CN110880440A - Leakage protection link gear and leakage protection circuit breaker - Google Patents

Abstract

The invention provides an electric leakage protection linkage mechanism and an electric leakage protection circuit breaker, which are used for being abutted and matched with an operating mechanism, wherein the operating mechanism comprises a moving contact and a rotating plate for driving the moving contact to move, a linkage piece is clamped with the rotating plate, a lantern ring piece comprises a first pin for abutting against a test button, a second pin which is driven by the linkage piece and can be communicated with a magnet yoke and an intermediate part fixed on the linkage piece, and the first pin and the second pin are both elastically and fixedly connected with the intermediate part. When the moving contact is abutted to the fixed contact, the test system driven by the test button can normally detect the leakage protection circuit breaker, and the leakage protection function normally works; when the moving contact is not abutted to the static contact, the second pin is not conducted with the magnetic yoke, and the test button presses the first pin down, so that the conductive function cannot be realized, the circuit board and the electric leakage release can be protected from being damaged in the off state of the mechanism, and the circuit board and the electric leakage release are irrelevant to the wiring positions of a power supply and a load in a circuit.

Description

Leakage protection link gear and leakage protection circuit breaker

Technical Field

The invention relates to the technical field of circuit breakers, in particular to an electric leakage protection linkage mechanism and an electric leakage protection circuit breaker.

Background

The leakage circuit breaker is a switch which can automatically act when the residual current in the circuit exceeds a preset value, directly or indirectly provides protection for the danger of electric shock to people or electric equipment, or provides protection for fire caused by ground fault and line insulation damage, and can timely bear, close and open the current in a normal circuit according to the states of circuit abnormity, overload, circuit breaking, circuit leakage and the like, thereby ensuring the safety of people and equipment.

The existing leakage protection circuit breaker testing loop generally needs to directly get electricity from a circuit board, the circuit board gets electricity from a line outlet end in a circuit, wiring must be strictly carried out according to a line inlet end and a line outlet end identification in the installation and use processes, if the situation that the line inlet and the line outlet are reversely connected occurs, the risk of burning a leakage release coil and the circuit board can occur, the product loses the leakage protection function, if the reverse wiring is needed, the model must be replaced, and inconvenience is brought to use.

Disclosure of Invention

The invention aims to provide an electric leakage protection linkage mechanism and an electric leakage protection circuit breaker, and aims to solve the technical problem that the electric leakage protection circuit breaker in the prior art is possibly burnt when reversely connected.

In order to achieve the purpose, the invention adopts the technical scheme that: the operating mechanism comprises a moving contact and a rotating plate for driving the moving contact to move, the moving contact comprises a linkage part and a sleeve ring part, the linkage part is clamped with the rotating plate, the sleeve ring part comprises a first pin for being abutted to a test button, a second pin which is driven by the linkage part and can be communicated with a magnetic yoke and an intermediate part fixed on the linkage part, and the first pin and the second pin are both in elastic fixed connection with the intermediate part.

Furthermore, a first rotating shaft penetrates through the linkage piece, and the linkage piece and the collar piece are both sleeved on the first rotating shaft.

Furthermore, the linkage piece comprises a rotating body rotatably connected with the first rotating shaft and a first buckling part capable of being buckled with the rotating plate, and the rotating body is fixedly connected with the first buckling part.

Further, one side of the rotating body extends to form a fixed sleeve ring for accommodating the middle part, and a notch groove for extending the first pin is formed in the fixed sleeve ring.

Furthermore, one side of the fixed lantern ring is provided with a linkage bracket for limiting the second pin to rotate, and the second pin is located on the linkage bracket.

Further, the first rotating shaft is communicated with the leakage tripping device through a lead.

Furthermore, the collar piece is a torsion spring, and the middle part of the torsion spring is sleeved on the first rotating shaft.

The invention also discloses an electric leakage protection circuit breaker, which comprises an operating mechanism, an electric leakage release, a test button, a zero sequence current transformer and the electric leakage protection linkage mechanism, wherein a coil and magnetic yokes arranged at two opposite ends of the coil are annularly arranged at the outer side of the electric leakage release.

The first pin can be communicated with the conductive tube, and the conductive tube is communicated with the circuit board after penetrating through the zero sequence current transformer.

Furthermore, the operating mechanism comprises a moving contact and a rotating plate for driving the moving contact to move, one side of the coil is communicated with a fixed contact, and the moving contact can be communicated with the fixed contact.

The electric leakage protection linkage mechanism and the electric leakage protection circuit breaker have the advantages that: compared with the prior art, the leakage protection linkage mechanism and the leakage protection circuit breaker can drive the moving contact to move through the rotation of the rotating plate and simultaneously realize the clamping with the linkage piece, when the moving contact is driven to abut against the static contact, the linkage piece and the rotating plate are clamped and drive the sleeve ring piece to rotate, so that the second pin is electrically conducted with the magnet yoke, the first pin is always abutted against the test button, and at the moment, a test system driven by the test button can normally detect the leakage protection circuit breaker; when the rotor plate drives the moving contact and not with static contact looks butt, the second pin does not switch on with the yoke this moment, and test button pushes down first pin and also can't realize electrically conductive function, only when operating device closed promptly, earth leakage protection function and test function just can normally work to make earth leakage protection circuit breaker possess last inlet wire or lower inlet wire function, its structure is comparatively simple and can reach better effect that prevents the electric leakage, and the practicality is stronger.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of an earth leakage protection circuit breaker according to an embodiment of the present invention;

FIG. 2 is a partially enlarged schematic view of a portion A in FIG. 1;

fig. 3 is a first schematic structural diagram of the earth leakage protection linkage mechanism according to the embodiment of the present invention;

fig. 4 is a schematic structural diagram of a leakage protection linkage mechanism according to an embodiment of the present invention;

FIG. 5 is a perspective view of a link member and collar member used in an embodiment of the present invention;

fig. 6 is a schematic perspective view of an earth leakage protection linkage mechanism according to an embodiment of the present invention.

Description of reference numerals:

1. an earth leakage protection linkage mechanism; 2. an operating mechanism; 3. a lead wire; 4. an electric leakage release; 5. a test button; 6. a zero sequence current transformer; 7. a conductive tube; 8. a housing; 9. a line; 11. a linkage member; 12. a collar member; 13. a first rotating shaft; 111. rotating the body; 112. a first buckling part; 113. a fixed collar; 114. a linkage bracket; 1131. a notch groove; 121. a first pin; 122. a second pin; 123. an intermediate portion; 21. a moving contact; 22. a rotating plate; 23. static contact; 24. a second rotating shaft; 221. a second fastening part; 41. a coil; 42. and a magnetic yoke.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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 invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1, the present invention further provides an earth leakage protection circuit breaker, which includes an operating mechanism 2, an earth leakage release 4, a test button 5, a zero sequence current transformer 6, and an earth leakage protection linkage mechanism 1, wherein a coil 41 and yokes 42 disposed at two opposite ends of the coil 41 are disposed around an outer side of the earth leakage release 4.

The operating mechanism 2 is used for realizing opening and closing control between the moving contact 21 and the fixed contact 23, the electrical leakage release 4 is a device for releasing the holding mechanism and automatically disconnecting the circuit breaker, a coil 41 is wound on an outer ring of the electrical leakage release 4, magnetic yokes 42 are formed at two ends of the electrical leakage release, the magnetic yokes 42 can be abutted and conducted with the second pins 122, the coil 41 is wound on the outer side of the electrical leakage release 4, one end of the coil 41 can be conducted with the fixed contact 23, and the other end of the coil 41 can be conducted with a wire inlet end. The test button 5 is arranged in a test system and used for testing the leakage protection performance of the system before use, the test button system is associated with the moving contact 21, only when the operating mechanism 2 is closed, the circuit board 9 can get electricity from a circuit, and the leakage protection function and the test function normally work, so that the leakage protection circuit breaker has an upper wire inlet function or a lower wire inlet function. The zero sequence current transformer 6 is arranged on one side of the circuit board 9, and a lead wire can be connected with the circuit board 9 through the zero sequence current transformer 6, wherein the lead wire directly penetrates through the zero sequence current transformer 6, the number of parts and the welding process are reduced, one end of the lead wire is connected to the circuit board 9, and the other end of the lead wire is connected to the conductive column. The leakage trip unit 4 and the zero sequence current transformer 6 may be conventional leakage trip unit 4 and zero sequence current transformer 6 in the prior art, which is not limited herein. In other embodiments of the present invention, the earth leakage protection circuit breaker may further include an arc extinguish chamber (not shown), a lever assembly (not shown), and other components, which are not described in detail herein for the prior art.

Further, referring to fig. 1, as a specific embodiment of the earth leakage protection circuit breaker provided by the present invention, the earth leakage protection circuit breaker further includes a conductive tube 7 disposed on a pressing path of the test button 5, the first pin 121 may be conducted with the conductive tube 7, and the conductive tube 7 is conducted with the zero sequence current transformer 6. Specifically, the conducting tube 7 is directly fixed on the earth leakage protection circuit breaker shell 8, the conducting tube 7 generally and directly adopts a copper tube and the like to realize a conductive tube body, the conducting tube 7 is located below the test button 5, the first pin 121 can be conducted with the conducting tube 7 when the test button 5 is pressed down, the conducting tube 7 penetrates through the zero sequence current transformer 6 and is communicated with the 9 circuit board through a lead, the circuit communication of the first pin 121 and the circuit board 9 can be realized, then, the connection of a circuit of the test system can be realized, when the second pin 122 is also communicated with the magnetic yoke 42, the whole test system can be closed, and the test system can simulate an earth leakage fault signal.

Referring to fig. 2 to 4 together, the present invention specifically discloses an earth leakage protection linkage mechanism 1, which is used for being abutted against and matched with an operating mechanism 2, wherein the operating mechanism 2 includes a movable contact 21 and a rotating plate 22 for driving the movable contact 21 to move, and includes a linkage 11 and a collar member 12, the linkage 11 is engaged with the rotating plate 22, the collar member 12 includes a first pin 121 for abutting against a test button 5, a second pin 122 driven by the linkage 11 and capable of being conducted with a magnetic yoke 42, and an intermediate portion 123 fixed on the linkage 11, and both the first pin 121 and the second pin 122 are elastically and fixedly connected with the intermediate portion 123.

According to the leakage protection linkage mechanism 1 provided by the invention, the moving contact 21 can be driven to move through the rotation of the rotating plate 22, and meanwhile, the clamping with the linkage piece 11 is realized, when the moving contact 21 is driven to abut against the static contact 23, the linkage piece 11 and the rotating plate 22 are clamped and drive the collar piece 12 to rotate, so that the second pin 122 is conductive to the magnetic yoke 42, the first pin 121 is always abutted against the test button 5, and at the moment, a test realization system driven by the test button 5 can normally detect the leakage protection circuit breaker; when the rotating plate 22 drives the moving contact 21 not to abut against the static contact 23, the second pin 122 is not conducted with the magnetic yoke 42, the test button 5 presses the first pin 121 down, and the electric conduction function cannot be realized, that is, only when the operating mechanism 2 is closed, the electric leakage protection function and the test function can normally work, so that the electric leakage protection circuit breaker has an upper wire inlet function or a lower wire inlet function, and the practicability is high.

The operating mechanism 2 includes a movable contact 21 and a rotating plate 22 for driving the movable contact 21 to move, one side of the coil 41 is communicated with a fixed contact 23, and the movable contact 21 can be communicated with the fixed contact 23. The operating mechanism 2 of the earth leakage protection circuit breaker can realize the conduction or disconnection of the moving contact 21 and the static contact 23, the second rotating shaft 24 is arranged in the middle of the rotating plate 22 in a penetrating mode, and the rotating plate 22 can manually or automatically rotate around the second rotating shaft 24, so that the moving contact 21 is driven to move and is abutted to or separated from the static contact 23. A second buckling part 221 is formed on one side of the rotating plate 22 away from the movable contact 21, and the first buckling part 112 and the second buckling part 221 can buckle and press the linkage 11 down after the rotating plate 22 rotates, so as to drive the collar member 12 to rotate, so that the second pin 122 is conducted with the magnetic yoke 42; or, the first engaging portion 112 and the second engaging portion 221 are separated after the rotating plate 22 rotates, and the linkage 11 is automatically lifted, so that the second pin 122 is separated from the magnetic yoke 42, and at this time, no matter the position of the first pin 121, the test button 5 is located in the test system, and the power-taking operation cannot be realized from the circuit board 9.

Further, referring to fig. 2 to fig. 4, as an embodiment of the earth leakage protection linkage mechanism 1 provided by the present invention, a first rotating shaft 13 is further penetrated through the linkage member 11, and the linkage member 11 and the collar member 12 are both sleeved on the first rotating shaft 13. Specifically, first pivot 13 direct mount is on earth leakage circuit breaker's casing 8, and earth leakage circuit breaker's casing 8 epirelief is equipped with the bellying that is used for the first pivot 13 of block, first pivot 13 can not realize rotating in the bellying, link 11 and lantern ring piece 12 all directly overlap locate first pivot 13 on, and link 11 and lantern ring piece 12 all can encircle first pivot 13 and realize relative rotation, first pivot 13 can realize that the rotation of link 11 and lantern ring piece 12 is fixed. Of course, according to practical conditions and specific requirements, in other embodiments of the present invention, the link member 11 and the collar member 12 may also rotate around a fixed point in other ways, which are not limited herein.

Further, referring to fig. 2 to fig. 4, as an embodiment of the earth leakage protection linkage mechanism 1 provided by the present invention, the linkage member 11 includes a rotation body 111 rotatably connected to the first rotation shaft 13 and a first buckling portion 112 capable of buckling with the rotation plate 22, and the rotation body 111 and the first buckling portion 112 are fixedly connected. Specifically, the rotating body 111 and the first buckling part 112 are fixedly connected or directly integrally formed, the rotating body 111 is disposed at one side of the first buckling part 112, the first buckling part 112 is a hook plate extending from the rotating body 111 toward the rotating plate 22, the first buckling part 112 is shaped as a plate body with a protruding part protruding upward, the protruding part can be buckled with the second buckling part 221 of the rotating plate 22, and when the movable contact 21 abuts against the fixed contact 23, the first buckling part 112 and the second buckling part 221 are not buckled; when the movable contact 21 is separated from the fixed contact 23, the first engaging portion 112 and the second engaging portion 221 are engaged and pressed downward, so that the movable contact 21 and the earth leakage protection linkage mechanism 1 can be linked and matched. Of course, according to the actual situation and the specific requirement, in other embodiments of the present invention, the first fastening portion 112 and the second fastening portion 221 may be fastened all the time, and the first fastening portion 112 can rotate along with the second fastening portion 221, so that the collar member 12 rotates along with the first fastening portion, and different fitting states are achieved, which is not limited herein.

Further, referring to fig. 5 and fig. 6, as a specific embodiment of the earth leakage protection linkage mechanism 1 provided by the present invention, a fixing collar 113 for accommodating the middle portion 123 extends from one side of the rotating body 111, and a notch 1131 for extending the first pin 121 is formed on the fixing collar 113. Specifically, the fixed collar 113 is an annular cylinder, the fixed collar 113 is disposed on one side of the rotating body 111, and the fixed collar 113 is fixedly connected to or integrally formed with the rotating body 111. The fixed lantern ring 113 and the rotating body 111 are both sleeved on the first rotating shaft 13, the lantern ring piece 12 is arranged inside the fixed lantern ring 113, the middle portion 123 of the lantern ring piece 12 and the fixed lantern ring 113 are coaxially arranged, a notch groove 1131 is formed in the side wall of the fixed lantern ring 113, the first pin 121 can penetrate through the notch groove 1131 to be connected with the test button 5, and the side walls of the two sides of the notch groove 1131 can limit the bending angle of the first pin 121. Of course, according to practical situations and specific requirements, in other embodiments of the present invention, only the fixing collar 113 may be provided with a through hole for the first pin 121 to pass through, which is not limited herein.

Further, referring to fig. 5 and fig. 6, as an embodiment of the earth leakage protection linkage mechanism 1 provided by the present invention, a linkage bracket 114 for limiting the rotation of the second pin 122 is disposed on one side of the fixing collar 113, and the second pin 122 is disposed on the linkage bracket 114. Specifically, the linking bracket 114 is located on a side of the fixed collar 113 away from the rotating body 111, and is formed by opening a notch on one side of the fixed collar 113 and extending from the notch, the extending direction is along a radial direction, the second pin 122 is directly placed on the linking bracket 114, and the downward moving position of the second pin 122 is defined by the linking bracket 114. After the position of the second pin 122 is determined, because the middle portion 123 has certain elasticity, the first pin 121 can still be matched with the test button 5 to move up and down, and the second pin 122 cannot be driven to move up and down, so that after the moving contact 21 and the static contact 23 are disconnected, the test detection system cannot continue to get power from the circuit, and cannot be influenced by the fact that the circuit is an upper line or a lower line.

Further, referring to fig. 6, as a specific embodiment of the leakage protection linkage mechanism 1 provided in the present invention, the first rotating shaft 13 is communicated with the leakage release 4 through the lead 3. Specifically, first pivot 13 is the inboard of vertical fixation at casing 8, and the jack has been seted up to the bottom of first pivot 13, and the one end of lead wire 3 can insert in this jack, and the other end and the electric leakage release 4 of lead wire 3 are linked together, and first pivot 13 switches on with electric leakage release 4 promptly, presses down the back when experimental button 5, and second pin 122 can switch on with yoke 42 mutually, both can switch on experimental test system, has guaranteed the function realization of experimental test system. The bottom of the first rotating shaft 13 is provided with a jack, so that the connection tightness can be ensured, and the lead 3 is not influenced by the rotation of the first rotating shaft 13. Of course, according to practical situations and specific requirements, in other embodiments of the present invention, the first rotating shaft 13 may also be directly a hollow conductive cylinder, and the lead 3 is directly inserted into the inner portion, which is not limited herein.

Further, referring to fig. 5 and fig. 6, as a specific embodiment of the earth leakage protection linkage mechanism 1 provided by the present invention, the collar member 12 is a torsion spring, and the middle portion 123 of the torsion spring is sleeved on the first rotating shaft 13. Specifically, the collar member 12 has a middle portion 123 and a first leg 121 and a second leg 122 on both sides of the middle portion 123, and the shape of the first leg and the second leg is identical to that of a torsion spring, the torsion spring has a spring center and torsion bars extending from both ends of the spring center, the spring center corresponds to the middle portion 123, the two torsion bars correspond to the first leg 121 and the second leg 122, and the spring center is twisted in several loops. Of course, in other embodiments of the present invention, other swinging members like torsion springs can be used as the collar member 12, according to the actual situation and the specific requirement, and the present invention is not limited only.

When in use, the working principle is as follows:

when the circuit is in an open state, the movable contact 21 is separated from the fixed contact 23, one end of the linkage member 11 is in contact with the rotating plate 22, the linkage member 11 rotates for a certain position around the first rotating shaft 13, the first pin 121 and the second pin 122 on the collar member 12 mounted on the linkage member 11 rotate along with the linkage member 11, one end of the second pin 122 is kept separated from the magnetic yoke 42, and at this time, no matter whether the circuit is from an upper line or a lower line, the circuit board 9 cannot take electricity from the circuit. When the test button 5 is pressed down, one end of the first pin 121 is in contact with the conductive tube 7, the second pin 122 is kept separated from the magnetic yoke 42, the test loop cannot be connected, and the circuit board 9 and the leakage release 4 do not work, so that the circuit board 9 and the leakage release 4 are protected from being damaged.

When the circuit is in a closed state, the movable contact 21 is in contact with the fixed contact 23, one end of the linkage member 11 is separated from the rotating plate 22, the linkage member 11 rotates for a certain position around the first rotating shaft 13, the first pin 121 and the second pin 122 on the collar member 12 mounted on the linkage member 11 rotate along with the linkage member 11, one end of the second pin 122 is kept in contact with the magnetic yoke 42, no matter whether the circuit is from an upper line or a lower line, the circuit board 9 gets electricity from the circuit, and the leakage protection function works normally. When the test button 5 is pressed down, one end of the first pin 121 is in contact with the conductive tube 7, and because one end of the second pin 122 is kept closed with the magnetic yoke 42, the test loop is connected, a leakage fault signal is simulated, the leakage release 4 works, the fault is cut off, and the function of the test button 5 can also work normally. It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (10)

1. Earth leakage protection link gear (1) for with operating device (2) butt cooperation, operating device (2) include moving contact (21) and drive the rotor plate (22) that moving contact (21) removed, its characterized in that: the test device comprises a linkage piece (11) and a collar piece (12), wherein the linkage piece (11) is clamped with the rotating plate (22), the collar piece (12) comprises a first pin (121) which is used for being abutted to a test button (5), a second pin (122) which is driven by the linkage piece (11) and can be communicated with a magnetic yoke (42), and a middle part (123) fixed on the linkage piece (11), and the first pin (121) and the second pin (122) are both in elastic fixed connection with the middle part (123).

2. A residual current protection linkage (1) according to claim 1, characterized in that: a first rotating shaft (13) penetrates through the linkage piece (11), and the linkage piece (11) and the collar piece (12) are sleeved on the first rotating shaft (13).

3. A residual current protection linkage (1) according to claim 2, characterized in that: the linkage piece (11) comprises a rotating body (111) rotatably connected with the first rotating shaft (13) and a first buckling part (112) capable of being buckled with the rotating plate (22), and the rotating body (111) is fixedly connected with the first buckling part (112).

4. A residual current protection linkage (1) according to claim 3, characterized in that: one side of the rotating body (111) extends to form a fixed sleeve ring (113) accommodating the middle part (123), and a notch groove (1131) for extending the first pin (121) is formed in the fixed sleeve ring (113).

5. A residual current protection linkage (1) according to claim 4, characterized in that: and a linkage bracket (114) for limiting the second pin (122) to rotate is arranged on one side of the fixed lantern ring (113), and the second pin (122) is positioned on the linkage bracket (114).

6. A residual current protection linkage (1) according to claim 2, characterized in that: the first rotating shaft (13) is communicated with the electric leakage release (4) through a lead (3).

7. A residual current protection linkage (1) according to claim 2, characterized in that: the collar piece (12) is a torsion spring, and the middle part (123) of the torsion spring is sleeved on the first rotating shaft (13).

8. Earth leakage protection circuit breaker, its characterized in that: comprising an operating mechanism (2), an electric leakage release (4), a test button (5), a zero sequence current transformer (6) and the electric leakage protection linkage mechanism (1) according to any one of claims 1 to 7, wherein a coil (41) and yokes (42) arranged at two opposite ends of the coil (41) are arranged around the outer side of the electric leakage release (4).

9. A residual current circuit breaker as claimed in claim 8, characterized in that: the testing device is characterized by further comprising a conductive tube (7) arranged on a pressing path of the testing button (5), the first pin (121) can be conducted with the conductive tube (7), and the conductive tube (7) is conducted with the circuit board (9) after penetrating through the zero sequence current transformer (6).

10. A residual current circuit breaker as claimed in claim 9, characterized in that: the operating mechanism (2) comprises a moving contact (21) and a rotating plate (22) for driving the moving contact (21) to move, one side of the coil (41) is communicated with a fixed contact (23), and the moving contact (21) can be communicated with the fixed contact (23).

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