CN219457509U - Residual current operated circuit breaker - Google Patents

Abstract

The utility model belongs to the technical field of circuit breakers, and discloses a residual current operated circuit breaker. The residual current operated circuit breaker comprises a tripping driving piece, a rotating piece and a locking piece, wherein the tripping driving piece comprises an electromagnet coil and a first iron core, and the electromagnet coil can drive the first iron core to move when electric leakage reaches a rated value. The rotating piece is rotatably arranged on the mounting shell, and one end of the rotating piece is movably connected with the end part of the first iron core, which extends out of the electromagnet coil. One end of the locking piece is rotatably arranged on the mounting shell, the other end of the locking piece is abutted with the other end of the rotating piece, the rotating piece can drive the locking piece to rotate along with the locking piece, the distance from the rotation axis of the locking piece to the abutting force receiving point of the rotating piece and the stop block is L1, the distance between the rotation axis of the locking piece and the original releasing position on the locking piece is L2, and L1 is larger than L2. The residual current operated circuit breaker can reduce the leakage tripping resistance of the residual current operated circuit breaker.

Description

Residual current operated circuit breaker

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to a residual current operated circuit breaker.

Background

The residual current operated circuit breaker is an essential device for ensuring the electricity utilization safety and carrying out circuit switching, and can protect electrical equipment and personal safety. The residual current operated circuit breaker has basic protection functions such as short circuit and the like, and also has a leakage protection function, when the leakage current reaches a rated value, the electromagnet coil is conducted to generate a magnetic field to drive the first iron core to move, and the lock catch is driven to rotate, so that the movable contact and the static contact are controlled to be separated to execute trip tripping, and the circuit safety is ensured.

The current residual current operated circuit breaker has larger common tripping resistance, so that the operation current required by the electromagnet coil is larger and is easier to damage.

Accordingly, there is a need for a residual current operated circuit breaker to solve the above problems.

Disclosure of Invention

The utility model aims to provide a residual current operated circuit breaker, which can reduce the leakage tripping resistance of the residual current operated circuit breaker, reduce the operation current required by an electromagnet coil and is beneficial to the structural optimization of the residual current operated circuit breaker.

To achieve the purpose, the utility model adopts the following technical scheme:

a residual current operated circuit breaker comprising:

the tripping driving piece comprises an electromagnet coil and a first iron core, wherein the electromagnet coil can drive the first iron core to move when the leakage current reaches a rated value;

the rotating piece is rotatably arranged on the mounting shell, and one end of the rotating piece is movably connected with the end part, extending out of the electromagnet coil, of the first iron core;

the locking piece comprises a locking plate and a stop block, wherein one end of the locking plate is rotatably arranged on the installation shell, the other end of the locking plate is provided with the stop block, the other end of the rotating piece is abutted to the stop block, the rotating piece can drive the locking piece to rotate along with the rotating piece, the distance from the rotation axis of the locking piece to the abutting force receiving point of the rotating piece and the stop block is L1, and the distance between the rotation axis of the locking piece and the original tripping position on the locking piece is L2, and L1 is larger than L2.

Alternatively, an included angle β between a connecting line of the stress point of the stopper and the rotation axis of the locking member and the stopper is set to be 0 ° ± 25 °.

As an alternative scheme, the one end of hasp board is provided with the connecting hole, be provided with the pivot in the connecting hole, the pivot rotate connect in the installation casing, the dog set up in the orientation of hasp board one side of rotating the piece, so that the rotating the piece can the butt in the dog.

Alternatively, the rotating member includes:

the rotary plate is provided with an open slot at one end, a clamping slot is arranged at the corresponding position of the first iron core, and the position of the first iron core, where the clamping slot is arranged, is limited in the open slot;

the connecting shaft is arranged on the rotating plate, the connecting shaft is rotationally connected with the mounting shell, and the rotating plate rotates by taking the connecting shaft as an axis;

the pushing block is arranged at one end of the rotating plate, which is far away from the opening groove, and the pushing block is propped against the stop block to push the locking plate to rotate.

As an alternative scheme, the one end of rotating plate that is provided with the ejector pad sets up to the arc, the ejector pad set up in the arc, the corresponding guide way that is provided with on the installation casing, the arc limit is located in the guide way and can follow the guide way slides, the tank bottom of guide way is provided with the through-hole, the ejector pad wears to establish the through-hole.

As an alternative, the distance from the force application point of the first iron core to the rotating plate to the axis of the connecting shaft of the rotating member is L3, and the distance from the axis of the connecting shaft to the force abutting and receiving point of the rotating member and the stop block is L4, where L3 is greater than L4.

As an alternative, the residual current operated circuit breaker further includes:

the electric leakage indicating key can limit the rotating piece after the first iron core is driven to rotate, the electric leakage indicating key is pressed down, and the rotating piece can be restored to an initial state.

Alternatively, the leakage indication key includes:

the button body, including the pressing part and the portion of resisting that are connected, be provided with on the rotating member and dodge the groove, press the pressing part can make the portion of resisting is aimed at dodge the groove, just the portion of resisting can stretch into dodge in the inslot, rotate the rotating member, the button body can be to keeping away from the direction of rotating member removes just the portion of resisting is right the rotating member is kept out, in order to restrict the reverse rotation of rotating member.

Alternatively, the leakage indication key further includes:

the elastic piece, the one end butt of elastic piece in press the portion, be provided with the connecting plate on the installation casing, the other end butt of elastic piece in the connecting plate, first iron core drive when rotating the piece, keep out the portion and avoid rotating the piece, press the portion under the elasticity effect of elastic piece spring, so that keep out the portion keep out in rotate the piece.

As an alternative, the residual current operated circuit breaker further includes a second iron core, the second iron core is disposed opposite to one end of the latch plate, the one end of the latch plate is provided with the stopper, and the second iron core can act to push the latch plate to rotate when the residual current operated circuit breaker is short-circuited.

The beneficial effects are that:

according to the residual current operated circuit breaker provided by the utility model, when the residual current operated circuit breaker is assembled, the lock catch piece is arranged on the moving contact assembly, and the lock catch piece rotates to drive the moving contact assembly to rotate, so that the moving contact assembly is disconnected with the fixed contact assembly, and tripping is realized. Through rotating the one end setting of hasp piece on the installation casing, the other end offsets with the rotation piece, hasp piece pivoted arm of force L1 approximately equals the length of whole hasp piece, for current scheme with original tripping position setting in one side of hasp board, arm of force L1 is greater than arm of force L2 far away, consequently, this application has greatly reduced the required power of drive hasp piece rotation through the cooperation of hasp piece and rotation piece. When residual current operated circuit breaker appears the electric leakage, electromagnet coil will drive first iron core and remove to drive the rotation piece and rotate, because the free end butt of rotation piece and latch fitting, thereby can drive the latch fitting and rotate thereupon, the latch fitting rotates and will drive the moving contact subassembly and rotate, thereby makes moving contact subassembly and static contact subassembly disconnection, realizes tripping operation. Because the force required for driving the locking piece is smaller, the action current required by the electromagnet coil is reduced, the structural optimization of the residual current action circuit breaker is facilitated, meanwhile, the residual current action circuit breaker can be well protected, the residual current action circuit breaker is not easy to damage, and the service life is prolonged.

Drawings

Fig. 1 is a schematic diagram of a residual current operated circuit breaker according to the present utility model;

fig. 2 is a schematic diagram of a structure of a residual current operated circuit breaker according to the present utility model, with a mounting case removed;

fig. 3 is a schematic diagram II of a structure of the installation housing of the residual current operated circuit breaker according to the present utility model;

FIG. 4 is a schematic view of a structure of a locking element according to the present utility model;

FIG. 5 is a schematic view of a structure of a locking element according to the present utility model;

FIG. 6 is a schematic view of a rotating member according to the present utility model;

FIG. 7 is a schematic diagram of a second embodiment of the rotating member according to the present utility model;

FIG. 8 is a schematic view of the structure of the mounting housing provided by the present utility model;

fig. 9 is a schematic structural diagram of a leakage indication key provided by the present utility model.

In the figure:

1. a trip driving member; 11. an electromagnet coil; 12. a first iron core; 121. a clamping groove;

2. a rotating member; 21. a rotating plate; 211. an open slot; 212. an arc-shaped plate; 213. an avoidance groove; 22. a connecting shaft; 23. a pushing block;

3. a mounting shell; 31. a guide groove; 311. a through hole; 32. a connecting plate;

4. a locking piece; 41. a latch plate; 411. a connection hole; 412. an original trip position; 42. a stop block;

5. a leakage indication key; 51. a key body; 511. a pressing part; 512. a resisting part; 52. an elastic member;

6. a moving contact assembly;

7. a stationary contact assembly;

8. and a second iron core.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1-3, the present embodiment provides a residual current operated circuit breaker, which includes a moving contact assembly 6 and a fixed contact assembly 7, and in use, there may be a leakage condition of the residual current operated circuit breaker, in order to ensure use safety, when the leakage current reaches a rated value, the moving contact assembly 6 and the fixed contact assembly 7 need to be separated to implement trip, thereby ensuring circuit safety. The basic structure of the residual current operated circuit breaker is a conventional structure in the prior art, and will not be described in detail herein.

The residual current operated circuit breaker provided by the embodiment can reduce the leakage tripping resistance of the residual current operated circuit breaker through structural improvement. Specifically, as shown in fig. 1 to 3, the residual current operated circuit breaker includes a trip driving member 1, a rotating member 2, and a latch member 4, the trip driving member 1 includes an electromagnet coil 11 and a first iron core 12, and the electromagnet coil 11 is capable of driving the first iron core 12 to move when the leakage current reaches a rated value. The rotating piece 2 is rotatably arranged on the mounting shell 3, and one end of the rotating piece 2 is movably connected with the end part of the first iron core 12 extending out of the electromagnet coil 11. The locking piece 4 includes locking plate 41 and dog 42, and the one end rotation of locking plate 41 sets up in installation casing 3, and the other end of locking plate 41 is provided with dog 42, and the other end butt in dog 42 of rotating piece 2 rotates piece 2 and can drive locking piece 4 rotation thereupon. As shown in fig. 4 and 5, the distance between the rotation axis of the latch member 4 and the abutment force point of the rotary member 2 and the stop block 42 is L1, and the distance between the rotation axis of the latch member 4 and the original release position 412 on the latch member 4 is L2, where L1 is greater than L2. The installation shell 3 can be specifically arranged to be of an integral structure with the shell of the residual current operated circuit breaker, and is convenient to process and install.

The original release position 412 on the catch piece 4 specifically refers to the point of rotational drive force of the catch plate 41 before modification. The original tripping position 412 is a round hole formed in the locking plate 41, the original rotating member is inserted into the round hole, and the first iron core 12 drives the original rotating member to move so as to drive the locking plate 41 to rotate. The original trip position 412 can only be set at one side of the rotation axis of the latch 4 due to the limitation of the original rotation member self structure and the space in the circuit breaker, the connection line between the original trip position 412 and the rotation axis of the latch 4 is basically the same as the moving direction of the first iron core 12, and the original trip position 412 cannot extend too long distance due to the limitation of the space in the circuit breaker, that is, in the prior art before improvement, the rotation force arm L2 of the latch 4 is smaller.

When the residual current operated circuit breaker is assembled, the lock catch piece 4 is arranged on the moving contact assembly 6, and the lock catch piece 4 rotates to drive the moving contact assembly 6 to rotate, so that the moving contact assembly 6 is disconnected with the fixed contact assembly 7, and tripping is realized.

Through setting up the one end rotation of hasp piece 4 on installation casing 3, the other end offsets with rotating piece 2, hasp piece 4 pivoted arm of force L1 approximately equals the length of whole hasp piece 4, for the scheme of the setting in one side of hasp board 41 of original tripping device 412 now, arm of force L1 is greater than arm of force L2 far away, consequently, this application has greatly reduced the required power of drive hasp piece 4 rotation through the cooperation of hasp piece 4 and rotating piece 2. When residual current operated circuit breaker appears the electric leakage, electromagnet coil 11 will drive first iron core 12 and remove to drive rotation piece 2 rotates, because rotation piece 2 and the free end butt of hasp piece 4, thereby can drive hasp piece 4 rotation thereupon, hasp piece 4 rotates and will drive moving contact subassembly 6 rotation, thereby makes moving contact subassembly 6 and stationary contact subassembly 7 disconnection, realizes tripping operation. Because the force required for driving the locking piece 4 is smaller, the action current required by the electromagnet coil 11 is reduced, the structural optimization of the residual current action circuit breaker is facilitated, meanwhile, the residual current action circuit breaker can be well protected, the residual current action circuit breaker is not easy to damage, and the service life is prolonged.

Alternatively, as shown in fig. 5, an angle β between the stress point of the stopper 42 and the rotation axis of the lock catch 4 and the stopper 42 is set to 0 ° ± 25 °. That is, the stopper 42 swings within 25 ° of both sides of the line connecting the force receiving point of the stopper 42 and the rotation axis of the lock catch 4, so that the rotation member 2 can sufficiently abut against the stopper 42 to easily push the stopper 42 to rotate. Preferably, the included angle β is set to 0 °, that is, the stop block 42 is disposed on a line connecting the stress point of the stop block 42 and the rotation axis of the locking member 4, so as to provide the maximum rotation driving force for the stop block 42, and facilitate the rotation of the locking member 4.

Optionally, referring to fig. 3 and 4, one end of the latch plate 41 is provided with a connection hole 411, a rotating shaft (not shown in the drawings) is disposed in the connection hole 411, the rotating shaft is rotatably connected to the mounting housing 3, the stop block 42 is disposed at the other end of the latch plate 41, and the stop block 42 is disposed at a side of the latch plate 41 facing the rotating member 2, so that the rotating member 2 can be abutted against the stop block 42. The locking piece 4 and the rotating piece 2 are respectively arranged at two sides of the installation shell 3, and the locking piece 4 and the moving contact assembly 6 are fixedly connected in a clamping or bolting mode, so that the moving contact assembly 6 can be driven to synchronously rotate when the locking piece 4 rotates.

Alternatively, referring to fig. 1, 3 and 6, the rotating member 2 includes a rotating plate 21, a connecting shaft 22 and a push block 23, one end of the rotating plate 21 is provided with an open slot 211, a corresponding position of the first iron core 12 is provided with a clamping slot 121, and a position of the first iron core 12 where the clamping slot 121 is provided is limited in the open slot 211. The connection shaft 22 is provided to the rotation plate 21, the connection shaft 22 is rotatably connected to the mounting case 3, and the rotation plate 21 rotates about the connection shaft 22. The push block 23 is disposed at one end of the rotation plate 21 facing away from the opening slot 211, and the push block 23 abuts against the stop block 42 to push the latch plate 41 to rotate. Preferably, the push block 23 is configured in a cylindrical shape so as to be able to smoothly abut against the stopper 42, so that the rotation plate 21 is rotated more smoothly.

Preferably, as shown in fig. 6, one end of the rotating plate 21, on which the push block 23 is arranged, is provided with an arc plate 212, the push block 23 is arranged on the arc plate 212, as shown in fig. 8, a guide groove 31 is correspondingly arranged on the mounting housing 3, the arc plate 212 is limited in the guide groove 31 and can slide along the guide groove 31, a through hole 311 is arranged at the bottom of the guide groove 31, and the push block 23 is penetrated through the through hole 311 so as to be abutted with the stop block 42. The arc plate 212 is matched with the guide groove 31 to guide the rotation of the rotating plate 21, so that the rotation is smoother.

Optionally, with reference to fig. 3 to 6, the distance between the axis of the connecting shaft 22 of the rotating member 2 and the stress point of the pushing block 23 is L1, and the distance between the hole center of the connecting hole 411 of the locking member 4 and the stress point of the stop block 42 is L2, where L1 < L2, this arrangement is also beneficial to reducing the design size of the rotating member 2, and in a limited space, ensuring that the locking member 4 has a larger size as much as possible, thereby ensuring that the locking member 4 rotates with a larger moment arm, and thus reducing the force required to push the rotating member 2 to rotate.

Alternatively, as shown in fig. 7, the distance from the point of application of the first iron core 12 to the rotating plate 21 to the axis of the connecting shaft 22 of the rotating member 2 is L3, and the distance from the axis of the connecting shaft 22 to the point of abutment of the rotating member 2 and the stopper 42 is L4, where L3 is greater than L4. According to the lever principle, this arrangement is advantageous in reducing the force required to push the rotor 2 to rotate, further reducing the action current required by the electromagnet coil 11.

Further, referring to fig. 3 and 9, the residual current operated circuit breaker further includes a leakage indicator key 5, where the leakage indicator key 5 can limit the rotating member 2 after the first iron core 12 is driven to rotate, and when the leakage indicator key 5 is pressed, the rotating member 2 can be restored to an initial state, and the driving of the moving contact assembly 6 is canceled, so that the residual current operated circuit breaker can perform a closing operation.

Specifically, as shown in fig. 9, the leakage indication key 5 includes a key body 51, the key body 51 includes a pressing portion 511 and a resisting portion 512 that are connected, as shown in fig. 6, the rotating member 2 is provided with an avoidance groove 213, the pressing portion 511 is pressed to enable the resisting portion 512 to be aligned with the avoidance groove 213, and the resisting portion 512 can extend into the avoidance groove 213, the rotating member 2 is rotated, the key body 51 can move in a direction away from the rotating member 2, and the resisting portion 512 resists the rotating member 2, so as to limit the reverse rotation of the rotating member 2. When electric leakage occurs, the first iron core 12 drives the rotating member 2 to rotate anticlockwise, the resisting part 512 is separated from the rotating member 2, the electric leakage indicating key 5 is sprung upwards, the resisting part 512 is abutted on one side of the rotating member 2, and even if electric leakage danger is eliminated, the rotating member 2 cannot automatically rotate reversely to reset, so that the residual current operated circuit breaker is ensured to maintain a switching-off state; when the electric leakage danger is eliminated, the pressing part 511 is manually pressed to enable the resisting part 512 to be aligned with the avoiding groove 213 on the rotating member 2, at this time, the rotating member 2 can rotate clockwise to reset, and at this time, the circuit can be switched on to a power-on state.

As shown in fig. 9, in order to enable the rotating member 2 to rotate counterclockwise, the leakage indicator key 5 may automatically spring, the leakage indicator key 5 further includes an elastic member 52, one end of the elastic member 52 abuts against the pressing portion 511, as shown in fig. 8, the mounting housing 3 is provided with the connecting plate 32, the other end of the elastic member 52 abuts against the connecting plate 32, and when the first iron core 12 drives the rotating member 2 to rotate, the resisting portion 512 is kept away from the rotating member 2, and the pressing portion 511 springs under the elastic force of the elastic member 52, so that the resisting portion 512 is abutted against the rotating member 2.

Further, referring back to fig. 2, the residual current operated circuit breaker further includes a second iron core 8, the second iron core 8 is disposed opposite to one end of the latch plate 41, the one end of the latch plate 41 is provided with a stop block 42, and the second iron core 8 can act to push the latch plate 41 to rotate when the residual current operated circuit breaker is short-circuited. Because the dog 42 sets up in the one end of keeping away from connecting hole 411 of hasp board 41, the second iron core 8 carries out the application of force to the one end of being provided with dog 42 of hasp board 41, makes hasp board 41 have great rotation power arm, and the tripping resistance is less to can respond rapidly when making residual current operated circuit breaker short circuit and trip, improve the safety in utilization.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. A residual current operated circuit breaker, comprising:

the tripping driving piece (1) comprises an electromagnet coil (11) and a first iron core (12), wherein the electromagnet coil (11) can drive the first iron core (12) to move when the leakage current reaches a rated value;

the rotating piece (2) is rotatably arranged on the mounting shell (3), and one end of the rotating piece (2) is movably connected with the end part of the first iron core (12) extending out of the electromagnet coil (11);

the locking piece (4), including locking piece (41) and dog (42), the one end rotation of locking piece (41) set up in install casing (3), the other end of locking piece (41) is provided with dog (42), the other end butt of rotating piece (2) in dog (42), rotate piece (2) rotate and can drive locking piece (4) rotates thereupon, the distance between the rotation axle center of locking piece (4) to rotate piece (2) with the butt between the accepting force point of dog (42) is L1, the rotation axle center of locking piece (4) with the distance between original tripping position (412) on locking piece (4) is L2, L1 is greater than L2.

2. Residual current operated circuit breaker according to claim 1, characterized in that the angle β between the line of the stress point of the stop (42) and the rotational axis of the latch (4) and the stop (42) is set to 0 ° ± 25 °.

3. The residual current operated circuit breaker according to claim 1, characterized in that one end of the latch plate (41) is provided with a connection hole (411), a rotating shaft is provided in the connection hole (411), the rotating shaft is rotatably connected to the mounting housing (3), and the stopper (42) is provided at a side of the latch plate (41) facing the rotating member (2), so that the rotating member (2) can be abutted to the stopper (42).

4. A residual current operated circuit breaker according to claim 3, characterized in that the rotating member (2) comprises:

the rotary plate (21), one end of the rotary plate (21) is provided with an open slot (211), a clamping slot (121) is arranged at a corresponding position of the first iron core (12), and the position of the first iron core (12) where the clamping slot (121) is arranged is limited in the open slot (211);

a connection shaft (22) provided to the rotation plate (21), the connection shaft (22) being rotatably connected to the mounting case (3), the rotation plate (21) being rotated about the connection shaft (22);

the pushing block (23) is arranged at one end of the rotating plate (21) which is far away from the opening groove (211), and the pushing block (23) abuts against the stop block (42) to push the locking plate (41) to rotate.

5. The residual current operated circuit breaker according to claim 4, characterized in that one end of the rotating plate (21) provided with the push block (23) is provided with an arc plate (212), the push block (23) is provided with the arc plate (212), the installation shell (3) is correspondingly provided with a guide groove (31), the arc plate (212) is limited in the guide groove (31) and can slide along the guide groove (31), the bottom of the guide groove (31) is provided with a through hole (311), and the push block (23) penetrates through the through hole (311).

6. The residual current operated circuit breaker according to claim 4, characterized in that a distance from a point of application of the first iron core (12) to the rotating plate (21) to an axial center of the connecting shaft (22) of the rotating member (2) is L3, and a distance from the axial center of the connecting shaft (22) to a point of abutment receiving force of the rotating member (2) and the stopper (42) is L4, L3 being larger than L4.

7. The residual current operated circuit breaker according to any one of claims 1-6, characterized in that it further comprises:

the electric leakage indicating key (5), electric leakage indicating key (5) can be to first iron core (12) drive rotate after rotating piece (2) spacing, presses electric leakage indicating key (5), rotate piece (2) can resume initial state.

8. Residual current operated circuit breaker according to claim 7, characterized in that the leakage indication key (5) comprises:

button body (51), including pressing portion (511) and the portion of resisting (512) that are connected, be provided with on rotating piece (2) and dodge groove (213), press pressing portion (511) can make portion of resisting (512) aim at dodge groove (213), just portion of resisting (512) can stretch into dodge in groove (213), rotate rotating piece (2), button body (51) can be to keeping away from the direction removal of rotating piece (2) just portion of resisting (512) is right rotating piece (2) is kept out, in order to restrict rotating piece (2) reverse rotation.

9. Residual current operated circuit breaker according to claim 8, characterized in that the leakage indication key (5) further comprises:

elastic component (52), one end butt of elastic component (52) in press portion (511), be provided with connecting plate (32) on installation casing (3), the other end butt of elastic component (52) in connecting plate (32), first iron core (12) drive when rotating piece (2) rotates, keep out portion (512) avoid rotating piece (2), press portion (511) spring up under the elasticity effect of elastic component (52), so that keep out portion (512) keep out in rotating piece (2).

10. The residual current operated circuit breaker according to any one of claims 1-6, characterized in that the residual current operated circuit breaker further comprises a second iron core (8), said second iron core (8) being arranged opposite to one end of the latch plate (41), said one end of the latch plate (41) being provided with said stop (42), said second iron core (8) being capable of being operated to push the latch plate (41) to rotate when the residual current operated circuit breaker is short circuited.