main circuit of the circuit breaker (100) and a second contact (12) connected to a leakage controller (20);

-a second contact assembly (2) comprising a connection piece (21) arranged in correspondence of said first contact piece (11) and said second contact piece (12), said second contact assembly (2) being movable between a first position in which said first contact piece (11) and said second contact piece (12) are connected to said connection piece (21) and a second position in which said first contact piece (11) and said second contact piece (12) are disconnected from said connection piece (21);

a pressing member (3) provided on a side of the second contact assembly (2) remote from the first contact assembly (1) and capable of switching between a released state and a locked state, wherein the pressing member (3) presses the second contact assembly (2) from the second position to the first position in a case where the pressing member (3) is switched from the released state to the locked state; and

and a reset piece (4) is arranged corresponding to at least one of the second contact assembly (2) and the pressing piece (3) and is used for driving the second contact assembly (2) to reset from the first position to the second position and driving the pressing piece (3) to return to the release state under the condition that the pressing piece (3) is released from the locking state.

2. The dielectric test switch (10) according to claim 1, characterized in that a top cover (102) switchable between an open state and a closed state is provided at a position of the top of the circuit breaker (100) corresponding to the pressing piece (3), wherein the top cover (102) is switchable from the open state to the closed state with the pressing piece (3) in the locked state, and an end of the pressing piece (3) close to the top cover (102) prevents the top cover (102) from being switched to the closed state with the pressing piece (3) in the released state.

3. The dielectric test switch (10) of claim 1, wherein the

The dielectric test switch (10) further comprises a support (5), a moving channel (51) is formed in the support (5), and the second contact assembly (2) is arranged in the moving channel (51) and can move between the first position and the second position along the moving channel (51).

4. A dielectric test switch (10) according to claim 3, characterized in that the second contact assembly (2) further comprises a contact portion (22) and a penetration portion (23), the penetration portion (23) being slidably inserted into the moving channel (51), the contact portion (22) being arranged at an end of the penetration portion (23) close to the pressing member (3), the connecting piece (21) being arranged at an end of the penetration portion (23) close to the first contact assembly (1).

5. The dielectric test switch (10) according to claim 4, characterized in that the return member (4) comprises a first return spring (41), the contact portion (22) being arranged opposite the support member (5) and the first return spring (41) being arranged between opposite faces of the contact portion (22) and the support member (5), wherein the first return spring (41) is in a compressed state with the second contact assembly (2) in the first position and the first return spring (41) is in an extended state with the second contact assembly (2) in the second position.

6. The dielectric test switch (10) according to claim 5, characterized in that at least one of the contact portion (22) and the opposite face of the support (5) is provided with a limit boss (6), the first return spring (41) being sleeved on the limit boss (6).

7. The dielectric test switch (10) according to claim 1, characterized in that the dielectric test switch (10) further comprises a limit piece (7), the pressing piece (3) being arranged in the limit piece (7) in a penetrating manner and being switchable along the limit piece (7) between the release state and the locking state.

8. The dielectric test switch (10) of claim 7, wherein a first mounting hole (71) is provided in a portion of the stopper (7) away from the second contact assembly (2), a second mounting hole (72) communicating with the first mounting hole (71) is provided in a portion of the stopper (7) close to the second contact assembly (2), the pressing member (3) includes a pressing cap (31) and a pressing post (32), the pressing cap (31) is located in the first mounting hole (71), and the pressing post (32) is penetrated in the second mounting hole (72).

9. The dielectric test switch (10) of claim 8, wherein the return member (4) further comprises a second return spring (42), the second return spring (42) is disposed in the first mounting hole (71), and both ends of the second return spring (42) abut against bottoms of the pressing cap (31) and the first mounting hole (71), respectively.

10. The dielectric test switch (10) according to claim 8, wherein the pressing member (3) further includes a locking protrusion (33) provided on an outer side surface of the pressing cap (31), a limit groove (74) extending in a pressing direction of the pressing member (3) is provided on a side wall of the first mounting hole (71), a locking groove (73) is provided at a position of the first mounting hole (71) close to the second mounting hole (72), and the locking protrusion (33) is translatable in the limit groove (74) and rotatable in the locking groove (73).

11. The dielectric test switch (10) according to claim 8, characterized in that the pressing post (32) is provided with a clamping piece (321) on the outer side of the end close to the second contact assembly (2) for preventing the pressing piece (3) from being detached from the limiting piece (7).

12. A circuit breaker (100), characterized in that the circuit breaker (100) comprises:

the dielectric test switch (10) according to any one of claims 1 to 11;

a main loop; and

-a leakage controller (20), wherein the first contact (11) of the dielectric test switch (10) is connected with the main loop, and the second contact (12) of the dielectric test switch (10) is connected with the leakage controller (20).