WO2023236380A1

WO2023236380A1 - Residual current operated circuit breaker

Info

Publication number: WO2023236380A1
Application number: PCT/CN2022/117552
Authority: WO
Inventors: 邵江华; 李罗斌; 杨伦
Original assignee: 浙江正泰电器股份有限公司
Priority date: 2022-06-08
Filing date: 2022-09-07
Publication date: 2023-12-14
Also published as: EP4318538A1; AU2022453596A1; CN114899055A

Abstract

A residual current operated circuit breaker, relating to the field of low-voltage electrical technology. The residual current operated circuit breaker comprises an electric leakage tripping pole module (2) as well as an L pole circuit breaker module (1) and an N pole circuit breaker module (3) which are arranged on two sides of the electric leakage tripping pole module (2); the L pole circuit breaker module comprises an L pole moving contact mechanism (12); the N pole circuit breaker module comprises an N pole moving contact mechanism (33); the electric leakage tripping pole module (2) comprises an electric leakage trip member (24), an electric leakage latch (27), a reset member (25), a rocker arm (26), an assembly shaft (28), and a release (201); the rocker arm (26) abuts against the reset member (25); the assembly shaft (28) is in linkage with the L pole moving contact mechanism (12) and the N pole moving contact mechanism (33); the rocker arm (26) is connected to one side of the electric leakage latch (27); at least one of the rocker arm (26) and the electric leakage latch (27) can abut against the assembly shaft (28); when the electric leakage trip member (24) and the electric leakage latch (27) are separated, the reset member (25) drives the rocker arm (26) to rotate, so that at least one of the rocker arm (26) and the electric leakage latch (27) pushes the assembly shaft (28). The L pole circuit breaker module (1) and the N pole circuit breaker module (3) are simultaneously broken, thereby improving the breaking capability.

Description

Residual current operated circuit breaker

Technical field

The present invention relates to the field of low-voltage electrical technology, and in particular to a residual current-operated circuit breaker.

Background technique

Leakage circuit breakers can be used to distribute electric energy and protect lines and power equipment from overloads and short circuits. They can also be used for infrequent switching of lines and infrequent starting of motors. With the continuous development of Internet of Things technology and artificial intelligence technology, small size and modularization have become the trend of leakage circuit breakers. Leakage circuit breakers usually have leakage protection functions. In traditional 1P+N leakage circuit breakers, the N-pole circuit breaker module does not have an independent closing and opening driving mechanism. The N-pole circuit breaker module is usually integrated on the L-pole circuit breaker module. The leakage tripper drives the L-pole moving contact mechanism to trip. During the tripping process of the L-pole moving contact mechanism, it drives the N-pole circuit breaker module to trip. This results in a relatively long breaking time of the N-pole circuit breaker module and the breaking of the leakage circuit breaker. The capability is poor, which also affects the life of the leakage circuit breaker.

Contents of the invention

The purpose of the present invention is to provide a residual current-operated circuit breaker that solves the problems of relatively long breaking time of the N-pole circuit breaker module, poor breaking capacity of the leakage circuit breaker, and short life of the leakage circuit breaker.

To achieve this goal, the present invention adopts the following technical solutions:

A residual current action circuit breaker, including an L-pole circuit breaker module, an earth leakage trip pole module and an N-pole circuit breaker module. The L-pole circuit breaker module and the N-pole circuit breaker module are respectively located on the leakage trip pole. On both sides of the pole module, the L-pole circuit breaker module includes an L-pole movable contact mechanism, the N-pole circuit breaker module includes an N-pole movable contact mechanism, and the leakage trip pole module includes a leakage jumper and a leakage lock. buckle, reset piece, rocker arm, assembly shaft and release, the leakage jump buckle and the leakage lock buckle can overlap each other, the rocker arm is in contact with the reset piece,

The assembly shaft is linked with the L-pole movable contact mechanism and the N-pole movable contact mechanism;

The rocker arm is connected to one side of the leakage lock, and at least one of the rocker arm and the leakage lock can abut against the assembly shaft;

When overload current or leakage current occurs in the power circuit, the tripper can push the leakage lock so that when the leakage jumper and the leakage lock are separated, the leakage lock is close to the leakage lock along the The direction of the assembly shaft rotates, and the reset member drives the rocker arm to rotate, so that at least one of the rocker arm and the leakage lock catch pushes the assembly shaft.

In some possible implementations, the leakage lock and the rocker arm can abut the assembly shaft at the same time, so that the rocker arm and the leakage lock push the assembly shaft at the same time; or,

The leakage lock can contact the assembly shaft before the rocker arm, so that the leakage lock pushes the assembly shaft; or,

The leakage lock can contact the assembly shaft before the rocker arm, and the rocker arm can contact the assembly shaft, so that the rocker arm and the leakage lock push the assembly shaft at the same time; or,

The rocker arm can contact the assembly shaft before the leakage lock, so that the rocker arm pushes the assembly shaft.

In some possible implementations, the L-pole movable contact mechanism includes an L-pole lock, and the N-pole movable contact mechanism includes an N-pole lock,

The assembly shaft is fixedly connected to the L-pole lock and has a clearance fit with the N-pole lock; or

The assembly shaft is clearance-fitted with the L-pole lock and fixedly connected with the N-pole lock; or

The assembly shaft is fixedly connected to the L-pole lock and fixedly connected to the N-pole lock.

In some possible implementations, the assembly shaft is fixedly connected to the L-pole lock and clearance-fits with the N-pole lock. When the release pushes the leakage lock, the leakage lock The buckle pushes the N pole lock catch.

In some possible implementations, the leakage lock catch includes a leakage lock catch body and an extension portion connected to the leakage current lock catch body, and the extension portion is arranged at an angle with the leakage current lock catch body, so The extension part is provided on the side of the leakage lock body facing the N-pole circuit breaker module, and the extension part can push the N-pole lock.

In some possible implementations, the assembly shaft has a clearance fit with the L-pole lock and is fixedly connected with the N-pole lock. When the release pushes the leakage lock, the leakage lock Push the L-pole lock buckle.

In some possible implementations, the leakage lock catch includes a leakage lock catch body and an extension portion connected to the leakage current lock catch body, and the extension portion is arranged at an angle with the leakage current lock catch body, so The extension part is provided on the side of the leakage lock body facing the L-pole circuit breaker module, and the extension part can push the L-pole lock.

In some possible implementations, the rocker arm is provided on a side of the leakage lock body away from the extension portion.

In some possible implementations, the rocker arm includes a rocker arm body and a first connection shaft provided on the rocker arm body, the leakage current lock is connected to the first connection shaft, and the leakage current lock The buckle can rotate around the first connection axis.

In some possible implementations, the rocker arm includes a rocker arm body and a mounting hole provided on the rocker arm body. The rocker arm body is connected to the fixed shaft of the housing through the mounting hole. The reset The component can drive the rocker arm body to rotate around the fixed axis.

In some possible implementations, the rocker arm includes a rocker arm body and a second connection shaft provided on the rocker arm body, the leakage jumper is connected to the second connection shaft, and the leakage current jumper is connected to the second connection shaft, and the leakage current jumper is connected to the second connection shaft. The jump buckle can rotate around the second connecting axis.

In some possible implementations, the rocker arm includes a rocker arm body and a bending structure connected to one end of the rocker arm body, and the bending structure is arranged around the assembly axis.

In some possible implementations, the leakage trip pole module also includes a circuit board and a status indication module. The trip unit and the status indication module are electrically connected to the circuit board respectively. The circuit board can detect Current signal. When the current signal reaches the action current threshold, the release pushes the leakage latch. The status indication module has multiple states and can present one of the multiple states.

In some possible implementations, the status indication module includes an indicator light, the leakage trip pole module also includes a test button, the test button includes a button body and a connection end, the button body is a transparent structure, and the The connection end is connected to the circuit board, and the button body is covered with the indicator light.

In some possible implementations, the leakage trip pole module further includes a zero sequence transformer, and the N-pole circuit breaker module further includes a current transformer.

Beneficial effects of the present invention:

The invention provides a residual current action circuit breaker. The leakage tripping pole module, the pole breaking module and the N pole circuit breaker module all have independent structures and are closed respectively. When the tripping device operates, the ejector rod of the tripping device When the leakage lock is pushed to rotate counterclockwise around the fixed axis, the leakage jumper of the leakage trip pole module and the leakage lock hasp are unlocked. When the hasp surfaces are separated, the reset member drives the rocker arm to rotate, and the rocker arm and the leakage lock are unlocked. At least one push assembly shaft drives the L pole moving contact mechanism and the N pole moving contact mechanism to trip at the same time. The L-pole circuit breaker module and the N-pole circuit breaker module are disconnected at the same time, ensuring the synchronization of actions and increasing the action speed to extend the service life; the L-pole circuit breaker module and the N-pole circuit breaker module are simultaneously locked by leakage through the assembly shaft At least one acting force between the buckle and the rocker arm is used to improve the breaking capacity; leakage protection and overload protection share a tripper to simplify the structure.

Description of drawings

Figure 1 is a schematic diagram of the appearance of a residual current operated circuit breaker provided by Embodiment 1 of the present invention;

Figure 2 is a schematic structural diagram of an L-pole circuit breaker module provided in Embodiment 1 of the present invention;

Figure 3 is a schematic structural diagram of the earth leakage tripping pole module in an open state according to Embodiment 1 of the present invention;

Figure 4 is a schematic structural diagram of the earth leakage tripping pole module in the closed state according to Embodiment 1 of the present invention;

Figure 5 is a schematic structural diagram of the N-pole circuit breaker module in a closed state according to Embodiment 1 of the present invention;

Figure 6 is a schematic structural diagram of the partial residual current operated circuit breaker in an open state according to Embodiment 1 of the present invention;

Figure 7 is a schematic structural diagram of the partial residual current operated circuit breaker in a closed state according to Embodiment 1 of the present invention;

Figure 8 is a schematic structural diagram of the residual current operated circuit breaker provided in Embodiment 1 of the present invention in the closed state with the outer shell removed;

Figure 9 is a schematic structural diagram of the residual current-operated circuit breaker provided in Embodiment 1 of the present invention in the open state with the outer casing removed;

Figure 10 is a schematic structural diagram of a rocker arm without a bending structure provided in Embodiment 1 of the present invention;

Figure 11 is a schematic structural diagram of the leakage lock provided by Embodiment 1 of the present invention;

Figure 12 is a schematic diagram of the assembly structure of the rocker arm, leakage lock and reset component provided by Embodiment 1 of the present invention;

Figure 13 is a schematic structural diagram of the residual current operated circuit breaker with the outer casing removed from another perspective provided by Embodiment 1 of the present invention;

Figure 14 is an exploded view of the residual current operated circuit breaker with the outer casing removed from a perspective provided by Embodiment 1 of the present invention;

Figure 15 is an exploded view of the residual current operated circuit breaker with the outer casing removed from another perspective provided by Embodiment 1 of the present invention;

FIG. 16 is a schematic structural diagram of the earth leakage tripping pole module in the open state according to Embodiment 4 of the present invention.

In the picture:

1. L pole circuit breaker module; 11. Bimetallic component; 12. L pole moving contact mechanism; 121. L pole lock; 13. L pole handle; 14. Instantaneous action coil; 15. L pole arc extinguishing chamber;

2. Leakage trip pole module; 20. Zero sequence transformer; 21. Test button; 211. Button body; 212. Connection end; 22. Trip pole handle; 23. Lever; 24. Leakage trip button; 25. Reset 26. Rocker arm; 261. Rocker arm body; 262. First connecting shaft; 263. Second connecting shaft; 264. Mounting hole; 265. Bending structure; 27. Leakage lock; 271. Extension part; 272. Leakage lock body; 2721. Connection hole; 28. Assembly shaft; 29. Circuit board; 291. Jack; 292. Indicator light; 201. Release;

3. N-pole circuit breaker module; 30. N-pole arc extinguishing chamber; 32. N-pole handle; 33. N-pole moving contact mechanism; 331. N-pole lock; 3311. First limiter; 34. Current mutual inductance device.

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only the embodiments of the present invention. Some examples, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present invention.

In the description of the present invention, unless otherwise clearly stated and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body. ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the present invention, unless otherwise expressly provided and limited, the term "above" or "below" a first feature of a second feature may include direct contact between the first and second features, or may also include the first and second features. Not in direct contact but through additional characteristic contact between them. Furthermore, the terms "above", "above" and "above" a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature. “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.

Embodiment 1

This embodiment provides a residual current operated circuit breaker, as shown in Figures 1 to 15, including a leakage tripping pole module 2, an L pole circuit breaker module 1 and an N pole located on both sides of the leakage tripping pole module 2 Circuit breaker module 3. The L-pole circuit breaker module 1 includes an L-pole movable contact mechanism 12. The N-pole circuit breaker module 3 includes an N-pole movable contact mechanism 33. The leakage trip pole module 2 includes a leakage jumper 24 and a leakage lock. 27. The reset part 25, the rocker arm 26, the assembly shaft 28 and the release 201, the leakage jumper 24 and the leakage lock 27 can overlap each other, the rocker arm 26 is in contact with the reset part 25, and the assembly shaft 28 moves with the L pole. The contact mechanism 12 and the N pole moving contact mechanism 33 are linked; the rocker arm 26 is connected to one side of the leakage lock 27, and at least one of the rocker arm 26 and the leakage lock 27 can abut against the assembly shaft 28; when using electricity When an overload current or leakage current occurs in the circuit, the tripper 201 can push the leakage lock 27, so that when the leakage jumper 24 and the leakage lock 27 are separated, the leakage lock 27 rotates in the direction close to the assembly axis 28, and the reset member 25 drives the rocker arm 26 to rotate, and at least one of the rocker arm 26 and the leakage lock 27 pushes the assembly shaft 28 .

Optionally, when the leakage jumper 24 and the leakage lock 27 are separated, the reset member 25 drives the rocker arm 26 to rotate around the fixed axis of the housing.

Working principle of residual current operated circuit breaker:

Closing state: Figure 4, Figure 5, Figure 7 and Figure 8 respectively show the leakage trip pole module 2, N pole circuit breaker module 3, partial residual current action circuit breaker and residual current action circuit breaker in the closing state with the shell structure removed. Structural diagram of the gate state, the tripper 201 and the leakage lock 27 are arranged oppositely, the leakage tripper 24 and the leakage lock 27 can overlap, the leakage trip pole module 2, the L pole circuit breaker module 1 and the N pole circuit breaker module 3 All have independent structures and can be closed separately.

Opening state: As shown in Figure 3, Figure 6 and Figure 9, when overload current or leakage current occurs in the power circuit, the release 201 can be driven to operate, and the ejector pin of the release 201 pushes the leakage lock 27 around When the fixed shaft rotates counterclockwise, the leakage jumper 24 of the leakage trip pole module 2 and the leakage lock 27 are unlocked. When the buckle surfaces are separated, the reset member 25 drives the rocker arm 26 to rotate, and the rocker arm 26 and the leakage lock At least one of the buckles 27 pushes the assembly shaft 28, and the assembly shaft 28 simultaneously drives the L-pole movable contact mechanism 12 and the N-pole movable contact mechanism 33 to trip. The L-pole circuit breaker module 1 and the N-pole circuit breaker module 3 are broken at the same time, ensuring the synchronization of actions and increasing the action speed to extend the service life; the L-pole circuit breaker module 1 and the N-pole circuit breaker module 3 are assembled through the assembly shaft 28 is affected by the force of the leakage lock 27 or the rocker arm 26, or the two forces of the leakage lock 27 and the rocker arm 26 at the same time, thereby improving the breaking capacity; the leakage protection and the overload protection share a tripper 201, simplifying the structure.

Due to the speed of the leakage lock 27 and the rocker arm 26, or the distance between the leakage lock 27 and the rocker arm 26 from the assembly axis 28, or the combined reasons of the above speed and stroke, further, when the leakage lock 27 When the rocker arm 26 pushes the assembly shaft 28, the action sequence includes four situations:

The first situation: the leakage lock 27 and the rocker arm 26 can push the assembly shaft 28 at the same time, so that the rocker arm 26 and the leakage lock 27 push the assembly shaft 28 at the same time;

The second situation: the leakage lock 27 is pushed to the assembly shaft 28; for example, the leakage lock 27 pushes 28 before the rocker arm 26, and the leakage lock 27 pushes the assembly shaft 28. The pushing force is enough and the speed is fast enough, so that L The pole circuit breaker module 1 and the N pole circuit breaker module 3 are directly unlocked, and the rocker arm 26 cannot push the assembly shaft;

The third situation: the leakage lock 27 pushes the assembly shaft 28 before the rocker arm 26, and the rocker arm 26 can contact the assembly shaft 28, so that the rocker arm 26 and the leakage lock 27 push the assembly shaft 28 at the same time; for example, leakage The lock 27 first pushes the assembly shaft 28. However, because there is no energy storage spring and the force is insufficient due to force transmission loss during the pushing process, the L pole circuit breaker module 1 and N pole circuit breaker module 3 cannot be unlocked. Then the rocker arm 26 is pushed to the assembly shaft 28 to achieve unlocking;

The fourth situation: the rocker arm 26 can contact the assembly shaft 28 before the leakage lock 27, so that the rocker arm 26 pushes the assembly shaft 28; the rocker arm 26 first pushes to the assembly shaft 28, and generates sufficient energy due to the energy storage spring. force, the L-pole circuit breaker module 1 and the N-pole circuit breaker module 3 are directly unlocked, and the leakage lock 27 cannot push the assembly shaft 28.

Specifically, as shown in Figures 2 and 5, the L-pole movable contact mechanism 12 includes an L-pole lock 121, and the N-pole movable contact mechanism 33 includes an N-pole lock 331, the L-pole lock 121 and the N-pole lock. 331 connect the two ends of the assembly shaft 28 respectively.

In this embodiment, the assembly shaft 28 is fixedly connected to the L-pole lock 121 and has a clearance fit with the N-pole lock 331. Specifically, the clearance fit refers to the first limiting member 3311 with a hole on the N-pole lock 331. , one end of the assembly shaft 28 is located in the hole of the first limiter 3311 and is not fixedly connected. When the leakage lock 27 and the rocker arm 26 push the assembly shaft 28, the action sequence is: the assembly shaft 28 first drives the L pole lock 121 , and then drive the N pole lock 331 to move. Thereby, the assembly shaft 28 is linked with the L-pole movable contact mechanism 12 and the N-pole movable contact mechanism 33 .

Further, as shown in Figures 6 and 7, when the tripper 201 pushes the leakage lock 27, the leakage lock 27 pushes the N-pole lock 331, and then the assembly shaft 28 pushes the N-pole lock 331 to move. Through the assembly, Before the shaft 28 drives the N pole lock 331 to move, the leakage lock 27 gives a force to the N pole lock 331 in advance, so that the assembled shaft 28 drives the N pole lock 331 to move faster, which improves synchronization and further improves the breaking ability. .

In this embodiment, due to the clearance fit between the first limiting member 3311 and the assembly shaft 28, the force transmission loss occurs when the assembly shaft 28 pushes the N-pole lock 331. The N-pole lock 331 moves slowly, or the N-pole lock 331 moves slowly, or the N-pole lock 331 moves slowly. 331 and the assembly shaft 28 have a long clearance stroke, etc., although the leakage lock 27 pushes the N-pole lock 331 first, it will not cause the N-pole lock 331 to contact before the leakage lock 27 and the rocker arm 26 Assembling shaft 28, even if the N pole lock 331 abuts the assembly shaft 28 before the leakage lock 27 and the rocker arm 26, it does not have enough force to push the assembly shaft 28, so that the leakage lock 27 and/or the rocker arm 26 can Push the assembly shaft 28. At this time, the action sequence of the leakage lock 27 and the rocker arm 26 when pushing the assembly shaft 28 is the same as the above four situations.

Optionally, as shown in Figures 6, 7 and 11, the leakage lock 27 is provided between the L-pole circuit breaker module 1 and the N-pole circuit breaker module 3. The leakage lock 27 includes a leakage lock body 272, which The upper end overlaps with the leakage jumper 24, and the lower end can push the N-pole lock 331; specifically, the bottom of the leakage jumper 14 is arc-shaped, and the top of the leakage lock body 272 is in an arc shape that matches the leakage jumper 14. Specifically, the leakage lock 27 also includes an extension portion 271 connected to the lower end of the leakage lock body 272. The extension portion 271 is arranged at an angle with the leakage lock body. The extension 271 is located on the leakage lock body toward N. On one side of the pole circuit breaker module 3, the extension part 271 can push the N pole lock 331, and the extension part 271 can extend into the N pole circuit breaker module to push the N pole lock 331 to further improve the breaking capacity.

In this embodiment, the extending portion 271 is perpendicular to the leakage lock. Preferably, the protruding portion 271 is perpendicular to the leakage lock body 272 .

As shown in FIG. 12 , the rocker arm 26 is provided on the side of the leakage lock body 272 away from the extension portion 271 so that the extension portion 271 can abut against the N-pole lock 331 to make the structure more compact.

As shown in Figures 10-15, in this embodiment, the rocker arm 26 includes a rocker arm body 261 and a first connecting shaft 262 provided on the rocker arm body 261. The leakage lock 27 is connected to the first connecting shaft 262, and The leakage lock 27 can rotate around the first connecting axis 262 . Specifically, when the tripper 201 pushes the leakage lock 27, the leakage lock 27 rotates around the first connecting shaft 262, thereby separating the leakage jumper 24 and the leakage lock 27. Specifically, the rocker arm body 261 and the first connecting shaft 262 may be of an integrated structure or a separate structure. In this embodiment, the leakage lock body 272 is connected to the first connecting shaft 262 through the connecting hole 2721.

In this embodiment, the rocker arm 26 also includes a mounting hole 264 provided on the rocker arm body 261. The rocker arm body 261 is connected to the fixed axis of the housing through the mounting hole 264. The reset member 25 can drive the rocker arm body 261 around the fixed axis. Rotate. Specifically, when the reset member 25 drives the rocker arm 26 to rotate, the rocker arm body 261 rotates around the fixed axis, and the leakage lock 27 and the rocker arm body 261 rotate simultaneously.

Optionally, the leakage trip pole module 2 also includes a trip pole handle 22 and a lever 23. The lever 23 is connected to the trip pole handle 22 and the leakage jumper 24. The specific connection relationship and working principle can refer to the existing technology. Again.

In this embodiment, the rocker arm 26 also includes a second connection shaft 263 provided on the rocker arm body 261 , the leakage jumper 24 is connected to the second connection shaft 263 , and the leakage jumper 24 can rotate around the second connection shaft 263 ; Specifically, when the tripper 201 pushes the leakage lock 27 to rotate the leakage lock 27 around the first connecting shaft 262, the hasp of the leakage jumper 24 and the leakage lock 27 is unlocked. On the one hand, due to the previous closing of the handle, The leakage jumper 24 is connected through the lever 23 to store energy in the leakage jumper 24. When the buckle surface is separated, the energy of the leakage jumper 24 is released and rotates; on the other hand, when the switch is closed, the leakage jumper 24 is in contact with the rocker arm 26. The rocker arm 26 is in contact with the reset part 25. The reset part 25 stores energy, and the leakage jumper 24 also stores energy. When the buckle surface is separated, the leakage jumper 24 releases energy and rotates. The above two parts work together to cause leakage. The jump buckle 24 rotates around the second connecting axis 263, thereby separating the leakage jump buckle 24 and the leakage lock buckle 27.

Further, as shown in Figures 8 and 9, the rocker arm 26 also includes a bending structure 265 connected to one end of the rocker arm body 261. The assembly shaft 28 can be located in the bending structure 265. The bending structure 265 and the assembly shaft 28 are added. The contact area improves the reliability of pushing the assembled shaft 28.

Specifically, as shown in FIGS. 9 and 10 , the second connecting shaft 263 is located at the upper part of the rocker arm body 261 , and the return member 25 is in contact with the upper part of the rocker arm body 261 . The bending structure 265 is located at the lower part of the rocker arm body 261 , and the mounting hole 264 and the first connecting shaft 262 are located in the middle of the rocker arm body 261 . The reset member 25 acts on one end of the rocker arm body 261. When the rocker arm body 261 rotates around the fixed axis, the force exerted by the bending structure 265 at the other end of the rocker arm body 261 on the assembly shaft 28 is enhanced. Specifically, the return member 25 is a torsion spring, and the torsion spring is fixed on the housing.

As shown in Figure 1, generally, the L-pole circuit breaker module 1 is arranged on the left side of the earth leakage trip pole module 2, and the N-pole circuit breaker module 3 is arranged on the right side of the earth leakage trip pole module 2.

As shown in Figure 2, optionally, the L-pole circuit breaker module 1 also includes an L-pole instantaneous action coil 14, and the L-pole instantaneous action coil 14 can push the L-pole latch 121 to trip. When a short-circuit current occurs in the main circuit, the push rod of the L-pole instantaneous action coil 14 drives the L-pole lock of the L-pole movable contact mechanism 12 to trip. The L-pole movable contact mechanism 12 drives the N pole through the assembly shaft 28 while moving. The N-pole lock 331 of the moving contact mechanism 33 trips. Optionally, the L-pole circuit breaker module 1 includes a bimetallic component 11. Generally, the bimetallic component 11 is used as an overload backup protection. Generally, the electronic overload protection operates first, and when the electronic protection fails, the bimetallic component 11 acts again. , the specific connection relationship and working principle of the bimetal component 11 can be referred to the existing technology, and will not be described in detail; further, the L pole circuit breaker module 1 includes an L pole handle 13 and an L pole arc extinguishing chamber 15. The specific connection relationship and working principle are The principles, etc. can be referred to the existing technology and will not be described again.

Optionally, the leakage trip pole module 2 also includes a circuit board 29. The release 201 is electrically connected to the circuit board 29. The circuit board 29 can detect the current signal. When the current signal reaches the action current threshold, the release 201 pushes Leakage lock 27.

Optionally, as shown in Figure 2, the leakage trip pole module 2 includes a zero sequence transformer 20, and the zero sequence transformer 20 is electrically connected to the circuit board 29. When leakage current occurs in the loop, the leakage current in the loop is detected by the zero sequence transformer 20 and analyzed and judged by the circuit board 29. When the leakage current reaches the action threshold, the tripper 201 is driven to act and then trips.

As shown in Figure 5, optionally, the N-pole circuit breaker module 3 also includes a current transformer 34, and the current transformer 34 is electrically connected to the circuit board 29. The current transformer 34 detects the overcurrent of the power circuit, and the current transformer 34 is electrically connected to the circuit board 29. Through the analysis and judgment of the circuit board 29, the circuit board 29 is electrically connected to the tripper 201. When the operating current threshold is reached, the driver The release 201 push rod moves and drives the L-pole circuit breaker module 1 and N-pole circuit breaker module 3 to trip.

Optionally, as shown in Figure 5, the N-pole circuit breaker module 3 is provided with an N-pole arc extinguishing chamber 30, which improves the breaking capacity of the N-pole circuit breaker module 3.

Optionally, as shown in FIG. 5 , the N-pole circuit breaker module 3 includes an N-pole handle 32. The specific connection relationship and working principle may refer to the existing technology and will not be described again.

Specifically, when the leakage circuit breaker has short-circuit protection and bimetallic element 11 overload protection, the L pole handle 13 and N pole handle 32 both trip, but the tripping pole handle 22 does not trip; when leakage protection and electronic overload protection trip , L-pole handle 13, N-pole handle 32, and tripping pole handle 22 are all tripped.

Embodiment 2

This embodiment provides a residual current operated circuit breaker, which has a structure that is basically the same as that of Embodiment 1, and the same parts will not be described again. The difference between this embodiment and the first embodiment is that the assembly shaft 28 has a clearance fit with the L-pole lock 121 and is fixedly connected with the N-pole lock 331 . That is, the N-pole lock 331 is not provided with the first limiter 3311, and the second limiter (not shown in the figure) with a hole is provided on the L-pole lock 121, and one end of the assembly shaft 28 is located at the second limiter. holes, no fixed connection. When the leakage lock 27 and the rocker arm 26 push the assembly shaft, the sequence of actions is that the assembly shaft 28 first drives the N pole lock 331, and then drives the L pole lock 121 to move, thereby realizing the moving contact between the assembly shaft 28 and the L pole. The mechanism 12 is linked with the N pole moving contact mechanism 33.

Further, when the tripper 201 pushes the leakage lock 27, the leakage lock 27 pushes the L-pole lock 121, and then the assembly shaft 28 pushes the L-pole lock 121 to move, and the assembly shaft 28 drives the L-pole lock 121 to move. Previously, the leakage lock 27 gave a force to the L pole lock 121 in advance, so that the assembly shaft 28 drove the L pole lock 121 to move faster, improving synchronization and further improving the breaking capacity.

In this embodiment, due to the clearance fit between the second limiting member and the assembly shaft 28 , the assembly shaft 28 causes a loss of power transmission when pushing the L-pole lock 121 , and the L-pole lock 121 moves slowly, or the L-pole lock 121 Due to reasons such as the long stroke of the clearance fit between the assembly shaft 28 and other reasons, although the leakage lock 27 pushes the L pole lock 121 first, it will not cause the L pole lock 121 to contact the assembly before the leakage lock 27 and the rocker arm 26 Axis 28. Even if the L-pole lock 121 abuts the assembly shaft 28 before the leakage lock 27 and the rocker arm 26 , it does not have enough force to push the assembly shaft 28 , so that the leakage lock 27 and/or the rocker arm 26 can push the assembly shaft 28 At this time, the action sequence of the leakage lock 27 and the rocker arm 26 when pushing the assembly shaft 28 is consistent with the four situations in the first embodiment.

Specifically, the leakage lock 27 includes a leakage lock body 272 and an extension part 271 connected to the leakage lock body 272. The extension part 271 is arranged at an angle with the leakage lock body 272, and the extension part 271 is provided on the leakage lock. The buckle body 272 faces the side of the L-pole circuit breaker module 1, and the extending portion 271 can push the L-pole lock buckle 121 to further improve the breaking capacity.

Embodiment 3

This embodiment provides a residual current operated circuit breaker, which has a structure that is basically the same as that of Embodiment 1, and the same parts will not be described again. The difference between this embodiment and the first embodiment is that the assembly shaft 28 is fixedly connected to the L-pole lock 121 and the N-pole lock 331. The assembly shaft 28 can drive the L-pole lock 121 and the N-pole lock 331 at the same time. , when the assembly shaft 28 directly pushes the L pole lock 121 and the N pole lock 331 respectively, the force transmission loss is greatly reduced. When the leakage lock 27 and/or the rocker arm 26 push the assembly shaft 28, the leakage lock 27 does not push the L-pole lock 121 or the N-pole lock 331. At this time, the four situations are consistent with the first embodiment.

In addition, since in this embodiment, the assembly shaft 28 can drive the L-pole lock 121 and the N-pole lock 331 to move at the same time, the synchronization is high. Therefore, there is no need to provide an extension portion 271 on the leakage latch 27 to push the N-pole latch 331 or the L-pole latch 121 .

Embodiment 4

This embodiment provides a residual current operated circuit breaker, which has basically the same structure as Embodiment 1, Embodiment 2 and Embodiment 3, and the same parts will not be described again. The difference between this embodiment and Embodiment 1, Embodiment 2 and Embodiment 3 is that, as shown in Figure 16, the circuit board 29 is powered on and connected to a status indication module. The status indication module has multiple states and can selectively display one of them. A state, the status indication module can present different states according to different currents for easy identification.

Optionally, the status indication module includes an indicator light 292 and a test button 21. The test button 21 includes a button body 211 and a connecting end 212. The button body 211 is a transparent structure. The connecting end 212 is connected to the circuit board 29. The button body 211 is covered. It is provided on the indicator light 292, and the fault status of the circuit breaker is displayed through the indicator light 292, and is intuitively displayed to the user through the button body 211.

Optionally, the state of the indicator light 292 is one of multiple colors, one of multiple flashing frequencies, or a combination of one of multiple colors and one of multiple flashing frequencies.

Specifically, a combination of blue and flashing frequency can be used for indication. An indicator light 292 is provided on the circuit board 29 to distinguish two protection states. For example, the test button 21 displays blue during normal operation. When leakage protection occurs, The test button 21 continues to display blue, and the tripping pole handle 22 is in a tripped state. When electronic overload protection occurs, the test button 21 flashes blue, and the tripping pole handle 22 does not appear in a tripped state, which can further distinguish the electronic overload protection. with leakage protection. Of course, you can also test other states of the button 21, such as displaying different colors, or displaying different flashing frequencies, to display two different states.

Further, when the residual current-operated circuit breaker has more functions, such as short-circuit protection, electronic overload protection, bimetallic element 11 overload protection as backup protection, leakage protection, over- and under-voltage protection current detection, etc., the circuit board 29 is provided with a jack 291. The jack 291 can be used as a current calibration hole set at the incoming and outgoing ends, or the jack 291 can also be used as a communication port. Short-circuit faults, overload faults, and leakage fault conditions are activated by the residual current. The test button 21 is visually displayed. The status indication of the indicator light 292, the action status of the L pole handle 13, the trip pole handle 22 and the N pole handle 32 correspond to the corresponding fault relationships as follows:

When the circuit breaker is working normally, it displays blue; it indicates a short-circuit fault, the L pole handle 13 and the N pole handle 32 trip, and the tripping pole handle 22 does not trip; it indicates an overload fault, the L pole handle 13 and the N pole handle 32 trip, and the tripping pole Handle 22 tripped, indicator light 292 showed red; indicating leakage fault, L pole handle 13 and N pole handle 32 tripped, tripping pole handle 22 tripped, indicator light 292 showed blue; electrical circuit overvoltage fault, L pole handle 13 The N-pole handle 32 trips, the tripping pole handle 22 trips, and the indicator light 292 displays yellow; the power circuit is under-voltage, the L-pole handle 13 and the N-pole handle 32 trip, the tripping pole handle 22 trips, and the indicator light 292 displays yellow Flashing.

Of course, the color of the indicator light 292 is not limited to the above-mentioned ones, and the status can also be indicated by changing the flashing frequency of the indicator light 292, which will not be described again.

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. An exhaustive list of all implementations is neither necessary nor possible. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

A residual current-operated circuit breaker, including an L-pole circuit breaker module (1), a leakage trip pole module (2) and an N-pole circuit breaker module (3). The L-pole circuit breaker module (1) and the N-pole circuit breaker module (1) Pole circuit breaker modules (3) are respectively provided on both sides of the leakage trip pole module (2). The L-pole circuit breaker module (1) includes an L-pole movable contact mechanism (12), and the N-pole circuit breaker The device module (3) includes an N-pole movable contact mechanism (33), which is characterized in that the leakage trip pole module (2) includes a leakage jumper (24), a leakage lock (27), and a reset piece (25) , rocker arm (26), assembly shaft (28) and release (201), the leakage jumper (24) and the leakage lock (27) can overlap each other, the rocker arm (26) and the leakage lock (27) can overlap each other. The reset member (25) is in contact;

The assembly shaft (28) is linked with the L-pole movable contact mechanism (12) and the N-pole movable contact mechanism (33);

The rocker arm (26) is connected to one side of the leakage lock (27), and at least one of the rocker arm (26) and the leakage lock (27) can abut against the assembly shaft (27). 28);

When overload current or leakage current occurs in the power circuit, the tripper (201) can push the leakage lock (27), causing the leakage trip button (24) and the leakage lock (27) When separated, the leakage lock (27) rotates in a direction close to the assembly axis (28), and the reset member (25) drives the rocker arm (26) to rotate, so that the rocker arm (26 ) and at least one of the leakage lock (27) pushes the assembly shaft (28).
The residual current operated circuit breaker according to claim 1, characterized in that:

The leakage lock (27) and the rocker arm (26) can abut the assembly shaft (28) at the same time, so that the rocker arm (26) and the leakage lock (27) push the assembly shaft at the same time (28); or,

The leakage lock (27) can contact the assembly shaft (28) before the rocker arm (26), so that the leakage lock (27) pushes the assembly shaft (28); or,

The leakage lock (27) can contact the assembly shaft (28) before the rocker arm (26), and the rocker arm (26) can contact the assembly shaft (28), so that the rocker arm (26) can contact the assembly shaft (28). 26) and the leakage lock (27) push the assembly shaft (28) at the same time; or,

The rocker arm (26) can contact the assembly shaft (28) before the leakage lock (27), so that the rocker arm (26) pushes the assembly shaft (28).
The residual current-operated circuit breaker according to claim 1, characterized in that the L-pole movable contact mechanism (12) includes an L-pole lock (121), and the N-pole movable contact mechanism (33) includes an N-pole lock. buckle(331),

The assembly shaft (28) is fixedly connected to the L-pole lock (121), and has a clearance fit with the N-pole lock (331); or,

The assembly shaft (28) has a clearance fit with the L-pole lock (121) and is fixedly connected with the N-pole lock (331); or,

The assembly shaft (28) is fixedly connected to the L-pole lock (121) and fixedly connected to the N-pole lock (331).
The residual current operated circuit breaker according to claim 3, characterized in that the assembly shaft (28) is fixedly connected to the L-pole lock (121) and has a clearance fit with the N-pole lock (331). , when the tripper (201) pushes the leakage lock (27), the leakage lock (27) pushes the N-pole lock (331).
The residual current operated circuit breaker according to claim 4, characterized in that the leakage lock (27) includes a leakage lock body (272) and an extension portion (272) connected to the leakage lock body (272). 271), the extension portion (271) is arranged at an angle with the leakage lock body (272), and the extension portion (271) is located on the leakage lock body (272) toward the N pole. On one side of the circuit breaker module (3), the extension portion (271) can push the N-pole lock (331).
The residual current operated circuit breaker according to claim 3, characterized in that the assembly shaft (28) has a clearance fit with the L-pole lock (121) and is fixedly connected with the N-pole lock (331). , when the tripper (201) pushes the leakage lock (27), the leakage lock (27) pushes the L-pole lock (121).
The residual current operated circuit breaker according to claim 6, wherein the leakage lock (27) includes a leakage lock body (272) and an extension portion (272) connected to the leakage lock body (272). 271), the extension portion (271) is arranged at an angle with the leakage lock body (272), and the extension portion (271) is located on the leakage lock body (272) toward the L pole On one side of the circuit breaker module (1), the extension portion (271) can push the L-pole lock (121).
The residual current-operated circuit breaker according to claim 5 or 7, characterized in that the rocker arm (26) is provided on a side of the leakage lock body (272) away from the extension portion (271).
The residual current-operated circuit breaker according to any one of claims 1 to 7, characterized in that the rocker arm (26) includes a rocker arm body (261) and a third rocker arm body (261). A connecting shaft (262), the leakage lock (27) is connected to the first connecting shaft (262), and the leakage lock (27) can rotate around the first connecting shaft (262).
The residual current operated circuit breaker according to any one of claims 1 to 7, characterized in that the rocker arm (26) includes a rocker arm body (261) and a mounting plate provided on the rocker arm body (261). hole (264), the rocker arm body (261) is connected to the fixed shaft of the housing through the mounting hole (264), and the reset member (25) can drive the rocker arm body (261) around the fixed shaft. axis rotation.
The residual current-operated circuit breaker according to any one of claims 1 to 7, characterized in that the rocker arm (26) includes a rocker arm body (261) and a third rocker arm body (261). Two connection shafts (263), the leakage jumper (24) is connected to the second connection shaft (263), and the leakage jumper (24) can rotate around the second connection shaft (263).
The residual current operated circuit breaker according to any one of claims 1 to 7, characterized in that the rocker arm (26) includes a rocker arm body (261) and an elbow connected to one end of the rocker arm body (261). A folding structure (265) is provided around the assembly axis (28).
The residual current-operated circuit breaker according to any one of claims 1 to 7, characterized in that the leakage trip pole module (2) also includes a circuit board (29) and a status indication module, and the tripper (2) 201) and the status indication module are electrically connected to the circuit board (29) respectively. The circuit board (29) can detect a current signal. When the current signal reaches the action current threshold, the tripper (201) 201) Push the leakage latch (27), the status indication module has multiple states and can present one of the multiple states.
The residual current operated circuit breaker according to claim 13, characterized in that the status indication module includes an indicator light (292), the leakage trip pole module (2) further includes a test button (21), and the test button The button (21) includes a button body (211) and a connecting end (212). The button body (211) is a transparent structure. The connecting end (212) is connected to the circuit board (29). The button body (212) is connected to the circuit board (29). 211) is covered with the indicator light (292).
The residual current-operated circuit breaker according to any one of claims 1 to 7, characterized in that the leakage trip pole module (2) also includes a zero sequence transformer (20), and the N-pole circuit breaker module (2) 3) Also includes a current transformer (34).