CN116364487A - Leakage circuit breaker - Google Patents

Abstract

The invention discloses an electric leakage breaker, which relates to the technical field of electrical equipment and comprises a cuboid shell and a circuit board arranged in the shell, wherein the circuit board divides the space in the shell into a protection electrode cavity and a neutral electrode cavity which are arranged in parallel along the height direction of the shell, a first operating mechanism, a first moving contact, a first fixed contact, a short-circuit release and a mutual inductor are sequentially arranged in the protection electrode cavity along the length direction, a second operating mechanism, a second moving contact, a second fixed contact and an electric leakage release are sequentially arranged in the neutral electrode cavity along the length direction, the second operating mechanism corresponds to the first operating mechanism in position, an opening is formed in the circuit board at the corresponding position of the mutual inductor, the first fixed contact and the second fixed contact are respectively arranged through the mutual inductor, and the mutual inductor is electrically connected with the electric leakage release. The leakage circuit breaker provided by the invention has a compact internal structure, and can reduce the whole volume of the leakage circuit breaker.

Description

Leakage circuit breaker

Technical Field

The application relates to the technical field of electrical equipment, in particular to an electric leakage breaker.

Background

The leakage breaker (Residual current operated circuit-breaker) is a switch capable of automatically acting when the leakage current in the circuit exceeds a preset value, and is used for backup protection for preventing faults such as personal electric shock, fire, line aging and the like. The leakage circuit breaker is divided into an electromagnetic type and an electronic type, the zero sequence transformer is arranged in the circuit breaker, the current of the protection electrode and the neutral electrode simultaneously passes through the zero sequence transformer, the purpose of leakage protection is achieved by detecting unbalanced current in the zero sequence transformer, when electric shock or electric leakage fault occurs in a circuit, the phasor sum of the current passing through the zero sequence current transformer is not zero, so that leakage current is generated, and the electromagnetic type leakage circuit breaker controls the circuit breaker to break according to the leakage current, so that the purpose of automatically cutting off a power supply is achieved; the electronic leakage circuit breaker controls the breaker to break the gate through the controller according to the leakage current signal, so as to achieve the purpose of automatically cutting off the power supply.

The existing residual current circuit breaker is limited by an internal mechanism, the shell is usually a convex-shaped shell, the wiring terminal is a screw wiring, the height of the convex-shaped shell is large, and the movable space is large when the handle is operated, so that the whole size of the circuit breaker is overlarge, and the size of the distribution box is overlarge.

Disclosure of Invention

An object of the present application is to provide a leakage breaker, internal structure is compact, can reduce the whole volume of leakage breaker.

The embodiment of the application provides an electric leakage breaker, including the casing of cuboid and set up the circuit board in the casing, the circuit board cuts apart the space in with the casing into protection electrode cavity and the neutral electrode cavity that set up side by side along casing direction of height, protection electrode cavity length direction sets gradually first operating device, first moving contact, first stationary contact, short-circuit release and mutual-inductor, first operating device is driven and is driven first moving contact and first stationary contact combined floodgate or break, neutral electrode cavity length direction sets gradually second operating device, the second moving contact, second stationary contact and electric leakage release, the second operating device is driven and is driven second moving contact and second stationary contact combined floodgate or break, second operating device corresponds with first operating device position, the circuit board is provided with the opening in mutual-inductor corresponding position, first stationary contact and second stationary contact pass the mutual-inductor setting respectively, the mutual-inductor is connected with the electric leakage release electricity.

As an embodiment, the guard pole chamber is further provided with a guard pole arc-extinguishing chamber, the neutral pole chamber is further provided with a neutral pole arc-extinguishing chamber, and the neutral pole arc-extinguishing chamber corresponds to the position of the guard pole arc-extinguishing chamber.

As an embodiment, the neutral pole arc extinguishing chamber is identical to the protective arc extinguishing chamber in structure.

As an implementation manner, the residual current circuit breaker further comprises an overload protector arranged between the shell and the first operating mechanism, wherein the overload protector is connected with the first moving contact and driven to drive the first operating mechanism to break.

As an implementation manner, the overload protector comprises a bimetallic strip, one end of the bimetallic strip is fixedly connected with the shell, and the other end of the bimetallic strip is heated to bend towards the first operating mechanism so as to push the first operating mechanism to break the brake.

As an embodiment, a partition plate is provided between the circuit board and the first operating mechanism and between the circuit board and the second operating mechanism.

As an implementation manner, the neutral pole chamber is further provided with a neutral pole input end and a neutral pole output end which are positioned at two ends of the neutral pole arc extinguishing chamber, and the protection pole chamber is further provided with a protection pole input end and a protection pole output end which are positioned at two ends of the protection pole arc extinguishing chamber.

As one embodiment, the first operating mechanism includes a first handle, the second operating mechanism includes a second handle, the first handle and the second handle are located at one side of the housing in the width direction, and the first handle and the second handle are disposed in linkage.

As an embodiment, the first handle and the second handle are both boat-shaped handles.

As an implementation mode, the first operating mechanism further comprises a jump buckle part and a lock buckle part, the lock buckle part is in butt joint with the jump buckle part, one end of the lock buckle part is provided with a short circuit boss, and the short circuit release drives the short circuit boss to move so that the first operating mechanism is opened.

As an implementation mode, a test button is further arranged on one side of the second handle on the shell, an elastic piece is further arranged in the shell corresponding to the test button, and one end of the elastic piece is contacted with the second movable contact in a closed state by pressing the test button.

As an implementation mode, an overload boss is further arranged on the locking piece of the first operating mechanism, and the other end of the bimetallic strip is heated to bend to drive the overload boss to move so as to enable the first operating mechanism to break.

The beneficial effects of the embodiment of the application include:

the invention provides an electric leakage breaker, which comprises a cuboid shell and a circuit board arranged in the shell, wherein the circuit board divides the space in the shell into a protection electrode cavity and a neutral electrode cavity which are arranged in parallel along the height direction of the shell, the shell is arranged into the cuboid, the neutral electrode cavity and the protection electrode cavity are arranged in parallel along the height direction, the width direction dimension of the electric leakage breaker is effectively reduced, a first operating mechanism, a first moving contact, a first static contact, a short-circuit release and a mutual inductor are sequentially arranged in the length direction of the protection electrode cavity, the first operating mechanism is driven to drive the first moving contact to close or open the first static contact, the neutral electrode cavity is sequentially provided with a second operating mechanism, a second moving contact, a second static contact and the electric leakage release, the second operating mechanism is driven to drive the second moving contact to close or open the second static contact, the second operating mechanism corresponds to the first operating mechanism, the circuit board is provided with an opening at the corresponding position of the mutual inductor, the first static contact and the second static contact are respectively arranged in the length direction of the protection electrode cavity, the first moving contact and the second static contact are electrically connected with the release, and the electric leakage breaker is more compact in the whole size of each part of the protection electrode cavity.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of an electrical leakage breaker according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a leakage circuit breaker according to an embodiment of the present disclosure;

fig. 3 is a third schematic view of an electrical leakage breaker according to an embodiment of the present disclosure.

Icon: 100-leakage circuit breaker; 110-a housing; 111-circuit boards; 120-guard electrode chamber; 121-a first operating mechanism; 1211-a first handle; 1212-snap fastener; 1213-a catch piece; 1214-short circuit lands; 1215-overload ledges; 122-a first moving contact; 123-a first stationary contact; 124-short trip; 125-mutual inductor; 126-guard arc extinguishing chamber; 127-bimetallic strip; 128-guard input; 129-guard output; 130-neutral pole chamber; 131-a second operating mechanism; 1311-a second handle; 132-a second moving contact; 133-a second stationary contact; 134-leakage release; 135-neutral pole arc extinguishing chamber; 136-a separator; 137-neutral input; 138-neutral pole output; 140-test button; 141-elastic member.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. The terms "first," "second," "third," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate medium, and the specific meaning of the terms in this application will be understood by those skilled in the art in specific cases.

The electric leakage circuit breaker is usually arranged in the cabinet, the existing electric leakage circuit breaker is limited by the fact that an internal mechanism is a convex-shaped shell, the width of the convex-shaped shell is large, and the electric leakage circuit breaker is difficult to adapt to installation and use environments with requirements on the width size.

The invention provides an electric leakage breaker 100, as shown in fig. 1, 2 and 3, which comprises a cuboid shell 110 and a circuit board 111 arranged in the shell 110, wherein the circuit board 111 divides a space in the shell 110 into a protection electrode cavity 120 and a neutral electrode cavity 130 which are arranged in parallel along the height direction (such as the direction B in fig. 1) of the shell 110, a first operating mechanism 121, a first moving contact 122, a first fixed contact 123, a short-circuit release 124 and a mutual inductor 125 are sequentially arranged in the length direction (such as the direction A in fig. 1) of the protection electrode cavity 120, the first operating mechanism 121 drives the first moving contact 122 to be switched on or switched off with the first fixed contact 123, a second operating mechanism 131, a second moving contact 132, a second fixed contact 133 and an electric leakage release 134 are sequentially arranged in the length direction of the neutral electrode cavity 130, the second operating mechanism 131 drives the second moving contact 132 to be switched on or switched off with the second fixed contact 133, the second operating mechanism 131 corresponds to the position of the first operating mechanism 121, an opening is arranged in the position of the circuit board 111 corresponding to the mutual inductor 125, and the first moving contact 123 and the second moving contact 133 and the mutual inductor 125 pass through the mutual inductor 125 respectively.

The input of electric leakage circuit breaker 100 is connected with the power, and the output of electric leakage circuit breaker 100 is connected with the load, and when electric leakage circuit breaker 100 combined floodgate, first moving contact 122 is connected with first static contact 123 contact, and second moving contact 132 is connected with second static contact 133 contact, and the zero line and the live wire of power are connected with first moving contact 122 and second moving contact 132 respectively, and the zero line and the live wire of load are connected with first static contact 123 and second static contact 133 respectively for the power is the load power supply.

When the current passing through the leakage breaker 100 is greater than the set short-circuit action current, the short-circuit release 124 acts, wherein the short-circuit release 124 comprises a movable iron core, a static iron core and a push rod arranged in the static iron core, the movable iron core moves and pushes the push rod to stretch out, the push rod pushes the first operating mechanism 121, and the first operating mechanism 121 acts to drive the first moving contact 122 to move so that the first moving contact 122 is separated from the first static contact 123, so that the circuit is disconnected, and the short-circuit protection function of the leakage breaker 100 is realized.

When the residual current circuit breaker 100 works normally, the current on the zero line of the power supply is equal to the current value on the live line, and the directions are opposite, so that the current values of the first static contact 123 and the second static contact 133 are equal, the directions are opposite, and the sum of the currents passing through the mutual inductor 125 is zero. When electric leakage occurs in the circuit, the current flowing through the first fixed contact 123 and the current flowing through the second fixed contact 133 are different in value, the transformer 125 senses a leakage current signal and transmits the leakage current signal to the circuit board 111, the circuit board 111 controls the action of the leakage release 134 and pushes the second operating mechanism 131, and the second operating mechanism 131 acts to drive the second fixed contact 133 to be separated from the second moving contact 132, so that the circuit is disconnected, and the leakage protection function of the leakage breaker 100 is realized.

The first operating mechanism 121, the first moving contact 122, the first fixed contact 123, the short-circuit release 124 and the mutual inductor 125 are sequentially arranged in the guard electrode cavity 120, and the second operating mechanism 131, the second moving contact 132, the second fixed contact 133 and the electric leakage release 134 are sequentially arranged in the neutral electrode cavity 130, so that the electric leakage breaker 100 is compact in structure.

The leakage breaker 100 provided by the invention comprises a cuboid shell 110 and a circuit board 111 arranged in the shell 110, wherein the circuit board 111 divides the space in the shell 110 into a guard pole chamber 120 and a neutral pole chamber 130 which are arranged in parallel along the height direction of the shell 110, the shell 110 is arranged into a cuboid, the neutral pole chamber 130 and the guard pole chamber 120 are arranged in parallel along the height direction, the width dimension of the leakage breaker 100 is effectively reduced, and the positions of all parts in the neutral pole chamber 130 and the guard pole chamber 120 are arranged, so that all parts are more compact, and the whole volume of the leakage breaker 100 can be reduced.

Optionally, as shown in fig. 2 and 3, the guard electrode chamber 120 is further provided with a guard electrode arc-extinguishing chamber 126, the neutral electrode chamber 130 is further provided with a neutral electrode arc-extinguishing chamber 135, and the neutral electrode arc-extinguishing chamber 135 corresponds to the position of the guard electrode arc-extinguishing chamber 126.

When the first fixed contact 123 is separated from the first moving contact 122, an arc is generated when the second fixed contact 133 is separated from the second moving contact 132, an arc extinguishing chamber is required to be arranged to extinguish the generated arc, and a guard electrode arc extinguishing chamber 126 is arranged in the guard electrode chamber 120 to extinguish the arc generated when the first fixed contact 123 is separated from the first moving contact 122; a neutral pole arc extinguishing chamber 135 is provided in the neutral pole chamber 130 to extinguish an arc generated when the second stationary contact 133 and the second moving contact 132 are separated.

As shown in fig. 2, the guard arc extinguishing chamber 126 is disposed at one side of the short-circuit release 124 in the width direction, and as shown in fig. 3, the neutral arc extinguishing chamber 135 is disposed at one side of the leakage release 134 in the width direction, so that the overall structure of the leakage breaker 100 is compact.

It should be noted that, in order to guide the generated arc to the arc extinguishing chamber, a first striking plate is provided below the guard electrode arc extinguishing chamber 126, and one end of the first striking plate extends below the first moving contact 122; similarly, a second striking plate is disposed below the neutral pole arc extinguishing chamber 135, and one end of the second striking plate extends below the second moving contact 132.

In one implementation of the embodiment of the present invention, as shown in fig. 2 and 3, the neutral pole arc extinguishing chamber 135 has the same structure as the guard pole arc extinguishing chamber 126.

Compared with the scheme that the transformer 125 is arranged in the neutral pole chamber 130 to reduce the neutral pole arc extinguishing chamber 135 in the prior art, the invention arranges the transformer 125 at one end of the protection pole chamber 120, so that the neutral pole arc extinguishing chamber 135 and the protection pole arc extinguishing chamber 126 can be arranged in the same size and in the same internal structure, thereby improving the arc extinguishing capability of the neutral pole arc extinguishing chamber 135 and the breaking capability of the residual current circuit breaker 100.

Optionally, as shown in fig. 2, the residual current circuit breaker 100 further includes an overload protector disposed between the housing 110 and the first operating mechanism 121, where the overload protector is connected to the first moving contact 122 and is driven to drive the first operating mechanism 121 to open.

When the leakage breaker 100 is switched on, the first moving contact 122 is in contact with the first fixed contact 123, current flows through the first moving contact 122 and the first fixed contact 123, the overload protector is connected with the first moving contact 122, when the current in the first moving contact 122 exceeds the rated current, the current in the overload protector also exceeds the rated current, and when the current in the overload protector exceeds the rated current, the change occurs and the first operating mechanism 121 is driven to act, so that the first operating mechanism 121 is switched off.

The overload protector is arranged between the shell 110 and the first operating mechanism 121, so that the leakage breaker 100 can be automatically switched off when the current exceeds a certain value, overcurrent protection of a circuit is realized, and the overload protector is arranged between the shell 110 and the first operating mechanism 121, so that the structure in the leakage breaker 100 is compact while the overcurrent protection function is not influenced.

In one implementation manner of the embodiment of the present invention, as shown in fig. 2, the overload protector includes a bimetal 127, one end of the bimetal 127 is fixedly connected with the housing 110, and the other end is heated to be bent toward the first operating mechanism 121, so as to push the first operating mechanism 121 to open.

The bimetal 127 is a composite material composed of two or more metals or other materials with proper performances, when the current in the leakage breaker 100 exceeds the rated current, the current flowing through the bimetal 127 generates heat relatively large, when the heat accumulation on the bimetal 127 causes the temperature on the bimetal to exceed the preset temperature, the bimetal 127 exceeding the preset temperature bends due to the different thermal expansion coefficients of the elements in the bimetal 127, and the first operating mechanism 121 is pushed to open, so that the first fixed contact 123 is driven to be separated from the first moving contact 122, and the overload protection function of the circuit is realized.

One end of the bimetal 127 is fixed to the housing 110, and the other end is disposed as a driving end at a position close to the first operating mechanism 121, so that deformation of the driving end drives the first operating mechanism 121 to move. When the bimetal 127 is fixed to the housing 110, the bimetal 127 may be fixed to the housing 110 after being fixed to the first striking plate.

Optionally, as shown in fig. 3, a partition 136 is provided between the circuit board 111 and the second operating mechanism 131 and between the circuit board 111 and the first operating mechanism 121.

The circuit board 111 is used for controlling and transmitting signals, the current flowing through the inside is weak current, the second operating mechanism 131 is connected with the second moving contact 132, when the leakage breaker 100 is switched on, the second moving contact 132 contacts with the second static contact 133, the second moving contact 132 internally flows electric power, the strong current is strong, the voltage of the strong current is higher, the withstand voltage capability of the weak current is weaker, when the strong current is closer to the weak current, electric breakdown can be generated between the strong current and the weak current, the circuit board 111 is burnt out, in order to increase the withstand voltage capability between the strong current and the weak current, a partition 136 is arranged between the circuit board 111 and the second operating mechanism 131, and between the circuit board 111 and the first operating mechanism 121 for electrically isolating the strong current and the weak current, and in order to realize the electric isolation of the partition 136, the partition 136 needs to be made of insulating materials.

When the electric leakage breaker 100 is switched on, the first moving contact 122 contacts the first fixed contact 123, and strong electricity flows between the first moving contact 122 and the first fixed contact 123, so that the separator 136 extends to a position corresponding to the first fixed contact 123; similarly, the separator 136 disposed on the other side of the circuit board 111 also extends to a position corresponding to the second stationary contact 133.

In one implementation of the embodiment of the present invention, as shown in fig. 2 and 3, a neutral input end 137 and a neutral output end 138 are further disposed in the neutral chamber 130 and located at two ends of the neutral arc extinguishing chamber 135, and a guard input end 128 and a guard output end 129 are further disposed in the guard chamber 120 and located at two ends of the guard arc extinguishing chamber 126.

The neutral electrode input end 137 and the neutral electrode output end 138 are disposed at two ends of the neutral electrode arc extinguishing chamber 135, and the neutral electrode arc extinguishing chamber 135 is located at one end of the neutral electrode chamber 130 in the width direction, as shown in fig. 3, below the leakage release 134, so that the internal space of the neutral electrode chamber 130 can be fully utilized, the structure in the neutral electrode chamber 130 is compact, and the guard electrode input end 128 and the guard electrode output end 129 are disposed at two ends of the guard electrode arc extinguishing chamber 126, and the guard electrode arc extinguishing chamber 126 is located at one end of the guard electrode chamber 120 in the width direction, below the short-circuit release 124, so that the internal space of the guard electrode chamber 120 can be fully utilized, and the structure in the guard electrode chamber 120 is compact.

The guard pole input 128 and the neutral pole input 137 are used for external power supply, the guard pole output 129 and the neutral pole output 138 are used for connection with a load, the specific form of the input and the output is not particularly limited as long as the function of connecting the power supply or the load can be achieved, and the invention uses a plugboard with two elastic arms, the two elastic arms have elastic potential energy which are close to each other, and the wire is clamped after the wire is inserted due to the elastic potential energy.

It should be noted that, corresponding to the neutral pole input end 137 and the neutral pole output end 138, and the guard pole input end 128 and the guard pole output end 129, through holes are formed in the housing 110, so that the wires pass through the through holes to be connected with corresponding connection terminals.

Alternatively, as shown in fig. 2 and 3, the first operating mechanism 121 includes a first handle 1211, the second operating mechanism 131 includes a second handle 1311, the first handle 1211 and the second handle 1311 are located on one side of the housing 110 in the width direction, and the first handle 1211 is disposed in linkage with the second handle 1311.

The first and second handles 1211 and 1311 are disposed at one side of the housing 110 in the width direction, reducing the size of the handles in the width direction, thereby enabling the leakage breaker 100 to be adapted to an installation and use environment requiring a width size. When the residual current circuit breaker 100 is opened, the first fixed contact 123 and the first moving contact 122, and the second fixed contact 133 and the second moving contact 132 are required to be simultaneously opened, the first handle 1211 and the second handle 1311 are linked, and the circuit in the neutral pole chamber 130 and the circuit in the guard pole chamber 120 are synchronously operated.

In one implementation of an embodiment of the present invention, as shown in fig. 2 and 3, both the first handle 1211 and the second handle 1311 are boat-shaped handles. The ship-shaped handle occupies smaller volume, and is easier to operate as an operating end of an operator.

Optionally, as shown in fig. 2, the first operating mechanism 121 further includes a latch 1212 and a latch 1213, where the latch 1213 abuts against the latch 1212, one end of the latch 1213 is provided with a short-circuit boss 1214, and the short-circuit release 124 drives the short-circuit boss 1214 to move so that the first operating mechanism 121 is disconnected.

The short circuit boss 1214 is used for corresponding to the short circuit release 124, when the short circuit release 124 receives the short circuit signal to release, the short circuit release 124 pushes the locking piece 1213, so that the locking piece 1213 is separated from the locking piece 1212, and the first moving contact 122 is far away from the first fixed contact 123, so that the leakage breaker 100 is opened. The provision of the shorting boss 1214 makes it easier for the shorting release 124 to push the movement of the catch 1213.

In one implementation manner of the embodiment of the present invention, as shown in fig. 3, a test button 140 is further disposed on one side of the second handle 1311 on the housing 110, and an elastic member 141 is further disposed in the housing 110 corresponding to the test button 140, and the test button 140 is pressed to make one end of the elastic member 141 contact with the second moving contact 132 in the closed state.

In practical application, the electric leakage breaker 100 can be automatically disconnected to realize the protection load and the circuit function to test when the electric leakage is performed at intervals, the test button 140 is arranged on one side of the second handle 1311 on the shell 110, when the electric leakage breaker 100 is closed, the test button 140 is pressed to enable one end of the elastic piece 141 to be in contact with the second movable contact 132, and the other end of the elastic piece 141 is connected with the protection electrode output end 129, so that partial current does not pass through the transformer 125 to cause the current in the transformer 125 to be different from zero, and thus an electric leakage signal is sent. The test button 140 is pressed to artificially manufacture an electrical leakage signal to detect whether the electrical leakage protection function of the electrical leakage breaker 100 is normal, so that the electrical leakage breaker 100 can be automatically opened to realize the electrical leakage protection function when an electrical leakage phenomenon occurs in the circuit.

Optionally, as shown in fig. 2, an overload boss 1215 is further disposed on the latch member 1213 of the first operating mechanism 121, and the other end of the bimetal 127 is heated to bend to drive the overload boss 1215 to move so as to switch off the first operating mechanism 121.

The bimetal 127 heats and bends to push the first operating mechanism 121, the overload boss 1215 on the locking piece 1213 is used for contacting with the other end of the bimetal 127, and the overload boss 1215 is arranged to make the other end of the bimetal 127 easier to push the locking piece 1213 to move.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (12)

1. An earth leakage breaker (100) comprising a rectangular parallelepiped housing (110) and a circuit board (111) provided in the housing (110), wherein the circuit board (111) divides a space in the housing (110) into a guard electrode chamber (120) and a neutral electrode chamber (130) arranged in parallel in a height direction of the housing (110); the protection pole cavity (120) is sequentially provided with a first operating mechanism (121), a first moving contact (122), a first fixed contact (123), a short-circuit release (124) and a mutual inductor (125) in the length direction, wherein the first operating mechanism (121) is driven to drive the first moving contact (122) to be switched on or switched off with the first fixed contact (123); the neutral electrode cavity (130) is sequentially provided with a second operating mechanism (131), a second moving contact (132), a second fixed contact (133) and a leakage release (134), the second operating mechanism (131) is driven to drive the second moving contact (132) to be switched on or switched off with the second fixed contact (133), and the second operating mechanism (131) corresponds to the first operating mechanism (121) in position; the circuit board (111) is provided with the opening in mutual-inductor (125) corresponding position department, first static contact (123) with second static contact (133) are passed respectively mutual-inductor (125) sets up, mutual-inductor (125) with electric leakage release (134) are connected.

2. The residual-current circuit breaker (100) according to claim 1, characterized in that the guard pole chamber (120) is further provided with a guard pole arc chute (126), and the neutral pole chamber (130) is further provided with a neutral pole arc chute (135) corresponding to the position of the guard pole arc chute (126).

3. The leakage circuit breaker (100) of claim 2, wherein the guard pole arc chute (126) is structurally identical to the neutral pole arc chute (135).

4. The residual-current circuit breaker (100) according to claim 1, further comprising an overload protector arranged between the housing (110) and the first operating mechanism (121), the overload protector being connected to a first moving contact (122), the overload protector being driven to open the first operating mechanism (121).

5. The earth leakage breaker (100) of claim 4, wherein the overload protector includes a bimetal (127), one end of the bimetal (127) is fixed to the housing (110), and the other end is heated to be bent toward the first operating mechanism (121) to push the first operating mechanism (121) to be opened.

6. The residual-current circuit breaker (100) according to claim 1, characterized in that a spacer (136) is provided between the circuit board (111) and the first operating mechanism (121) and between the circuit board (111) and the second operating mechanism (131).

7. The residual-current circuit breaker (100) according to claim 2, characterized in that a neutral pole input (137) and a neutral pole output (138) are further arranged in the neutral pole chamber (130) at both ends of the neutral pole arc extinguishing chamber (135), and a guard pole input (128) and a guard pole output (129) are further arranged in the guard pole chamber (120) at both ends of the guard pole arc extinguishing chamber (126).

8. The earth leakage breaker (100) of claim 1, wherein the first operating mechanism (121) includes a first handle (1211), the second operating mechanism (131) includes a second handle (1311), the first handle (1211) and the second handle (1311) are located on one side in a width direction of the housing (110), and the first handle (1211) is provided in linkage with the second handle (1311).

9. The residual current circuit breaker (100) of claim 8, wherein the first handle (1211) and the second handle (1311) are both boat-type handles.

10. The residual-current circuit breaker (100) according to claim 1, wherein the first operating mechanism (121) further comprises a latch (1212) and a latch (1213), the latch (1213) is abutted against the latch (1212), a short-circuit boss (1214) is disposed at one end of the latch (1213), and the short-circuit release (124) drives the short-circuit boss (1214) to move so that the first operating mechanism (121) is opened.

11. The residual-current circuit breaker (100) according to claim 8, wherein a test button (140) is further provided on one side of the second handle (1311) on the housing (110), an elastic member (141) is further provided in the housing (110) corresponding to the test button (140), and the test button (140) is pressed such that one end of the elastic member (141) is in contact with the second movable contact (132) in the closed state.

12. The residual current circuit breaker (100) according to claim 5, wherein an overload boss (1215) is further provided on the latch member (1213) of the first operating mechanism (121), and the other end of the bimetal (127) is heated to bend to drive the overload boss (1215) to move so as to open the first operating mechanism (121).

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