CN215266138U

CN215266138U - Arc fault circuit interrupter

Info

Publication number: CN215266138U
Application number: CN202120536855.1U
Authority: CN
Inventors: 桑立爽; 詹岳明
Original assignee: Shanghai Singi Electrical Co ltd
Current assignee: Shanghai Singi Electrical Co ltd
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2021-12-21
Anticipated expiration: 2031-03-16

Abstract

The utility model discloses an arc fault circuit breaker, a middle shell seat is connected between a front shell cover and a rear shell cover, a first connecting terminal and a second connecting terminal are sequentially arranged on two sides of the middle shell seat, output lines on the first connecting terminal and the second connecting terminal are wound on a first mutual inductor which is electrically connected with a first control circuit board which is electrically connected with a first coil component, a first tripping component is arranged in the installation cavity and linked with a first handle, a first moving contact and a second moving contact are arranged on the first tripping component, the first static contact piece and the second static contact piece are arranged on one side of the first moving contact piece and one side of the second moving contact piece in a matched mode, the first moving contact piece and the second static contact piece are located on one side of the middle shell seat, the second moving contact piece and the second static contact piece are located on the other side of the middle shell seat, the first static contact piece is electrically connected with the second coil component and the third wiring terminal respectively, and the second static contact piece is electrically connected with the second coil component and the fourth wiring terminal respectively. The utility model discloses can realize multinomial safe power consumption and detect.

Description

Arc fault circuit interrupter

Technical Field

The utility model relates to a circuit safety equipment, concretely relates to arc fault circuit breaker.

Background

The circuit breaker is a special device which is specially used for circuit protection and ensures the safety of electricity utilization. The inside of circuit breaker is provided with detection mechanism and is used for short circuit, transships etc. and detect, and in the in-service use process, also there is the too big condition of electric arc, and then influences the normal detection and the use of short circuit, but the structure of the circuit breaker that electrified arc detected on the market is generally more complicated, and the production equipment is inconvenient.

Disclosure of Invention

In view of the not enough of background art, the utility model aims to solve the technical problem that a simple structure is provided, reasonable in design, the circuit breaker of multinomial safe power consumption detection is provided.

Therefore, the utility model discloses an adopt following scheme to realize:

the circuit breaker, including preceding cap and back cap, preceding cap encloses out installation cavity, its characterized in that with back cap: a middle shell seat is connected between the front shell cover and the rear shell cover, a first connecting terminal and a second connecting terminal are sequentially arranged on two sides of the middle shell seat, output lines on the first connecting terminal and the second connecting terminal are wound on a first mutual inductor, the first mutual inductor is electrically connected with a first control circuit board, the first control circuit board is electrically connected with a first coil component, a first tripping component is arranged in the installation cavity and is in transmission connection with a first handle, a torsion spring is connected on the first handle, a first moving contact electrically connected with the first connecting terminal and a second moving contact electrically connected with the second connecting terminal are arranged on the first tripping component, a first static contact piece and a second static contact piece are arranged on one sides of the first moving contact and the second moving contact in a matching manner, the first moving contact and the first static contact piece are positioned on one side of the middle shell seat, and the second moving contact and the second static contact piece are positioned on the other side of the middle shell seat, the first static contact is respectively and electrically connected with the second coil assembly and the third wiring terminal, the second static contact is respectively and electrically connected with the second coil assembly and the fourth wiring terminal, and iron cores in the first coil assembly and the second coil assembly can push the first tripping assembly to act.

The lower part of the first moving contact is provided with a first arc extinguish chamber, one end of the first static contact extends downwards into the first arc extinguish chamber, one side of the second static contact is provided with a second arc extinguish chamber, one end of the second static contact extends into the second arc extinguish chamber, and the first arc extinguish chamber and the second arc extinguish chamber are located on two sides of the middle shell seat.

The first tripping assembly comprises a first swinging frame, the first handle is hinged to one end of a first transmission arm, the other end of the first transmission arm is hinged to the first swinging frame, the first swinging frame is rotatably arranged on the rear shell cover, the first moving contact is arranged on the first swinging frame, a tripping piece is arranged on the first swinging frame in a swinging mode, an extrusion part is arranged on the tripping piece in an extending mode and located in a concave part of the first swinging frame, the first swinging frame is connected with the second swinging frame through a connecting shaft, the second moving contact is arranged on the second swinging frame, and a collision part matched with iron cores in the first coil assembly and the second coil assembly is arranged on the tripping piece.

The rear shell cover is characterized in that a second shell is arranged on one side of the rear shell cover, a second handle is arranged on the second shell body and is linked with the first handle, a fifth wiring terminal and a sixth wiring terminal are arranged at one end of the second shell body, a third wiring terminal and a fourth wiring terminal are electrically connected with a second control circuit board arranged in the second shell body, a second mutual inductor is arranged in the second control circuit board, the second control circuit board is connected with a third coil component, a torsion spring is connected onto the second handle, the second handle is hinged to one end of a second transmission arm, the other end of the second transmission arm is connected with a second tripping component, an iron core in the third coil component can drive the second tripping component and the second handle to move, and the third coil component is electrically connected with the fifth wiring terminal and the sixth wiring terminal on the second shell body.

The second tripping assembly comprises a rotating seat, a first rotating block and a second rotating block are arranged on the rotating seat in a swinging mode, the other end of the second transmission arm is hinged to the first rotating block, the first rotating block can extrude the second rotating block to act, an extending portion capable of extruding the rotating seat is arranged on the second rotating block, and an iron core in the third coil assembly can push the second rotating block to act.

The second mutual inductor is a current mutual inductor.

The first mutual inductor is a zero sequence mutual inductor.

The rear cover shell is internally provided with a bimetallic strip which is electrically connected with the first wiring terminal and the second wiring terminal, when the circuit breaker is closed, one end of a tripping piece on the first tripping assembly hooks the bimetallic strip, and the tripping piece can drive the first swing frame to act when acting.

First coil assembly includes first coil, second coil assembly includes the second coil, around establishing on first coil skeleton around first coil and the second coil, be provided with the iron core in the first coil skeleton.

One end of the second handle is provided with an insertion part in an outward extending mode, and the first handle is provided with a slot for inserting the insertion part.

Adopt above-mentioned technical scheme, the utility model discloses an advantage does: 1. the structure is simple, the design is reasonable, and the large-scale production can be realized; 2. the internal structure is rationally distributed, and electric leakage, overload, short circuit and arc detection can be realized together, so that the multiple safety detection of the circuit breaker can be effectively realized, and the electricity utilization safety is ensured.

Drawings

The utility model discloses there is following figure:

FIG. 1 is a view showing the inner structure of a first casing according to the present invention;

FIG. 2 is a view of FIG. 1 with the partition removed;

FIG. 3 is an enlarged view of a portion of FIG. 2 at the point A;

fig. 4 is a structural view of a second trip assembly of the present invention;

FIG. 5 is a view of FIG. 2 from another perspective with portions of the housing broken away;

fig. 6 is an internal structure view of the second casing of the present invention.

Detailed Description

As shown in the figures, the arc fault circuit breaker disclosed by the utility model comprises a first shell and a second shell 3 which are mutually attached, one end of the first shell is provided with a first incoming line terminal 2, the other end is provided with a first outgoing line terminal 13, the first incoming line terminal 2 is connected with the first outgoing line terminal 13 through a detection component, the detection component is in transmission connection with a first handle 8 arranged on a first shell 1, the second shell 3 is provided with a line inlet groove 4, the first outgoing line terminal 13 is connected with a lead, the lead passes through the line inlet groove 4 and is electrically connected with a first control circuit board 31 arranged in the second shell 3, a first mutual inductor is arranged in the first control circuit board 31, in the embodiment, the first mutual inductor is a current mutual inductor, the first control circuit board 31 is electrically connected with a first coil component 32 in the second shell 3, the first coil component 32 is electrically connected with a second terminal 28 on the second shell 3, a first tripping assembly is arranged on one side of the first coil assembly 32, the first tripping assembly is in transmission connection with a second handle 7 arranged on the second shell 3, the second handle 7 is linked with a first handle 8, specifically, one end of the second handle 7 is provided with an insertion part 27 in an outward extending manner, and the first handle 8 is provided with a slot 29 for inserting the insertion part 27. The action of the iron core in the first coil assembly 32 can push the first trip assembly to rotate the second handle 7. Specifically, the first trip assembly comprises a rotating seat 35, a first rotating block 36 and a second rotating block 33 are arranged on the rotating seat 35 in a swinging mode, one end of the second handle 7 is hinged to one end of a second transmission arm 37, the other end of the second transmission arm 37 is hinged to the first rotating block 36, the first rotating block 36 can extrude the second rotating block 33 to act, an extending portion 34 capable of extruding the rotating seat 35 is arranged on the second rotating block 33, and an iron core in the first coil assembly 32 can push the second rotating block 33 to act. Furthermore, two first wire inlet terminals 2, two first wire outlet terminals 13 and two second wire outlet terminals 28 are arranged on the left and right, the detection assembly comprises a second tripping assembly and a second mutual inductor 9, the output wire of the first wire inlet terminal 2 is wound on the second mutual inductor 9, in this embodiment, the second mutual inductor 9 is a zero sequence mutual inductor, the second mutual inductor 9 is electrically connected with a second control circuit board 12 arranged in the first housing, the second control circuit board 12 is electrically connected with a second coil assembly 14, the second tripping assembly is in transmission connection with a first handle 8, the first handle 8 is connected with a torsion spring, the second tripping assembly is provided with a first moving contact 19 and a second moving contact 23 which are respectively electrically connected with the corresponding first wire inlet terminals 2, one side of the first moving contact and one side of the second moving contact are cooperatively provided with a first static contact 11 and a second static contact 21, the first static contact 11 is respectively electrically connected with the third coil assembly 16 and one of the first wire outlet terminals 13, the second static contact piece 21 is electrically connected with the third coil assembly 16 and the other first outlet terminal 13, and the iron cores in the second coil assembly 14 and the third coil assembly 16 can push the second trip assembly to act. Specifically, the second trip assembly includes a first swing frame 18, the first handle 8 is hinged to one end of a first transmission arm 26, the other end of the first transmission arm 26 is hinged to the first swing frame 18, the first swing frame 18 is rotatably disposed in the first housing 1, the first movable contact 19 is disposed on the first swing frame 18, a trip member 24 is swingably disposed on the first swing frame 18, a pressing portion 38 is extendingly disposed on the trip member 24, the pressing portion 38 is disposed in a recess portion 39 on the first swing frame 18, the first swing frame 18 is connected to the second swing frame 25 through a connecting shaft, the second movable contact 23 is disposed on the second swing frame 25, and the trip member 24 is provided with a collision portion 5 which is matched with the iron cores 17 in the first coil assembly and the second coil assembly. Be provided with first explosion chamber 10 in first moving contact 19's below, the one end downwardly extending of first static contact 11 is provided with second explosion chamber 22 in one side of second static contact 21 in first explosion chamber 10, and the one end of second static contact 21 extends to in the second explosion chamber 22, through setting up first, second explosion chamber respectively, can effectively carry out the arc extinguishing operation to the electric arc that produces when first, second static contact cooperation disconnection. A bimetallic strip 20 is arranged in the first shell 1, the bimetallic strip 20 is electrically connected with the first wire inlet terminal, the first static contact and the second static contact, when the circuit breaker is closed, one end of a tripping piece 24 on the first tripping assembly hooks the bimetallic strip 20, and the tripping piece 24 can drive the first swing frame 18 to act when acting. The second coil assembly 14 includes a second coil, the third coil assembly 16 includes a third coil, the second coil and the third coil are wound around the first coil bobbin 15 in a front-back manner, and an iron core 17 is provided in the first coil bobbin 15.

The utility model discloses a theory of operation is: the live wire and the zero wire are connected into the circuit breaker through the corresponding first incoming line terminals 2, the first handle and the second handle are pulled to drive the first moving contact and the second moving contact to be contacted with the first static contact and the second static contact, so that the connection of an internal circuit of the circuit breaker is realized, because the wires connected with the first incoming line terminals 2 all bypass the second mutual inductor 9, when electric leakage occurs, the second mutual inductor 9 can detect an electric leakage signal and feed the electric leakage signal back to the second control circuit board 12, the second control circuit board 12 controls the second coil 14 to be supplied with enough current to drive the iron core 17 to act, the action of the release member 24 is pushed, the first swing frame and the second swing frame are driven to act, so that the first moving contact and the second moving contact are separated from the first static contact and the second static contact, and the electric leakage detection and the disconnection of the circuit are realized; when the input current is overloaded, the bimetallic strip 20 deforms due to the increase of temperature, so as to drive the release fastener 24 to act, and also drive the first moving contact and the second moving contact to be separated from the first static contact and the second static contact, thereby realizing the overload detection and disconnection of the circuit; when the circuit is short-circuited, the current introduced into the second coil 16 is instantly increased to drive the iron core 17 to act, push the release member 24 to act and drive the first and second moving contacts to be separated from the first and second fixed contacts, so that the short-circuit detection and disconnection of the circuit are realized; when the electric arc of circuit breaker during operation is too big, the electric current in the circuit can the grow, the change of electric current can be detected to the first mutual-inductor on the first control scheme board 31 this moment, and then control enough big electric current and let in first coil pack 32, and then drive the iron core action in the first coil pack 32, promote the swing of second turning block 33, and drive and rotate seat 35 and the swing of first turning block 36, and then drive the swing of second transmission arm 37, finally drive second handle 7 and first handle 8 swing to the disconnection angle, drive the action of first dropout subassembly, make first, the second moving contact with first, the separation of second static contact, realize the inside electric arc fault detection of circuit breaker and disconnection.

The utility model discloses a circuit breaker, its inner structure is rationally distributed, and the production equipment is convenient to can together realize electric leakage, overload, short circuit and electric arc detection, and then effectively realize the multinomial safety inspection of circuit breaker, guarantee the power consumption safety.

Claims

1. The arc fault circuit breaker is characterized by comprising a first shell and a second shell which are mutually attached, wherein one end of the first shell is provided with a first wire inlet terminal, the other end of the first shell is provided with a first wire outlet terminal, the first wire inlet terminal and the first wire outlet terminal are connected through a detection assembly, the detection assembly is in transmission connection with a first handle arranged on a first shell, the second shell is provided with a wire inlet groove, the first wire outlet terminal is connected with a wire, the wire penetrates through the wire inlet groove and is electrically connected with a first control circuit board arranged in the second shell, a first mutual inductor is arranged in the first control circuit board, the first control circuit board is electrically connected with a first coil assembly in the second shell, the first coil assembly is electrically connected with a second wire outlet terminal on the second shell, one side of the first coil assembly is provided with a first tripping assembly, the first tripping component is in transmission connection with a second handle arranged on the second shell, the second handle is linked with the first handle, and an iron core in the first coil component can act to push the first tripping component to act to drive the second handle to rotate.

2. The arc fault circuit interrupter of claim 1, wherein two of said first incoming line terminal, said first outgoing line terminal, and said second outgoing line terminal are disposed side-to-side, said detecting assembly comprises a second trip assembly and a second transformer, an outgoing line of said first incoming line terminal is wound around said second transformer, said second transformer is electrically connected to a second control circuit board disposed in said first housing, said second control circuit board is electrically connected to said second coil assembly, said second trip assembly is drivingly connected to said first handle, said first handle is connected to a torsion spring, said second trip assembly is provided with a first moving contact and a second moving contact which are electrically connected to corresponding first incoming line terminals, a first static contact and a second static contact are disposed on one side of said first moving contact and said second moving contact in cooperation, said first static contact is electrically connected to said third coil assembly and one of said first outgoing line terminals, the second static contact is respectively and electrically connected with the third coil assembly and the other first wire outlet terminal, and iron cores in the second coil assembly and the third coil assembly can push the second tripping assembly to act.

3. The arc fault circuit interrupter of claim 2, wherein a first arc chute is disposed below said first movable contact, one end of said first stationary contact extends downwardly into said first arc chute, a second arc chute is disposed on one side of said second stationary contact, and one end of said second stationary contact extends into said second arc chute.

4. The arc fault circuit interrupter of claim 1, wherein the first trip assembly comprises a rotating base, the rotating base is pivotally provided with a first rotating block and a second rotating block, the second handle is hinged to one end of a second driving arm, the other end of the second driving arm is hinged to the first rotating block, the first rotating block can squeeze the second rotating block to move, the second rotating block is provided with an extending portion capable of squeezing the rotating base, and the iron core in the first coil assembly can push the second rotating block to move.

5. The arc fault circuit interrupter of claim 2 wherein said second trip assembly comprises a first swing frame, said first handle is pivotally connected to one end of a first drive arm, said first drive arm is pivotally connected to a first swing frame at another end thereof, said first swing frame is rotatably disposed within a first housing, said first movable contact is disposed on the first swing frame, a trip member is pivotally disposed on the first swing frame, said trip member is extendedly disposed with a pressing portion, said pressing portion is disposed within a recess on the first swing frame, said first swing frame is connected to a second swing frame via a connecting shaft, said second movable contact is disposed on the second swing frame, and said trip member is disposed with an impact portion engaged with iron cores of said first and second coil assemblies.

6. The arc fault circuit interrupter of claim 1 wherein said first transformer is a current transformer.

7. The arc fault circuit interrupter of claim 2 wherein said second transformer is a zero sequence transformer.

8. The arc fault circuit interrupter of claim 2, wherein a bimetal is disposed within said first housing, said bimetal being electrically connected to said first inlet terminal, said first stationary contact and said third stationary contact, and wherein an end of said trip member on said second trip assembly hooks said bimetal when the circuit interrupter is closed.

9. The arc fault circuit interrupter of claim 2 wherein said second coil assembly comprises a second coil and said third coil assembly comprises a third coil, said second and third coils being wound back and forth on a first coil former, said first coil former having an iron core disposed therein.

10. The arc fault circuit interrupter of claim 1, wherein an insertion portion is provided at one end of the second handle to extend outward, and the first handle is formed with an insertion slot into which the insertion portion is inserted.