CN212967551U

CN212967551U - Residual current circuit breaker

Info

Publication number: CN212967551U
Application number: CN202021471843.7U
Authority: CN
Inventors: 徐照伟; 郭得道; 赵燕威
Original assignee: Zhejiang Vostto Electric Co ltd
Current assignee: Zhejiang Vostto Electric Co ltd
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2021-04-13
Anticipated expiration: 2030-07-23

Abstract

The utility model discloses a leakage circuit breaker, which relates to the technical field of circuit breakers and comprises a shell, wherein the shell is provided with an L-pole incoming and outgoing line column, an N-pole incoming and outgoing line column, a magnetic tripping mechanism, an operating mechanism, a thermal tripping mechanism and an arc extinguishing system; the operating mechanism is connected with one end of the tripping frame; the other end of the tripping frame is connected with the L-pole moving contact and the N-pole moving contact; the rotating wheel is positioned below the tripping frame, the rotating wheel is connected with one end of a moving contact pressure spring, and one side of the other end of the moving contact pressure spring is connected with one end of an L-pole moving contact; the other side of the other end of the moving contact pressure spring is connected with one end of the N-pole moving contact; the other end of the L-pole moving contact is in separable contact with the L-pole static contact; the other end of the N-pole moving contact is in separable contact with the N-pole static contact. Aiming at the technical problem that the circuit breaker in the prior art has incomplete arc extinction and secondary arcing, the N pole is provided with an arc extinction rib, the product space design is optimized, and the electric arc can be effectively isolated and extinguished.

Description

Residual current circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field, concretely relates to residual current circuit breaker.

Background

The RCBO circuit breaker is a mechanical switching device for switching on, carrying and breaking a current under normal circuit conditions, and capable of opening contacts when a residual current reaches a prescribed value under prescribed conditions, and switching on a current for a certain time and automatically breaking even under prescribed abnormal circuit conditions (e.g., short circuit). The L pole of the existing RCBO circuit breaker generally comprises a magnetic notch breaker (containing movable iron cores, static iron cores, iron core springs, magnetic yokes, static contact rods, electromagnetic coils, coil frameworks, coils, ejector rods and other parts), an operating mechanism (containing handles, connecting rods, jump buckles, lock catches, notch breaking frames, levers, lock catch springs, contact springs, reset springs, movable contacts and contact supporting pieces), a thermal notch breaker (containing bimetallic supports and other parts), an arc extinguishing system (containing arc striking pieces, arc isolating pieces, magnetic conductive plates, arc extinguishing chambers and other parts), a circuit board and a mutual inductor; the N pole is also provided with an arc extinguishing system (including arc striking plates, arc isolating plates, arc extinguishing chambers and other parts); but still has the technical problem that the arc extinction is not complete and secondary arcing is formed.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

There is the technical problem that the arc extinguishing does not thoroughly form the secondary arcing to the circuit breaker among the prior art, the utility model provides a leakage circuit breaker, it has set up an arc extinguishing muscle, can effectually keep apart and extinguish electric arc.

2. Technical scheme

In order to solve the above problem, the utility model provides a technical scheme does:

a leakage circuit breaker comprises a shell, wherein an L-pole inlet and outlet wire column, an N-pole inlet and outlet wire column, a magnetic tripping mechanism, an operating mechanism, a thermal tripping mechanism and an arc extinguishing system are arranged on the shell; the operating mechanism is connected with one end of the tripping frame; the other end of the tripping frame is connected with the L-pole moving contact and the N-pole moving contact; the rotating wheel is positioned below the tripping frame, the rotating wheel is connected with one end of a moving contact pressure spring, and one side of the other end of the moving contact pressure spring is connected with one end of an L-pole moving contact; the other side of the other end of the moving contact pressure spring is connected with one end of an N-pole moving contact; the other end of the L-pole moving contact is in separable contact with the L-pole static contact; the other end of the N-pole moving contact is in separable contact with the N-pole static contact; the arc extinguishing system comprises an arc extinguishing chamber and an arc extinguishing rib, wherein the arc extinguishing chamber is used for eliminating electric arcs generated at the separation position of the L-pole static contact and the L-pole moving contact; the arc extinguishing rib is used for eliminating electric arcs generated at the separation position of the N-pole static contact and the N-pole moving contact; the magnetic tripping mechanism comprises a coil connected with an L-pole fixed contact, a movable iron core, a coil framework positioned in the coil and a leakage coil positioned in the coil framework, wherein the movable iron core, a coil pressure spring and an ejector rod are sequentially arranged in the leakage coil from one end of the leakage coil, the other end of the leakage coil is provided with a fixed iron core, and a hole through which the ejector rod can pass is formed in the fixed iron core; the leakage coil is connected with the output end of the circuit board, and the input end of the circuit board is connected with the output end of the magnetic ring; the L-pole lead, the N-pole lead and the lead of the testing mechanism all penetrate through the magnetic ring; the thermal tripping mechanism comprises a bimetallic strip, one end of the bimetallic strip is connected with the L-pole moving contact through a first copper conductor, the other end of the bimetallic strip is connected with the L-pole conductor through a second copper conductor, and one end of the bimetallic strip is adjacent to an end plate at one end of the tripping pull rod and is provided with a gap; the other end of the tripping pull rod is connected with the tripping frame.

Optionally, the operating mechanism comprises a handle, a tripping frame and a rotating wheel which are detachably engaged with each other, a handle torsion spring, a tripping tension spring, a tripping compression spring and a U-shaped rod; one end of the handle torsion spring is fixedly connected with the shell, the handle torsion spring body is assembled in a cylindrical hole in the center of the circular part of the handle, and the other end of the handle torsion spring is fixed on the surface of the circular part of the handle; one end of the U-shaped rod is inserted into the circular part of the handle, the other end of the U-shaped rod is clamped with the tripping frame and one end of the rotating wheel, the other end of the rotating wheel is connected with one end of the tripping pressure spring, and the other end of the tripping pressure spring is connected with the tripping frame.

Optionally, the circuit board further comprises a partition board for isolating the circuit board.

Optionally, the N-pole wire inlet/outlet column is located on the other side of the housing, the N-pole wire inlet/outlet column includes an N-pole wire outlet column and a fourth wiring board connected to the N-pole wire outlet column, and the N-pole wire outlet column and the fourth wiring board are both located at an edge of one end of the other side of the housing; the N-pole wire inlet and outlet column further comprises an N-pole wire inlet column and a third wiring board connected with the N-pole wire inlet column, and the N-pole wire inlet column and the third wiring board are both located at the edge of the other end of the other side of the shell.

Optionally, the thermal trip mechanism further includes a bimetallic support for supporting the bimetallic strip, and the bimetallic strip is connected to the bimetallic support; the other end of the bimetallic strip is adjacent to the adjusting screw.

Optionally, the testing device further comprises a testing mechanism, wherein the testing mechanism comprises a testing button, a testing button pressure spring, a button rib piece I and a button rib piece II which are connected with the L pole, and a testing button torsion spring which is contacted with the testing button pressure spring; the testing button torsional spring is fixed on the shell and connected with the N pole, one end of the testing button torsional spring is positioned at the bottom of the testing button, and one end of the testing button compressed spring is positioned below the bottom of the testing button; and a first button rib sheet and a second button rib sheet are arranged at the other end of the test button pressure spring.

Optionally, the L-pole wire inlet and outlet column is located at one side of the housing, the L-pole wire inlet and outlet column includes an L-pole wire inlet column located on the middle seat, and a first wiring board connected to the L-pole wire inlet column, and the middle seat and the first wiring board are both located at an edge of one end of one side of the housing; the L pole inlet and outlet wire column further comprises an L pole outlet wire column and a second wiring board connected with the L pole outlet wire column, and the L pole outlet wire column and the first wiring board are both located at the edge of the other end of one side of the shell.

Optionally, the adjusting screw includes an adjusting bolt and an adjusting screw, one end of the bimetal piece far away from the first copper wire is adjacent to the adjusting screw penetrating through the adjusting bolt, and the adjusting bolt is fixed on the housing.

Optionally, the arc extinguishing chamber and the arc extinguishing rib are respectively arranged on two sides of the shell, and the arc extinguishing rib is connected with the shell; and a fixing plate is arranged on the shell at the position of the L-pole static contact and is connected with the arc extinguish chamber.

Optionally, the other end of the rotating wheel is provided with a first protrusion matched with one end of the tripping pressure spring, and the tripping frame is provided with a second protrusion matched with the other end of the tripping pressure spring.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

(1) in the leakage circuit breaker provided by the embodiment of the application, the operating mechanism acts to drive the tripping frame to act, and the tripping frame acts to drive the moving contact pressure spring to act, so that the L-pole moving contact is separated from or contacted with the L-pole static contact; the N-pole moving contact is separated from or contacted with the N-pole fixed contact, so that the leakage circuit breaker is closed or opened; the L-pole static contact leads electric arcs generated when the N-pole moving contact is separated from the N-pole static contact into the arc extinguish chamber, and the N-pole static contact leads the electric arcs generated when the N-pole moving contact is separated from the N-pole static contact onto the arc extinguish rib for arc extinction, so that the contact is prevented from being burnt out by the electric arcs.

(2) According to the leakage circuit breaker provided by the embodiment of the application, the L-pole moving contact and the L-pole static contact can be quickly separated by utilizing the compression elasticity of the moving contact pressure spring and the tripping pressure spring and the tension force of the tripping tension spring; the N-pole moving contact is quickly separated from the N-pole fixed contact; the secondary arcing phenomenon is generated, and the safety and the reliability of the contact are ensured. When the L-pole moving contact is separated from the L-pole fixed contact; the N-pole moving contact is separated from the N-pole fixed contact; in order to start the breaker again, the handle drives the U-shaped rod to act through the handle torsion spring, and then drives the rotating wheel and the tripping frame to act in sequence, so that the L-pole moving contact is contacted with the L-pole static contact; the N-pole moving contact is in contact with the N-pole fixed contact, and the tripping pressure spring and the moving contact pressure spring which are in a compressed state generate elastic force, so that the L-pole moving contact can be in full and reliable contact with the L-pole fixed contact, and the N-pole moving contact is in full and reliable contact with the N-pole fixed contact.

(3) The electric leakage circuit breaker provided by the embodiment of the application has the advantages that the partition plate is used for isolating the circuit board and the circuit board are current amplifying circuits, belong to weak current circuit boards, and prevent electric arcs generated when contacts are separated or heat generated when a circuit is overloaded from being damaged by the isolation effect of the partition plate.

(4) The embodiment of the application provides a leakage circuit breaker, makes N utmost point inlet wire post and N utmost point outlet wire post locate respectively the both ends of casing realize that circuit breaker one end is the inlet wire end, and the other end is the outlet wire end, ensure circuit safe and reliable. The L-pole wire inlet column and the L-pole wire outlet column are respectively arranged at two ends of the shell, so that one end of the breaker is a wire inlet end, and the other end of the breaker is a wire outlet end, and the safety and reliability of the circuit are ensured.

(5) According to the leakage circuit breaker provided by the embodiment of the application, the gap between the tripping pull rod and the bimetallic strip can be adjusted through the adjusting screw, under the condition that the bimetallic strip is deformed under the same thermal effect, the gap is different in size, and the time for the bimetallic strip to drive the tripping pull rod to act is different; the size of the gap is changed, the time for changing and separating the static contact can be changed, and the breaker can be quickly disconnected when the circuit is overloaded.

(6) The embodiment of the application provides a leakage circuit breaker, accredited testing organization is used for detecting whether effective leakage protection function, and accredited testing organization is used for simulating to produce the leakage current promptly, judges whether leakage circuit breaker can normally act the disconnection after sensing the leakage current, passes through accredited testing organization simulation leakage current at every other period, is used for detecting whether effective leakage protection function of leakage circuit breaker.

(7) The electric leakage circuit breaker provided by the embodiment of the application enables the L pole wire inlet column and the L pole wire outlet column to be respectively arranged at the two ends of the shell, one end of the circuit breaker is an wire inlet end, the other end of the circuit breaker is a wire outlet end, and safety and reliability of a circuit are guaranteed. The arc extinguishing system further comprises a first arc striking plate and a second arc striking plate, one end of the arc striking plate is connected with the arc extinguishing chamber, and the other end of the arc striking plate is fixedly connected with the double-metal supporting piece; one end of the second arc striking piece is positioned at the N-pole moving contact, and the other end of the second arc striking piece is connected with the arc extinguishing rib; the effect of complete arc extinction is realized.

(8) According to the residual current circuit breaker provided by the embodiment of the application, an N pole of an existing circuit breaker product is provided with an arc extinguish chamber, and the space occupation ratio is large; this application embodiment sets up an arc extinguishing muscle at the N utmost point, and is effectual with electric arc isolation and extinguish, reduces the space ratio, improves the problem of circuit breaker product overall arrangement difficulty.

Drawings

Fig. 1 is a schematic diagram of an L-pole structure of a residual current circuit breaker according to an embodiment of the present invention.；

Fig. 2 is a schematic diagram of an N-pole structure of a residual current circuit breaker according to an embodiment of the present invention.；

Fig. 3 is a schematic structural view of a thermal trip mechanism according to an embodiment of the present invention.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

Example 1

With reference to fig. 1-2, the present embodiment provides a residual current circuit breaker, which includes a housing 42, where the housing 42 is provided with an L-pole incoming and outgoing line column, an N-pole incoming and outgoing line column, a magnetic trip mechanism, an operating mechanism, a thermal trip mechanism, and an arc extinguishing system; wherein, the operating mechanism is connected with one end of the trip frame 16; the other end of the tripping frame 16 is connected with an L pole moving contact 21 and an N pole moving contact 37; the rotating wheel 15 is positioned below the tripping frame 16, the rotating wheel 15 is connected with one end of a movable contact pressure spring 19, and one side of the other end of the movable contact pressure spring 19 is connected with one end of an L-pole movable contact 21; the other side of the other end of the moving contact pressure spring 19 is connected with one end of an N-pole moving contact 37; the other end of the L-pole moving contact 21 is in separable contact with the L-pole static contact 11; the other end of the N pole moving contact 37 is in separable contact with the N pole static contact 44; the arc extinguishing system comprises an arc extinguishing chamber 13 and an arc extinguishing rib 131, wherein the arc extinguishing chamber 13 is used for eliminating electric arcs generated at the separation position of the L-pole static contact 11 and the L-pole moving contact 21; the arc extinguishing ribs are used for eliminating electric arcs generated at the separation position of the N-pole fixed contact 44 and the N-pole movable contact 37; the magnetic tripping mechanism comprises a coil 51 connected with the L-pole fixed contact 11, a movable iron core 7, a coil framework 6 positioned in the coil 51, a leakage coil 52 positioned in the coil framework 6, wherein the movable iron core 7, a coil pressure spring 8 and an ejector rod 10 are sequentially arranged in the leakage coil 52 from one end of the leakage coil 52, a fixed iron core 47 is arranged at the other end of the leakage coil 52, and a hole through which the ejector rod 10 can penetrate is formed in the fixed iron core 47; the top rod 10 can pass through the hole to push the tripping frame 16, so that the L-pole moving contact 21 is separated from the L-pole fixed contact 11; the N pole moving contact 37 is separated from the N pole fixed contact 44; the leakage coil 52 is connected with the output end of the circuit board 41, and the input end of the circuit board 41 is connected with the output end of the magnetic ring 43; the L pole lead, the N pole lead and the lead of the testing mechanism all penetrate through the magnetic ring 43; the thermal tripping mechanism comprises a bimetallic strip 28, one end of the bimetallic strip 28 is connected with the L-pole moving contact 21 through a first copper conductor 23, the other end of the bimetallic strip 28 is connected with the L-pole conductor through a second copper conductor 29, one end of the bimetallic strip 28 is adjacent to an end plate at one end of the tripping pull rod 24, and a certain gap is kept between one end of the bimetallic strip 28 and the end plate at one end of the tripping pull rod 24 in a normal state. The other end of the trip rod 24 is connected to the trip frame 16, and as one of the possible embodiments of this embodiment, the connection mode between the other end of the trip rod 24 and the trip frame 16 may be: the other end of the tripping pull rod 24 is provided with a columnar protrusion, and the tripping frame 16 is provided with a hole into which the columnar protrusion can be inserted, so that the other end of the tripping pull rod 24 is connected with the tripping frame 16.

When the line is overloaded, the bimetallic strip 28 is heated, deformed and bent to a certain degree, and then acts on and butts against the end plate at one end of the tripping pull rod 24, so as to pull the tripping pull rod 24 to move, thereby driving the tripping frame 16 to move, and the tripping frame 16 moves to separate the movable contact from the fixed contact, thereby realizing overload protection.

The operating mechanism acts to drive the tripping frame 16 to act, and the tripping frame 16 acts to drive the moving contact pressure spring 19 to act, so that the L-pole moving contact 21 is separated from or contacted with the L-pole static contact 11; the N-pole moving contact 37 is separated from or contacted with the N-pole fixed contact 44, so that the leakage breaker is turned off or on.

An arc generated when the L-pole moving contact 21 is separated from the L-pole static contact 11 is led into the arc extinguishing chamber 13 by the L-pole static contact 11 through the first arc striking plate 32, and an arc generated when the N-pole moving contact 37 is separated from the N-pole static contact 44 is led onto the arc extinguishing rib 131 by the N-pole static contact 44 through the second arc striking plate 38 to extinguish the arc, so that the contact is prevented from being burnt out by the arc;

when leakage current (namely residual current) exists in a circuit, the magnetic ring 43 induces the leakage current and feeds the leakage current back to the circuit board 41 for amplification, the amplified leakage current is input to the leakage coil 52, the leakage coil 52 is electrified, the movable iron core 7 is attracted to act by utilizing the electromagnetic effect of the leakage coil 52, the movable iron core 7 pushes the ejector rod 10 to act, and the ejector rod 10 can penetrate through a hole in the static iron core 47 to push the trip frame 16 so as to separate the L-pole moving contact 21 from the L-pole static contact 11; the N-pole moving contact 37 is separated from the N-pole fixed contact 44, so that the leakage protection of the circuit breaker is realized.

When a short circuit occurs in the circuit, a short-circuit current exists, the short-circuit current is transmitted to the coil 51 and the static iron core 47 through the L-pole static contact 11, the coil 51 and the static iron core 47 are both electrified, the coil 51 and the static iron core 47 attract the movable iron core 7 to act by utilizing the electromagnetic effect of the coil 51 and the static iron core 47, the movable iron core 7 pushes the ejector rod 10 to act, and the ejector rod 10 can penetrate through a hole in the static iron core 47 to push the trip frame 16 so as to separate the L-pole movable contact 21 from the L-pole static contact 11; the N-pole moving contact 37 is separated from the N-pole fixed contact 44, so as to realize short-circuit protection of the circuit breaker.

When the circuit is overloaded, the bimetal strip 28 is heated and deformed, i.e., bent, and as the bimetal strip 28 is continuously heated, the degree of bending of the bimetal strip 28 is gradually increased, one end of the bimetal strip 28 gradually approaches the end plate at one end of the trip rod 24 until one end of the bimetal strip 28 contacts the end plate at one end of the trip rod 24, and in the process that the bimetal strip 28 is continuously heated, deformed and bent, the trip rod 24 is pulled to move through the end plate, so that the trip frame 16 moves to separate the moving contact and the static contact (i.e., the L-pole moving contact 21 is separated from the L-pole static contact 11, and the N-pole moving contact 37 is separated from the N-pole static contact 44), thereby implementing overload protection of the circuit breaker.

Example 2

With reference to fig. 1-2, the present embodiment provides an electrical leakage breaker, which is improved based on the technical solution of embodiment 1 as follows: the operating mechanism comprises a handle 1, a tripping frame 16 and a rotating wheel 15 which are detachably meshed with each other, a handle torsion spring 3, a tripping tension spring 4, a tripping compression spring 18 and a U-shaped rod 2; 3 one end of handle torsional spring and casing 42 fixed connection, the assembly of 3 bodies of handle torsional spring is in the column hole of the center department of the circular portion of handle 1, the 3 other ends of handle torsional spring are fixed the circular portion of handle 1 on the surface, as one of the embodiment of this embodiment, the circular portion of handle 1 is equipped with on the surface and is used for placing the bar groove of the 3 other ends of handle torsional spring to fixed handle torsional spring 3 produces torsion when handle 1 rotates.

One end of the U-shaped rod 2 is inserted into the circular part of the handle 1, the other end of the U-shaped rod 2 is clamped with the tripping frame 16 and one end of the rotating wheel 15, the other end of the rotating wheel 15 is connected with one end of a tripping pressure spring 18, and the other end of the tripping pressure spring 18 is connected with the tripping frame 16; as one of the possible implementation manners of this embodiment, a first protrusion matched with one end of the tripping pressure spring 18 is arranged at the other end of the rotating wheel 15; so that the first projection can be inserted into one end of the tripping pressure spring 18, and the tripping frame 16 is provided with a second projection matched with the other end of the tripping pressure spring 18; so that the other end of the second protruding tripping pressure spring 18 is used for fixing the tripping pressure spring 18, and the U-shaped rod 2 cannot be tripped at the clamping position of the tripping frame 16 and one end of the rotating wheel 15 by utilizing the compression resilience of the tripping pressure spring 18. One end of the tripping tension spring 4 is connected with the shell 42, and the other end of the tripping tension spring 4 is connected with the tripping frame 16.

When the tripping frame 16 drives the L-pole moving contact 21 to separate from the L-pole static contact 27 of the L-pole static contact 11; the N-pole moving contact 37 is separated from the N-pole stationary contact 39 of the N-pole stationary contact 44, the trip compression spring 18 is in a micro-compression state, and the trip tension spring 4 is in a micro-tension state; the moving contact pressure spring 19 is in a micro-compression state;

when the trip frame 16 drives the L-pole moving contact 21 to contact with the L-pole stationary contact 27 of the L-pole stationary contact 11; the N-pole moving contact 37 is in contact with the N-pole stationary contact 39 of the N-pole stationary contact 44, the trip compression spring 18 is in a deep compression state, and the trip tension spring 4 is in a deep tension state; the moving contact pressure spring 19 is in a deep compression state.

(1) The handle 1 utilizes the torsion of the handle torsion spring 3 to drive the rotating wheel 15 and the tripping frame 16 to act through the U-shaped rod 2, so that the L-pole moving contact 21 and the N-pole moving contact 37 are separated.

(2) When a short circuit occurs in the circuit, a short circuit current is input to the coil 51 and the static iron core 47, the moving iron core 7 is attracted to act by using an electromagnetic effect, the moving iron core 7 pushes the ejector rod 10 to act, the ejector rod 10 can pass through a hole in the static iron core 47 to push the tripping frame 16, and the ejector rod 10 pushes the tripping frame 16 to act, so that the L-pole moving contact 21 and the N-pole moving contact 37 are separated.

(3) When overload exists in the circuit, the bimetallic strip 28 is heated to cause the bimetallic strip 28 to deform, the buckled bimetallic strip 28 pulls the tripping pull rod 24, and the tripping frame 16 is pulled by the tripping pull rod 24; the trip frame 16 operates to separate the L-pole moving contact 21 and the N-pole moving contact 37.

(4) When leakage current exists in the circuit, the magnetic ring 43 induces the leakage current and then inputs the leakage current to the circuit board 41 for amplification, the leakage coil 52 is connected with the output end of the circuit board 41, the output end of the circuit board 41 is connected with the leakage coil 52 and the static iron core 47, the leakage coil 52 and the static iron core 47 generate a magnetoelectric effect after being electrified, the movable iron core 7 is attracted to act, the movable iron core 7 pushes the ejector rod 10 to act, the ejector rod 10 can penetrate through a hole in the static iron core 47 to push the trip frame 16, and the ejector rod 10 pushes the trip frame 16 to act, so that the L-pole moving contact 21 and the N-pole moving contact 37 are separated.

When any one of the above conditions (1) to (4) occurs, the L-pole moving contact 21 and the L-pole fixed contact 11 can be rapidly separated by using the compression elastic forces of the moving contact compression spring 19, the trip compression spring 18 and the trip compression spring 18, and the tensile force of the trip tension spring 4; the N pole moving contact 37 is rapidly separated from the N pole fixed contact 44; the secondary arcing phenomenon is prevented, and the safety and the reliability of the contact are ensured.

When the L-pole moving contact 21 is separated from the L-pole fixed contact 11; after the N-pole moving contact 37 is separated from the N-pole fixed contact 44; in order to restart the circuit breaker, the handle 1 drives the rotating wheel 15 and the tripping frame 16 to act through the U-shaped rod 2 by using the torsion of the handle torsion spring 3, so that the L-pole moving contact 21 is contacted with the L-pole fixed contact 11; the N-pole moving contact 37 is in contact with the N-pole fixed contact 44, and the tripping pressure spring 18 and the moving contact pressure spring 19 in a compressed state generate elastic force, so that the L-pole moving contact 21 is in full and reliable contact with the L-pole fixed contact 11, and the N-pole moving contact 37 is in full and reliable contact with the N-pole fixed contact 44.

Example 3

With reference to fig. 1-2, the present embodiment provides an electrical leakage breaker, which is improved based on the technical solution of embodiment 1 or 2 as follows: a partition plate 45 for isolating the wiring board 41 is also included.

The partition board 45 is used for isolating the circuit board 41, the circuit board 41 is used for amplifying leakage current, and is also used for setting a leakage current safety threshold, that is, when the leakage current is lower than the leakage current safety threshold, the leakage current is within a safety range, and the circuit breaker does not perform leakage protection action; when the leakage current is higher than the leakage current safety threshold value, the leakage current exceeds the safety range, the circuit board 41 amplifies the leakage current and transmits the amplified leakage current to the leakage coil 52, the leakage coil 52 is electrified to generate a magnetoelectric effect to attract the movable iron core 7 to act, the movable iron core 7 pushes the ejector rod 10 to act, the ejector rod 10 can pass through a hole in the static iron core 47 to push the trip frame 16, and the ejector rod 10 pushes the trip frame 16 to act, so that the L-pole moving contact 21 and the N-pole moving contact 37 are separated; and performing leakage protection.

The circuit board 41 belongs to a weak current circuit board, and the circuit board 41 is prevented from being damaged by electric arcs generated when contacts are separated or heat generated when a circuit is overloaded by the isolation action of the partition plate 45.

Example 4

With reference to fig. 1-2, the present embodiment provides an electrical leakage breaker, which is improved based on any one of the technical solutions of embodiments 1-3 as follows: the N-pole wire inlet and outlet column is located on the other side of the housing 42, the N-pole wire inlet and outlet column includes an N-pole wire outlet column 2504 and a wiring board four 46 connected with the N-pole wire outlet column 2504, and the N-pole wire outlet column 2504 and the wiring board four 46 are both located on an edge of one end of the other side of the housing 42; the N-pole incoming and outgoing wire column further comprises an N-pole incoming wire column 2503 and a third wiring board 40 connected with the N-pole incoming wire column 2503, and the N-pole incoming wire column 2503 and the third wiring board 40 are located at the edge of the other end of the other side of the shell 42.

Through the arrangement, the N-pole incoming line column 2503 and the N-pole outgoing line column 2504 are respectively arranged at two ends of the shell 42, one end of the breaker is an incoming line end, the other end of the breaker is an outgoing line end, and safety and reliability of a line are guaranteed.

Example 5

With reference to fig. 1-2, the present embodiment provides an electrical leakage breaker, which is improved based on any one of the technical solutions of embodiments 1-4 as follows: the thermal trip mechanism further comprises a bimetallic support 31 for supporting the bimetallic strip 28, wherein the bimetallic support 31 is connected with the bimetallic strip 28 and is used for supporting the bimetallic strip 28; the other end of the bimetal 28 is adjacent to the adjusting screw 30.

The gap between one end of the bimetallic strip 28 and the end plate at one end of the trip pull rod 24 can be adjusted through the adjusting screw 30, and under the condition that the bimetallic strip 28 is deformed under the same thermal effect, the size of the gap is different, and the time for the bimetallic strip 28 to pull the trip pull rod 24 to act is different; by changing the size of the gap, the circuit breaker can be quickly disconnected when the circuit is overloaded.

Example 6

With reference to fig. 1-2, the present embodiment provides an electrical leakage breaker, which is improved based on any one of the technical solutions of embodiments 1-5 as follows: the leakage protection circuit breaker is characterized by further comprising a testing mechanism, wherein the testing mechanism is used for detecting whether the leakage protection function is effective or not, namely the testing mechanism is used for simulating to generate leakage current and judging whether the leakage circuit breaker can be normally operated to be disconnected or not after sensing the leakage current, and the leakage current is simulated through the testing mechanism at intervals and is used for detecting whether the leakage protection function of the leakage circuit breaker is effective or not. The testing mechanism comprises a testing button 14, a testing button pressure spring 20, a button rib piece I22 and a button rib piece II 36 which are connected with the L pole, and a testing button torsion spring 35 which is contacted with the testing button pressure spring 20; the test button torsion spring 35 is fixed on the shell 42, the test button torsion spring 35 is connected with the N pole, one end of the test button torsion spring 35 is located at the bottom of the test button 14, and one end of the test button compression spring 20 is located below the bottom of the test button 14; the other end of the test button pressure spring 20 is provided with a button rib piece I22 and a button rib piece II 36.

The first button rib 22 is located on one side of the shell 42 where the L-pole wire inlet/outlet column is located, and the second button rib 36 is located on one side of the shell 42 where the N-pole wire inlet/outlet column is located.

The test button 14 is pressed, one end of a test button torsion spring 35 is pressed down by the test button 14 to be in contact with a test button compression spring 20, the test button compression spring 20 is in contact with a button rib piece I22 and a button rib piece II 36 to conduct electricity, leakage current is generated, a lead of the test mechanism penetrates through a magnetic ring 43, and the lead is input into a circuit board 41 after the magnetic ring 43 senses the leakage current, so that the magnetic tripping mechanism acts, and the movable contact and the fixed contact are separated.

Example 7

With reference to fig. 1-2, the present embodiment provides an electrical leakage breaker, which is improved based on any one of the technical solutions of embodiments 1-6 as follows: the L-pole wire inlet and outlet column is positioned on one side of the shell 42 and comprises an L-pole wire inlet column 2501 positioned on the middle seat 34 and a first wiring board 26 connected with the L-pole wire inlet column 25, and the middle seat 34 and the first wiring board 26 are both positioned on the edge of one end of one side of the shell 42; the L pole inlet and outlet wire column further comprises an L pole outlet column 2502 and a second wiring board 9 connected with the L pole outlet column 2502, and the L pole outlet column 2502 and the second wiring board 9 are located at the edge of the other end of one side of the shell 42.

Through the arrangement, the L-pole incoming line column 2501 and the L-pole outgoing line column 2502 are respectively arranged at two ends of the shell 42, one end of the breaker is an incoming line end, the other end of the breaker is an outgoing line end, and safety and reliability of a line are guaranteed. When the electric leakage circuit breaker is connected into the circuit, the inlet and outlet wires of the L-pole lead and the inlet and outlet wires of the N-pole lead are connected to the electric leakage circuit breaker in an inserting mode.

Example 8

With reference to fig. 1-2, the present embodiment provides an electrical leakage breaker, which is improved based on any one of the technical solutions of embodiments 1-7 as follows: the adjusting screw 30 comprises an adjusting bolt 301 and an adjusting screw 302, one end of the bimetallic strip 28, which is far away from the first copper wire 23, is adjacent to the adjusting screw 302 which penetrates through the adjusting bolt 301, and the adjusting bolt 301 is fixed on the shell 42.

The gap between one end of the bimetal 28 and the end plate at one end of the trip rod 24 can be adjusted by the adjusting screw 30, that is, the adjusting screw 302 is screwed, the adjusting screw 302 contacts with the other end of the bimetal 28 to continuously press the other end of the bimetal 28, one end of the bimetal 28 moves to the end plate at one end of the trip rod 24, and the gap between one end of the bimetal 28 and the end plate at one end of the trip rod 24 is reduced. When the circuit is overloaded, the bimetallic strip 28 is heated to deform and bend, one end of the bimetallic strip 28 moves towards the end plate at one end of the tripping pull rod 24, and when the bimetallic strip 28 deforms under the same thermal effect, the clearance is reduced, the time for the bimetallic strip 28 to pull the tripping pull rod 24 to act is advanced, the separation time of the moving contact and the static contact is advanced, and the action time of the circuit breaker is advanced when the circuit is overloaded; the size of the gap is changed, the separation time of the change and static contact can be changed, and the circuit breaker can be quickly disconnected when the line is overloaded. Referring to fig. 3, which is a schematic structural view of the thermal trip mechanism, the end plate at one end of the trip rod 24 is not shown in the figure, and the bimetallic strip 28 is connected with the first connecting plate 26 through the connecting piece 261.

Example 9

With reference to fig. 1-2, the present embodiment provides an electrical leakage breaker, which is improved based on any one of the technical solutions of embodiments 1-8 as follows: the arc extinguishing chamber 13 and the arc extinguishing rib 131 are respectively arranged at two sides of the shell 42, and the arc extinguishing rib 131 is connected with the shell 42; and a fixing plate 17 is arranged on the shell 42 at the L-pole static contact 11, and the fixing plate 17 is connected with the arc extinguish chamber 13.

The fixed plate 17 is made of dupont 101, and after the electric arc ignites the fixed plate 17, the dupont 101 burns to generate gas which is introduced into the arc extinguish chamber 13, so that the effect of extinguishing the electric arc is achieved.

The arc extinguishing system further comprises a first arc striking plate 32 and a second arc striking plate 38, one end of the first arc striking plate 32 is connected with the arc extinguishing chamber 13, and the other end of the first arc striking plate 32 is fixedly connected with the bimetal supporting piece 31; one end of the second arc striking piece 38 is positioned at the N-pole moving contact 37, the other end of the second arc striking piece 38 is positioned at the arc extinguishing rib 131, and the arc extinguishing rib 131 divides the arc generated by the N pole into two parts, so that the energy of the arc is decomposed, and the harm generated by the arc is reduced; the arc extinguishing effect is achieved through the arc extinguishing chamber 13 and the arc extinguishing rib 131.

Example 10

With reference to fig. 1-2, the present embodiment provides an electrical leakage breaker, which is improved based on any one of the technical solutions of embodiments 1-9 as follows: the mounting clamp 12 is used for fixedly mounting a shell 42, the operating mechanism and the magnetic tripping mechanism penetrate through two sides of the shell 42, and one side of the shell 42 is also provided with components connected or related to an L-pole lead, such as an arc extinguishing chamber 13, a first arc striking plate 32, a fixing plate 17 and the like; and the other side of the shell 42 is also provided with a second arc striking plate 38, an arc extinguishing rib 131, a magnetic ring 43 and a part connected or related to the N-pole lead of the circuit board 41.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. A leakage circuit breaker is characterized by comprising a shell, wherein an L-pole inlet and outlet wire column, an N-pole inlet and outlet wire column, a magnetic tripping mechanism, an operating mechanism, a thermal tripping mechanism and an arc extinguishing system are arranged on the shell; wherein,

the operating mechanism is connected with one end of the tripping frame; the other end of the tripping frame is connected with the L-pole moving contact and the N-pole moving contact; the rotating wheel is positioned below the tripping frame, the rotating wheel is connected with one end of a moving contact pressure spring, and one side of the other end of the moving contact pressure spring is connected with one end of an L-pole moving contact; the other side of the other end of the moving contact pressure spring is connected with one end of an N-pole moving contact; the other end of the L-pole moving contact is in separable contact with the L-pole static contact; the other end of the N-pole moving contact is in separable contact with the N-pole static contact;

the arc extinguishing system comprises an arc extinguishing chamber and an arc extinguishing rib, wherein the arc extinguishing chamber is used for eliminating electric arcs generated at the separation position of the L-pole static contact and the L-pole moving contact; the arc extinguishing rib is used for eliminating electric arcs generated at the separation position of the N-pole static contact and the N-pole moving contact;

the magnetic tripping mechanism comprises a coil connected with an L-pole fixed contact, a movable iron core, a coil framework positioned in the coil and a leakage coil positioned in the coil framework, wherein the movable iron core, a coil pressure spring and an ejector rod are sequentially arranged in the leakage coil from one end of the leakage coil, the other end of the leakage coil is provided with a fixed iron core, and a hole through which the ejector rod can pass is formed in the fixed iron core; the leakage coil is connected with the output end of the circuit board, and the input end of the circuit board is connected with the output end of the magnetic ring; the L-pole lead, the N-pole lead and the lead of the testing mechanism all penetrate through the magnetic ring;

the thermal tripping mechanism comprises a bimetallic strip, one end of the bimetallic strip is connected with the L-pole moving contact through a first copper conductor, the other end of the bimetallic strip is connected with the L-pole conductor through a second copper conductor, and one end of the bimetallic strip is adjacent to an end plate at one end of the tripping pull rod and is provided with a gap; the other end of the tripping pull rod is connected with the tripping frame.

2. A residual current circuit breaker according to claim 1, characterized in that said operating mechanism comprises a handle, and a trip frame and a wheel which are detachably engaged with each other, a handle torsion spring, a trip tension spring, a trip compression spring and a U-shaped rod; one end of the handle torsion spring is fixedly connected with the shell, the handle torsion spring body is assembled in a cylindrical hole in the center of the circular part of the handle, and the other end of the handle torsion spring is fixed on the surface of the circular part of the handle;

one end of the U-shaped rod is inserted into the circular part of the handle, the other end of the U-shaped rod is clamped with the tripping frame and one end of the rotating wheel, the other end of the rotating wheel is connected with one end of the tripping pressure spring, and the other end of the tripping pressure spring is connected with the tripping frame.

3. A residual current circuit breaker according to claim 1, characterized in that it further comprises a partition for isolating said circuit board.

4. A residual current circuit breaker according to claim 1, wherein the N-pole wire inlet/outlet column is located at the other side of the housing, the N-pole wire inlet/outlet column includes an N-pole wire outlet column, and a terminal plate four connected to the N-pole wire outlet column, and the N-pole wire outlet column and the terminal plate four are both located at one end edge of the other side of the housing;

the N-pole wire inlet and outlet column further comprises an N-pole wire inlet column and a third wiring board connected with the N-pole wire inlet column, and the N-pole wire inlet column and the third wiring board are both located at the edge of the other end of the other side of the shell.

5. A residual current circuit breaker as claimed in claim 1, characterized in that said thermal trip mechanism further comprises a bimetal support for supporting a bimetal, said bimetal being connected to said bimetal support; the other end of the bimetallic strip is adjacent to the adjusting screw.

6. The residual current circuit breaker according to claim 1, further comprising a testing mechanism, wherein the testing mechanism comprises a testing button, a testing button compression spring, a first button rib and a second button rib connected with the L pole, and a testing button torsion spring in contact with the testing button compression spring; the testing button torsional spring is fixed on the shell and connected with the N pole, one end of the testing button torsional spring is positioned at the bottom of the testing button, and one end of the testing button compressed spring is positioned below the bottom of the testing button; and a first button rib sheet and a second button rib sheet are arranged at the other end of the test button pressure spring.

7. An earth leakage breaker as claimed in claim 1, wherein said L-pole incoming and outgoing line post is located at one side of said housing, said L-pole incoming and outgoing line post comprises an L-pole incoming and outgoing line post located on a middle seat, and a first wiring board connected with the L-pole incoming and outgoing line post, said middle seat and said first wiring board are both located at one end edge of one side of said housing;

the L pole inlet and outlet wire column further comprises an L pole outlet wire column and a second wiring board connected with the L pole outlet wire column, and the L pole outlet wire column and the first wiring board are both located at the edge of the other end of one side of the shell.

8. A residual current circuit breaker according to claim 5, characterized in that the adjusting screw comprises an adjusting bolt and an adjusting screw, the end of the bimetal, which is far away from the first copper conductor, is adjacent to the adjusting screw passing through the adjusting bolt, and the adjusting bolt is fixed on the shell.

9. A residual current circuit breaker according to any one of claims 1-8, characterized in that said arc extinguishing chamber and said arc extinguishing rib are arranged on either side of the housing, respectively, said arc extinguishing rib being connected to the housing; and a fixing plate is arranged on the shell at the position of the L-pole static contact and is connected with the arc extinguish chamber.

10. A residual current circuit breaker as claimed in claim 2, characterized in that the other end of the turning wheel is provided with a first projection matched with one end of a tripping compression spring, and the tripping frame is provided with a second projection matched with the other end of the tripping compression spring.