CN216902750U

CN216902750U - Residual current circuit breaker

Info

Publication number: CN216902750U
Application number: CN202123339327.6U
Authority: CN
Inventors: 潘万军; 宋增强
Original assignee: Shanghai Liangxin Electrical Co Ltd
Current assignee: Shanghai Liangxin Electrical Co Ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-07-05
Anticipated expiration: 2031-12-27

Abstract

The utility model discloses an electric leakage circuit breaker, which relates to the technical field of electrical elements and comprises a shell, and a neutral pole and a protective pole which are arranged in the shell in parallel, wherein the protective pole comprises a first operating mechanism, a first moving contact, a first static contact and an electromagnetic release which are sequentially arranged, the first operating mechanism is driven to drive the first moving contact to be switched on or switched off with the first static contact, the neutral pole comprises a second operating mechanism, a second moving contact, a second static contact and a mutual inductor which are sequentially arranged, the first static contact and the second static contact penetrate through the mutual inductor, the second operating mechanism is coaxially linked with the first operating mechanism, the mutual inductor is connected with the electromagnetic release, and the electromagnetic release pushes the first operating mechanism to be switched off under the control of a short-circuit signal or an electric leakage signal. The electric leakage circuit breaker provided by the utility model can simplify the internal structure of the electric leakage circuit breaker, and further can reduce the volume of the electric leakage circuit breaker.

Description

Residual current circuit breaker

Technical Field

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

Background

A leakage current breaker (Residual current operated circuit-breaker) is a switch which can automatically act when the leakage current in a 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 residual current circuit breaker has the basic short-circuit protection function of circuit breaker, and the inside short-circuit release that sets up of circuit breaker, short-circuit release are provided with and predetermine the electric current, and when the electric current in the residual current circuit breaker exceeded when predetermineeing the electric current, the short-circuit release control circuit breaker separating brake to reach residual current circuit breaker's short-circuit protection function. The residual current circuit breaker also has a residual current protection function, the current of a protective pole and a neutral pole simultaneously passes through the zero sequence transformer by arranging the zero sequence transformer in the circuit breaker, the purpose of residual current protection is achieved by detecting unbalanced current in the zero sequence transformer, when an electric shock or a residual current fault occurs in a circuit, the current phasor passing through the zero sequence transformer is not zero, so that a residual current signal is generated, and the residual current release controls the circuit breaker to be opened according to the residual current signal, so that the residual current protection function of the circuit breaker is achieved.

Because the short-circuit protection function and the electric leakage protection function are controlled respectively, an electric leakage release device needs to be arranged on a neutral pole, and a short-circuit release device needs to be arranged on a protective pole, so that the internal structure of the electric leakage breaker is complex, and too much space is occupied.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide an earth leakage circuit breaker, can simplify earth leakage circuit breaker inner structure, can also reduce earth leakage circuit breaker's volume.

The embodiment of the application is realized as follows:

the utility model provides a leakage circuit breaker, including the casing and set up neutral pole and protective pole in the casing side by side, the protective pole is including the first operating device that sets gradually, first moving contact, first static contact and electromagnetism release, first operating device drives first moving contact and first static contact combined floodgate or separating brake, the neutral pole is including the second operating device, second moving contact, second static contact and the mutual-inductor that set gradually, first static contact and second static contact pass the mutual-inductor setting, second operating device and the coaxial linkage of first operating device, the mutual-inductor is connected with the electromagnetism release, the electromagnetism release promotes first operating device and separates the floodgate under short circuit signal or the control of electric leakage signal.

As an implementable mode, the protective pole further comprises a first handle in transmission connection with the first operating mechanism, the neutral pole further comprises a second handle in transmission connection with the second operating mechanism, and the first handle and the second handle are coaxially linked.

As one practical way, the electromagnetic release includes an earth leakage release and a short circuit release which are connected, wherein the short circuit release is located at a side close to the first operating mechanism.

As an implementable mode, the protection pole further comprises a protection pole arc extinguish chamber arranged on one side of the electromagnetic trip, and the neutral pole further comprises a neutral pole arc extinguish chamber arranged corresponding to the protection pole arc extinguish chamber.

As an implementable mode, a circuit board is arranged between the neutral pole and the protective pole, a state indicating mechanism is arranged on one side of the neutral pole of the circuit board and comprises a torsion spring and pins which are respectively contacted with two ends of the torsion spring, one end of the torsion spring is in transmission connection with a second handle of the neutral pole, and the second handle drives one end of the torsion spring to be contacted with or separated from the pins.

As a practical way, the residual current circuit breaker further comprises a signal port connected with the circuit board, and the signal port is used for transmitting signals with the outside.

As an implementable mode, the residual current circuit breaker further comprises an indicator light connected with the circuit board, and the indicator light indicates the state of the residual current circuit breaker according to the contact or separation of the pins and the second handle.

As an implementable mode, the residual current circuit breaker further comprises a thermal release arranged between the shell and the first operating mechanism, the thermal release is connected with the first moving contact, and the thermal release is driven to drive the first operating mechanism to open.

As an implementation manner, the thermal release includes a bimetal, one end of the bimetal is fixed to the housing, and the other end of the bimetal is heated to bend toward the first operating mechanism, so as to push the first operating mechanism to open the brake.

As an implementation manner, a test button is further disposed on one side of the second handle on the housing, an elastic member is further disposed in the housing corresponding to the test button, and the test button is pressed to push the elastic member, so that one end of the elastic member is connected to the second moving contact in a closed state.

The beneficial effects of the embodiment of the application include:

the utility model provides an electric leakage circuit breaker, which comprises a shell, and a neutral pole and a protective pole which are arranged in the shell in parallel, wherein the protective pole comprises a first operating mechanism, a first moving contact, a first fixed contact and an electromagnetic release which are arranged in sequence, the first operating mechanism drives the first moving contact to be switched on or switched off with the first fixed contact under driving, all parts of the protective pole are arranged in sequence, so that the internal structure of the protective pole is compact, the neutral pole comprises a second operating mechanism, a second moving contact, a second fixed contact and a mutual inductor which are arranged in sequence, the first fixed contact and the second fixed contact penetrate through the mutual inductor, all parts of the neutral pole are arranged in sequence, so that the internal structure of the neutral pole is compact, the second operating mechanism is coaxially linked with the first operating mechanism, the mutual inductor is connected with the electromagnetic release, the electromagnetic release pushes the first operating mechanism to be switched off under the control of a short circuit signal or an electric leakage signal, two kinds of signals of same electromagnetism release perception, make electric leakage circuit breaker inner structure simple, second operating device sets up with first operating device linkage, make and drive the separating brake of second operating device when first operating device separating brake, thereby make first operating device and second operating device simultaneously separating brake when electric leakage signal or short circuit signal, realize electric leakage circuit breaker's protect function, and the setting of protection utmost point and neutral utmost point inside, make electric leakage circuit breaker inner structure simplify, thereby reduce electric leakage circuit breaker's volume.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

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

fig. 2 is a second schematic structural diagram of an electrical leakage breaker according to an embodiment of the present disclosure;

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

fig. 4 is a fourth schematic structural diagram of an electrical leakage breaker according to an embodiment of the present disclosure;

fig. 5 is a fifth schematic structural view of an electrical leakage breaker according to an embodiment of the present disclosure;

fig. 6 is a sixth schematic structural view of an electrical leakage breaker according to an embodiment of the present application.

Icon: 100-earth leakage circuit breaker; 110-a guard electrode; 111-a first operating mechanism; 112-a first movable contact; 113-a first stationary contact; 114-an electromagnetic release; 1141-short circuit release; 1142-leakage release; 115-thermal trip; 116-a guard pole arc chute; 117-a first handle; 120-neutral pole; 121-a second operating mechanism; 122-a second movable contact; 123-a second fixed contact; 124-neutral arc extinguishing chamber; 125-mutual inductor; 126-a second handle; 130-a circuit board; 131-a torsion spring; 132-stitch; 133-signal port; 134-indicator light; 141-test button; 142-an elastic member.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may for example be fixed or removable or integrally connected. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The residual current circuit breaker sets up in the rack usually, and current residual current circuit breaker is limited to inside mechanism and is the convex font casing usually, and the width of convex font casing is great, is difficult to adapt to the installation service environment that has the requirement to the width size.

The utility model provides an electric leakage circuit breaker 100, as shown in fig. 1, 2 and 4, which includes a housing, and a neutral pole 120 and a protection pole 110 that are arranged in parallel in the housing, where the protection pole 110 includes a first operating mechanism 111, a first moving contact 112, a first fixed contact 113 and an electromagnetic trip 114 that are arranged in sequence, the first operating mechanism 111 is driven to drive the first moving contact 112 and the first fixed contact 113 to close or open, the neutral pole 120 includes a second operating mechanism 121, a second moving contact 122, a second fixed contact 123 and a mutual inductor 125 that are arranged in sequence, the first fixed contact 113 and the second fixed contact 123 pass through the mutual inductor 125, as shown in fig. 3, the second operating mechanism 121 is coaxially linked with the first operating mechanism 111, the mutual inductor 125 is connected with the electromagnetic trip 114, and the electromagnetic trip 114 pushes the first operating mechanism 111 to open under the control of a short circuit signal or an electric leakage signal.

The residual current circuit breaker 100 is connected between a power supply and a load and used for closing or breaking the connection between the power supply and the load, the input end of the residual current circuit breaker 100 is connected with the power supply, the output end of the residual current circuit breaker 100 is connected with the load, the L pole of the power supply is connected with the first moving contact 112, the N pole of the power supply is connected with the second moving contact 122, the L pole of the load is connected with the first fixed contact 113, the N pole of the load is connected with the second fixed contact 123, when the residual current circuit breaker 100 is switched on, the first moving contact 112 is connected with the first fixed contact 113, and the second moving contact 122 is connected with the second fixed contact 123, so that the power supply supplies power for the load.

As shown in fig. 2 and 4, in order to facilitate the connection between the residual current circuit breaker 100 and the power supply and the load, an output end of the protection electrode 110 and an input end of the protection electrode 110 are disposed on the housing corresponding to the first fixed contact 113 and the first movable contact 112, an input end of the neutral electrode 120 is disposed in parallel with the input end of the protection electrode 110, and an output end of the neutral electrode 120 is disposed in parallel with the output end of the protection electrode 110.

When the current passing through the residual current circuit breaker 100 is greater than the preset short-circuit action current, the electromagnetic release 114 acts according to the short-circuit signal and pushes the first operating mechanism 111 to open, and the first operating mechanism 111 acts to drive the first moving contact 112 to move so as to separate the first moving contact 112 from the first fixed contact 113, thereby disconnecting the circuit and realizing the short-circuit protection function of the residual current circuit breaker 100.

When the residual current circuit breaker 100 is switched on and normally works, the current on the N pole of the power supply is equal to the current on the L pole in value and opposite in direction, so that the currents on first stationary contact 113 and second stationary contact 123 are equal in magnitude and opposite in direction, the sum of the currents through transformer 125 is zero, when the circuit has an electric leakage, the current flowing through the first stationary contact 113 and the current flowing through the second stationary contact 123 have different values, the transformer 125 senses the electric leakage signal, therefore, the electromagnetic release 114 is controlled to act, and the first operating mechanism 111 is pushed to be opened, the first operating mechanism 111 and the second operating mechanism 121 are arranged in a linkage manner, the first operating mechanism 111 drives the first moving contact 112 to move so that the first moving contact 112 is separated from the first fixed contact 113, the second operating mechanism 121 drives the second moving contact 122 to move so that the second moving contact 122 is separated from the second fixed contact 123, and therefore the circuit is disconnected, and the leakage protection function of the leakage breaker 100 is achieved.

The utility model integrates the leakage tripping function and the short circuit tripping function into the electromagnetic tripping device 114, reduces the space occupied by the electromagnetic tripping device 114, and has compact layout, thereby reducing the volume of the leakage breaker 100.

The utility model provides a residual current circuit breaker 100, which comprises a shell, a neutral pole 120 and a protective pole 110, wherein the neutral pole 120 and the protective pole 110 are arranged in parallel in the shell, the protective pole 110 comprises a first operating mechanism 111, a first moving contact 112, a first fixed contact 113 and an electromagnetic trip 114 which are sequentially arranged, the first operating mechanism 111 is driven to drive the first moving contact 112 to be switched on or switched off with the first fixed contact 113, all parts of the protective pole 110 are sequentially arranged, so that the internal structure of the protective pole 110 is compact, the neutral pole 120 comprises a second operating mechanism 121, a second moving contact 122, a second fixed contact 123 and a mutual inductor 125 which are sequentially arranged, the first fixed contact 113 and the second fixed contact 123 are arranged by penetrating through the mutual inductor 125, all parts of the neutral pole 120 are sequentially arranged, so that the internal structure of the neutral pole 120 is compact, the second operating mechanism 121 is coaxially linked with the first operating mechanism 111, and the mutual inductor 125 is connected with the electromagnetic trip 114, electromagnetic trip 114 promotes first operating device 111 and opens the floodgate under short-circuit signal or the control of electric leakage signal, same electromagnetic trip 114 perception two kinds of signals, make electric leakage circuit breaker 100 inner structure simple, second operating device 121 sets up with the linkage of first operating device 111, make drive second operating device 121 and open the floodgate when first operating device 111 opens the floodgate, thereby make first operating device 111 and second operating device 121 open the floodgate simultaneously when electric leakage signal or short-circuit signal, realize electric leakage circuit breaker 100's protect function, and the inside setting of protection utmost point 110 and neutral utmost point 120, make electric leakage circuit breaker 100 inner structure simplify, thereby reduce electric leakage circuit breaker 100's volume.

Optionally, as shown in fig. 2, 3 and 4, the protective pole 110 further includes a first handle 117 in transmission connection with the first operating mechanism 111, the neutral pole 120 further includes a second handle 126 in transmission connection with the second operating mechanism 121, and the first handle 117 and the second handle 126 are coaxially linked.

In order to facilitate the operator to control the on/off state of the residual current circuit breaker 100 outside the housing, a first handle 117 is disposed on the first operating mechanism 111, the first handle 117 is in transmission connection with the first operating mechanism 111, the first operating mechanism 111 can be driven to open or close by pressing the first handle 117, and the first handle 117 and the second handle 126 are coaxially linked.

In order to make the electrical leakage breaker 100 compact, the first operating mechanism 111 is disposed at a position close to one side of the housing, the first handle 117 is disposed on the housing, the first operating mechanism 111 can be driven to rotate when the first handle 117 is pressed, and in order to reduce the volume occupied by the handles, the first handle 117 and the second handle 126 are boat-shaped handles which are disposed in a range of a small rotation angle (5)⁰-45⁰) The normal opening and closing operation of the operating mechanism can be realized.

In one manner of implementing the embodiment of the present invention, as shown in fig. 2, the electromagnetic release 114 includes a leakage release 1142 and a short-circuit release 1141, which are connected, wherein the short-circuit release 1141 is located at a side close to the first operating mechanism 111.

The electromagnetic release 114 pushes the first operating mechanism 111 to open the brake under the control of the short-circuit signal or the leakage signal, and in order to identify the two signals, the electromagnetic release 114 includes a leakage release 1142 and a short-circuit release 1141, which are connected, the leakage release 1142 is connected with the transformer 125, the transformer 125 senses the leakage signal, and the leakage release 1142 acts according to the leakage signal and pushes the first operating mechanism 111 to act, so that the first moving contact 112 is separated from the first fixed contact 113. When the current flowing through the protection electrode is greater than the short-circuit action current, the short-circuit release 1141 acts according to the short-circuit signal and pushes the first operating mechanism 111 to act, so that the first moving contact 112 is separated from the first fixed contact 113.

Wherein, the leakage release 1142 includes quiet iron core, moves iron core and push rod, and when the leakage release 1142 perception leakage signal, it is close to quiet iron core and makes the push rod stretch out and promote first operating device 111 to move the iron core, and first operating device 111 sets up with the drive of first moving contact 112 to make the motion of first moving contact. Short-circuit release 1141 sets up the same with electric leakage release 1142, also includes quiet iron core, moves iron core and push rod, when being connected the setting with electric leakage release 1142 and short-circuit release 1141, electric leakage release 1142 is connected the setting with short-circuit release 1141's push rod, when electric leakage release 1142 perception electric leakage signal, the motion of drive push rod, when short-circuit release 1141 perception short-circuit signal, also the motion of drive push rod.

It should be noted that, the short circuit release 1141 determines whether a short circuit condition exists on the circuit according to a relationship between a current on the first fixed contact 113 and a preset short circuit operation current, so that the first fixed contact 113 is wound on the short circuit release 1141, and extends to an operation end of the short circuit release 1141 to form a contact, and contacts with the first movable contact 112.

Optionally, as shown in fig. 2 and 4, the protection pole 110 further includes a protection pole arc extinguish chamber 116 disposed on one side of the electromagnetic trip 114, and the neutral pole 120 further includes a neutral pole arc extinguish chamber 124 disposed corresponding to the protection pole arc extinguish chamber 116.

When the first fixed contact 113 is separated from the first moving contact 112 and the second fixed contact 123 is separated from the second moving contact 122, an arc is generated, an arc extinguishing chamber needs to be arranged to extinguish the generated arc, and the arc extinguishing chamber 116 of the protection electrode extinguishes the arc generated when the first fixed contact 113 is separated from the first moving contact 112; the neutral arc extinguishing chamber 124 extinguishes an arc generated when the second stationary contact 123 and the second movable contact 122 are separated.

As shown in fig. 2, the arc chute 116 is disposed on one side of the electromagnetic trip 114, and as shown in fig. 4, the arc chute 124 is disposed at a corresponding position of the arc chute 116, so that the overall structure of the residual current circuit breaker 100 is compact.

In order to guide the generated arc to the arc extinguish chamber, a first arc striking plate is arranged below the arc extinguish chamber 116 of the protection electrode, and one end of the first arc striking plate extends to the lower part of the first movable contact 112; similarly, a second arc striking plate is disposed below the neutral arc extinguishing chamber 124, and one end of the second arc striking plate extends to a position below the second movable contact 122.

In an implementation manner of the embodiment of the present invention, as shown in fig. 4, a circuit board 130 is disposed between the neutral pole 120 and the guard pole 110, a status indication mechanism is disposed on one side of the neutral pole 120 of the circuit board 130, the status indication mechanism includes a torsion spring 131 and pins 132 respectively contacting with two ends of the torsion spring 131, one end of the torsion spring 131 is in transmission connection with the second handle 126 of the neutral pole 120, and the second handle 126 drives one end of the torsion spring 131 to contact with or separate from the pins 132.

In order to clearly display the current state, i.e. the closing state or the opening state, of the residual current circuit breaker 100, the circuit board 130 is provided with a state indicating mechanism, as shown in fig. 4, when the residual current circuit breaker 100 is opened, two ends of the torsion spring 131 are respectively contacted with pins 132 at two sides to generate an electric signal, and the circuit board 130 can judge that the residual current circuit breaker 100 is in the opening state according to the electric signal; as shown in fig. 5, when the residual current circuit breaker 100 is closed, the second handle 126 rotates to drive one end of the torsion spring 131 to separate from the pin 132, and at this time, the electric signal is not turned on, and the circuit board 130 cannot receive the electric signal, so that it can be determined that the residual current circuit breaker 100 is in a closed state. The circuit board 130 can determine the state of the earth leakage breaker 100 according to the presence or absence of the electrical signal.

Optionally, as shown in fig. 4, the residual current circuit breaker 100 further includes a signal port 133 connected to the circuit board 130, and the signal port 133 is used for transmitting signals to an external device.

The signal port 133 can transmit the switching-on/off signal on the circuit board 130 to an external device, so that the state of the residual current circuit breaker 100 is considerable, and the signal port 133 can also be provided with an address line for judging which residual current circuit breaker 100 the switching-on/off signal belongs to; since usually a plurality of residual current circuit breakers 100 are arranged inside one and the same cabinet, the address lines allow the operator to easily identify the state of each residual current circuit breaker 100.

In an implementation manner of the embodiment of the present invention, as shown in fig. 4, the electrical leakage breaker 100 further includes an indicator 134 connected to the circuit board 130, and the indicator 134 indicates the state of the electrical leakage breaker 100 according to the contact or separation of the pin 132 and the second handle 126.

In order to clearly display the state of the circuit breaker, the circuit board 130 is connected with an indicator lamp 134, when the circuit board 130 receives an electric signal, the indicator lamp 134 is controlled to display one state, and when the circuit board 130 does not receive the electric signal, the indicator lamp 134 is controlled to display the other state, so that the state of the residual current circuit breaker 100 can be observed. The specific state setting of the indicator light 134 is not specifically limited, and the indicator light may be turned off by bright display or turned on by unlighted display; the display can be switched off by red display, switched on by green display or other types, and the setting can be performed by those skilled in the art according to the actual situation.

Optionally, as shown in fig. 2, the residual current circuit breaker 100 further includes a thermal release 115 disposed between the housing and the first operating mechanism 111, the thermal release 115 is connected to the first movable contact 112, and the thermal release 115 drives the first operating mechanism 111 to open.

When the residual current circuit breaker 100 is switched on, the first moving contact 112 contacts with the first fixed contact 113, current flows through the first moving contact 112 and the first fixed contact 113, the thermal trip 115 is connected with the first moving contact 112, when the current in the first moving contact 112 exceeds the rated current, the current in the thermal trip 115 also exceeds the rated current, the thermal trip 115 generates heat and accumulates, and when the temperature in the thermal trip 115 exceeds the preset temperature, the thermal trip 115 changes and drives the first operating mechanism 111 to act, so that the first operating mechanism 111 is switched off.

The arrangement of the thermal release 115 enables the residual current circuit breaker 100 to be automatically switched off when the temperature of the thermal release exceeds a certain value, so that overcurrent protection of a circuit is realized, and the thermal release 115 is arranged between the shell and the first operating mechanism 111, so that the structure in the residual current circuit breaker 100 is compact while the overcurrent protection function is not influenced.

In an implementation manner of the embodiment of the present invention, as shown in fig. 2, the thermal release 115 includes a bimetal, one end of the bimetal is fixed to the housing, and the other end of the bimetal is heated to bend toward the first operating mechanism 111, so as to push the first operating mechanism 111 to open.

The bimetallic strip is a composite material composed of two or more metals or other materials with proper performance, when the current in the residual current circuit breaker 100 exceeds the rated current, the current flowing through the bimetallic strip exceeds the rated current, so that the bimetallic strip generates heat, and as the thermal expansion coefficients of all elements in the bimetallic strip are different, the heated bimetallic strip is bent to push the first operating mechanism 111 to open the brake, so that the first fixed contact 113 and the first movable contact 112 are driven to be separated, and the overcurrent protection function of the circuit is realized.

One end of the bimetal is fixed to the housing, and the other end of the bimetal is arranged at a position close to the first operating mechanism 111 as a driving end, so that the driving end deforms to drive the first operating mechanism 111 to move. When the bimetallic strip is fixed with the shell, the bimetallic strip and the first arc striking plate can be fixed with the shell.

In an implementation manner of the embodiment of the present invention, as shown in fig. 4 and fig. 6, a test button 141 is further disposed on one side of the second handle 126 on the housing, an elastic member 142 is further disposed in the housing corresponding to the test button 141, and the test button 141 is pressed to compress the elastic member 142, so that one end of the elastic member 142 is connected to the second movable contact 122 in the closed state.

In practical applications, it takes a time interval to test whether the residual current circuit breaker 100 can be automatically disconnected during a leakage to realize a function of protecting a load and a circuit, and a test button 141 is disposed on one side of the second handle 126 on the housing, as shown in fig. 6, when the residual current circuit breaker 100 is switched on, the test button 141 is pressed to make one end of the elastic member 142 contact with the second movable contact 122, and the other end of the elastic member 142 contact with the input end of the protection electrode 110, so that a current sum in the transformer 125 is not zero because a part of the current does not pass through the transformer 125, and a leakage signal is sent. The test button 141 is pressed to artificially generate a leakage signal to detect whether the leakage protection function of the leakage circuit breaker 100 is normal, so as to ensure that the leakage circuit breaker 100 can automatically open the brake to realize the leakage protection function when the leakage phenomenon occurs in the circuit.

As shown in fig. 4, the elastic member 142 is an L-shaped torsion spring 131, when the test button 141 is pressed, the movable end of the torsion spring 131 moves to the vicinity of the second operating mechanism 121, and when the earth leakage breaker 100 is switched on, the second operating mechanism 121 drives the second movable contact 122 to approach and contact the movable end of the torsion spring 131, so that the movable end of the torsion spring 131 contacts the second movable contact 122, and the test circuit is conducted. When the residual current circuit breaker 100 is disconnected and the test button 141 is pressed, one end of the torsion spring 131 is displaced but cannot be in contact with the second movable contact 122, so that the damage to the residual current circuit breaker 100 caused by the conduction of the test circuit when the residual current circuit breaker 100 is disconnected is avoided. After the L-shaped torsion spring 131 is pressed, the elastic potential energy is restored to drive the test button 141 to reset, so as to perform the next test.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electric leakage circuit breaker (100) is characterized by comprising a shell, and a neutral pole (120) and a protective pole (110) which are arranged in parallel in the shell, wherein the protective pole (110) comprises a first operating mechanism (111), a first moving contact (112), a first fixed contact (113) and an electromagnetic trip (114) which are sequentially arranged, the first operating mechanism (111) is driven to drive the first moving contact (112) to close or open a switch with the first fixed contact (113), the neutral pole (120) comprises a second operating mechanism (121), a second moving contact (122), a second fixed contact (123) and a mutual inductor (125) which are sequentially arranged, the first fixed contact (113) and the second fixed contact (123) are arranged by penetrating through the mutual inductor (125), the second operating mechanism (121) is coaxially linked with the first operating mechanism (111), and the mutual inductor (125) is connected with the electromagnetic trip (114), the electromagnetic trip (114) pushes the first operating mechanism (111) to open under the control of a short-circuit signal or a leakage signal.

2. The residual current circuit breaker (100) according to claim 1, characterized in that said protection pole (110) further comprises a first handle (117) in driving connection with said first operating mechanism (111), said neutral pole (120) further comprises a second handle (126) in driving connection with said second operating mechanism (121), said first handle (117) and said second handle (126) being coaxially coupled.

3. The residual current circuit breaker (100) according to claim 1, characterized in that said electromagnetic trip (114) comprises a connectively arranged residual current trip (1142) and a short circuit trip (1141), wherein said short circuit trip (1141) is located close to a side of said first operating mechanism (111).

4. Residual-current circuit breaker (100) according to claim 1, characterized in that said protection pole (110) further comprises a protection pole arc chute (116) arranged on one side of said electromagnetic trip (114), said neutral pole (120) further comprises a neutral pole arc chute (124) arranged in correspondence of said protection pole arc chute (116).

5. The residual current circuit breaker (100) according to claim 4, characterized in that a circuit board (130) is arranged between the neutral pole (120) and the protection pole (110), a status indicating mechanism is arranged on one side of the neutral pole (120) of the circuit board (130), the status indicating mechanism comprises a torsion spring (131) and pins (132) respectively contacting with two ends of the torsion spring (131), one end of the torsion spring (131) is in transmission connection with a second handle (126) of the neutral pole (120), and the second handle (126) drives one end of the torsion spring (131) to contact with or separate from the pins (132).

6. The residual current circuit breaker (100) according to claim 5, characterized in that it further comprises a signal port (133) connected to said wiring board (130), said signal port (133) being adapted to transmit signals with the outside.

7. The residual current circuit breaker (100) according to claim 5, further comprising an indicator light (134) connected to the circuit board (130), wherein the indicator light (134) indicates the state of the residual current circuit breaker (100) according to the contact or separation of the pin (132) and the second handle (126).

8. The residual current circuit breaker (100) according to claim 1, further comprising a thermal release (115) disposed between said housing and said first operating mechanism (111), wherein said thermal release (115) is connected to said first movable contact (112), and said thermal release (115) is driven to open said first operating mechanism (111).

9. The residual current circuit breaker (100) according to claim 8, characterized in that said thermal release (115) comprises a bimetallic strip, one end of which is fixed to said casing and the other end is heated to bend towards said first operating mechanism (111) to push said first operating mechanism (111) to open.

10. The residual current circuit breaker (100) according to claim 1, wherein a test button (141) is further disposed on one side of the second handle (126) on the housing, an elastic member (142) is further disposed inside the housing corresponding to the test button (141), and the test button (141) is pressed to push the elastic member (142), so that one end of the elastic member (142) contacts with the second movable contact (122) in the closed state.