CN219106030U

CN219106030U - Small-sized breaker for low-voltage power system

Info

Publication number: CN219106030U
Application number: CN202320137017.6U
Authority: CN
Inventors: 刘保辉; 周毅; 李巍卫; 吴培
Original assignee: Hebei Bao Kay Electric Co ltd
Current assignee: Hebei Bao Kay Electric Co ltd
Priority date: 2023-02-07
Filing date: 2023-02-07
Publication date: 2023-05-30
Anticipated expiration: 2033-02-07

Abstract

The utility model discloses a miniature circuit breaker for a low-voltage power system, which comprises a circuit breaker body, wherein an external plug wire terminal is arranged at the outer top end of the circuit breaker body, a connecting assembly is arranged on the external plug wire terminal, a wire inlet end is arranged at the inner top end of the circuit breaker body, a wire outlet end is arranged at the inner bottom end of the circuit breaker body, an auxiliary contact mechanism is arranged at the inner terminal of the circuit breaker body, and a wire guide channel is arranged at the inner top end of the circuit breaker body. The utility model is convenient for installing and wiring, saves cost, reduces volume, more reliably indicates the on-off state of the circuit breaker, and provides convenience for installation.

Description

Small-sized breaker for low-voltage power system

Technical Field

The utility model relates to the technical field of switches, in particular to a miniature circuit breaker for a low-voltage power system.

Background

The auxiliary contact of the miniature circuit breaker is used for indicating the switching-on and switching-off positions, external signals, interlocking and other purposes of the circuit breaker. The auxiliary contact and the main contact act simultaneously and are used for indicating the opening and closing state of the main contact. The auxiliary contact is mainly used for providing signals of the working state of the main contact for the control circuit, and in many cases, the main contact voltage of the circuit breaker is high, cannot be directly used for monitoring and must be replaced by the auxiliary contact.

The auxiliary contact of the current miniature circuit breaker can only be completed by adding external accessories, so that the use cost can be increased, the use volume is increased, the fault rate is high, and the installation is inconvenient. In order to solve the problem, a miniature circuit breaker for a low-voltage power system is designed, so that the cost is saved, the size is reduced, the on-off state of the circuit breaker is indicated more reliably, and convenience is provided for installation.

But the existing circuit breaker adopts to assemble auxiliary contact accessory when using, and the adhesion appears together after the line trouble for the sound contact, can not accurate instruction circuit breaker closes the split state to and the drawback that has increased the volume after assembling auxiliary contact accessory, increase cost, therefore propose a miniature circuit breaker for low voltage electric power system, practiced thrift the cost promptly, reduced the volume, more reliable instruction circuit breaker closes the split state, also provide convenience for the installation.

Disclosure of Invention

The present utility model aims to provide a miniature circuit breaker for a low-voltage power system, which solves the problems set forth in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a miniature circuit breaker for low voltage power system, includes the circuit breaker body, and the outside top of circuit breaker body is equipped with outside plug wire terminal, is equipped with coupling assembling on the outside plug wire terminal, and the inside top of circuit breaker body is equipped with the inlet wire end, and the inside bottom of circuit breaker body is equipped with the outlet wire end, and the inside terminal of circuit breaker body is equipped with auxiliary contact mechanism, and wire passageway has been seted up on the inside top of circuit breaker body.

Preferably, in order to facilitate connection with the bridge, and facilitate subsequent use, the auxiliary contact mechanism comprises a contact support arranged inside the breaker body, a bridge groove is formed in the contact support, and a bridge is arranged on the bridge groove.

Preferably, in order to more reliably indicate the on-off state of the circuit breaker, the auxiliary contact mechanism further comprises a right spring piece contacting with the right end side part of the bridge, wherein the right spring piece is contacted with the left end side part of the circuit breaker body in the on-off state, and the left end side part is contacted with the left spring piece is contacted with the left end side part of the circuit breaker body in the on-off state.

Preferably, for convenient installation wiring use, be equipped with inside grafting terminal and terminal in the wire passageway, inside grafting terminal and outside plug wire terminal phase-match.

Preferably, the wires connecting the bridge and the right spring leaf, and the bridge and the left spring leaf are connected with the internal plug terminal and the wire column along the wire channel.

Preferably, in order to facilitate the connection and installation with the breaker body, the right spring piece and the left spring piece are provided with bosses at equal intervals, and the bosses are matched with the breaker body.

Preferably, for the wiring of easy to assemble, coupling assembling is including setting gradually common point, circuit breaker break-in state normal close point and the circuit breaker close state normal close point on outside plug wire terminal.

Compared with the prior art, the utility model has the beneficial effects that: the bridge is arranged on the moving contact support and moves with the closing and opening of the moving contact, when the moving contact is at the opening position, the bridge is contacted with the right spring piece to form a closing point, and at the moment, the bridge is opened with the left spring piece; when the movable contact is at the closing position, the bridge and the left spring piece are contacted to become closing points, and the bridge and the right spring piece become opening points at the moment; the external wiring adopts the plug terminal, is convenient for install wiring, saves cost, reduces the volume, more reliably indicates the on-off state of the circuit breaker, and also provides convenience for installation.

Drawings

Fig. 1 is a state of a circuit breaker of a small-sized circuit breaker for a low voltage power system according to the present utility model in a breaking condition;

fig. 2 is a schematic diagram of the external structure of a miniature circuit breaker for a low-voltage power system according to the present utility model;

fig. 3 is a schematic structural view of an external plug wire terminal in a miniature circuit breaker for a low-voltage power system according to the present utility model;

fig. 4 is a schematic diagram of a connection assembly in a miniature circuit breaker for a low voltage power system according to the present utility model;

fig. 5 is a schematic view of the structure of a contact support in a miniature circuit breaker for a low voltage power system according to the present utility model;

fig. 6 is a schematic structural diagram of a bridge in a miniature circuit breaker for a low voltage power system according to the present utility model;

fig. 7 is a schematic structural view of a left spring piece in a miniature circuit breaker for a low-voltage power system according to the present utility model.

In the figure: 1. a bridge; 2. a right leaf spring; 3. a left leaf spring; 4. a wire passage; 5. an internal plug terminal and a wire column; 6. a circuit breaker body; 7. a contact support; 8. an external plug wire terminal; 9. a wire inlet end; 10. a wire outlet end; 11. a common point; 12. normally closed point of breaker in opening state; 13. a bridge groove; 14. the normally closed point of the breaker in the closing state; 15. a boss.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-7, an embodiment of the present utility model is provided: a miniature circuit breaker for a low-voltage power system comprises a circuit breaker body 6, is mainly applied to the low-voltage power system, can indicate the on-off state of the circuit breaker along with the on-off of the circuit breaker, namely saves cost, reduces the volume, more reliably indicates the on-off state of the circuit breaker, and also provides convenience for installation;

the outside top of circuit breaker body 6 is equipped with outside plug wire terminal 8, is equipped with coupling assembling on the outside plug wire terminal 8, and the inside top of circuit breaker body 6 is equipped with wire inlet end 9, and the inside bottom of circuit breaker body 6 is equipped with wire outlet end 10, and the inside terminal of circuit breaker body 6 is equipped with auxiliary contact mechanism, and wire passageway 4 has been seted up on the inside top of circuit breaker body 6.

In one embodiment, referring to fig. 1-7, the auxiliary contact mechanism includes a contact support 7 disposed inside the breaker body 6, the contact support 7 is made of insulating high temperature resistant plastic, so that the main loop and the auxiliary contact loop do not interfere with each other, the auxiliary loop power supply adopts different grades of voltage external power supply according to different customer requirements, a bridge slot 13 is formed in the contact support 7, so that the bridge 1 can be conveniently fixed on the contact support 7, and the bridge slot 13 is provided with the bridge 1, and the bridge slot 13 can limit the up-down, left-right movement of the bridge 1 and can only move along with the movement of the contact;

the auxiliary contact mechanism further comprises a right spring piece 2 which is contacted with the right side of the bridge frame 1 when the breaker body 6 is in a breaking state, and a left side of the auxiliary contact mechanism is contacted with a left spring piece 3 which is contacted with the breaker body 6 when the breaker body 6 is in a closing state; an internal plug terminal and a wire column 5 are arranged in the wire channel 4, and the internal plug terminal and the wire column 5 are matched with an external plug wire terminal 8;

the connecting assembly comprises a common point 11, a breaker opening state normally-closed point 12 and a breaker closing state normally-closed point 14 which are sequentially arranged on the external plug wire terminal 8, the external plug wire terminal 8 is provided with a hole site corresponding to the internal plug wire terminal, and the common point 11, the breaker opening state normally-closed point 12 and the breaker closing state normally-closed point 14 can be freely plugged;

the wires connecting the bridge 1 with the right spring piece 2 and the bridge 1 with the left spring piece 3 are connected with the internal plug-in terminal and the wire post 5 along the wire channel 4.

In one embodiment, referring to fig. 1-7, the right spring piece 2 and the left spring piece 3 are provided with bosses 15 at equal intervals, and the bosses 15 are matched with the breaker body 6, so that the right spring piece 2 and the left spring piece 3 are fixed on the breaker body 6.

Working principle: when the utility model is used, the bridge 1 is arranged in the bridge groove 13 of the contact support 7 and moves together with the contact support 7; the moving contact of the breaker is arranged on the contact support 7; when the breaker is at the opening position, the bridge 1 is contacted with the right spring piece 2 to form a closing point, and the bridge 1 and the left spring piece 3 are opening points; the common point 11 of the external plug wire terminal 8 is connected with the normally closed point 12 in the breaker switching-off state, and the common point 11 is disconnected with the normally closed point 14 in the breaker switching-on state; when the breaker is switched on, the bridge 1 and the contact support 7 rotate clockwise along with the switching-on mechanism, and when the moving contact is contacted with the fixed contact; the bridge 1 and the left spring piece 3 are contacted to be changed into a closed point, and the bridge 1 and the right spring piece 2 are changed into an open point at the moment; the common point 11 of the external plug wire terminal 8 is connected with the normally closed point 14 in the closing state of the circuit breaker, and the common point 11 is disconnected with the normally closed point 12 in the opening state of the circuit breaker. The auxiliary contact state of the breaker in the opening process is opposite to the closing process, the common point 11 and the breaker closing state normally-closed point 14 are connected, the disconnection state of the common point 11 and the breaker opening state normally-closed point 12 is changed into the disconnection state of the common point 11 and the breaker closing state normally-closed point 14, and the common point 11 and the breaker opening state normally-closed point 12 are connected. The external wiring adopts the plug terminal, is convenient for install wiring, saves cost, reduces the volume, more reliably indicates the on-off state of the circuit breaker, and also provides convenience for installation.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A miniature circuit breaker for a low voltage power system, comprising a breaker body (6), characterized in that: the circuit breaker is characterized in that an external plug wire terminal (8) is arranged at the external top end of the circuit breaker body (6), a connecting assembly is arranged on the external plug wire terminal (8), a wire inlet end (9) is arranged at the internal top end of the circuit breaker body (6), a wire outlet end (10) is arranged at the internal bottom end of the circuit breaker body (6), an auxiliary contact mechanism is arranged at the internal terminal end of the circuit breaker body (6), and a wire guide channel (4) is formed in the internal top end of the circuit breaker body (6).

2. A miniature circuit breaker for a low voltage power system according to claim 1, wherein: the auxiliary contact mechanism comprises a contact support (7) arranged inside the breaker body (6), a bridge groove (13) is formed in the contact support (7), and a bridge (1) is arranged on the bridge groove (13).

3. A miniature circuit breaker for a low voltage power system according to claim 2, wherein: the auxiliary contact mechanism further comprises a right spring piece (2) which is contacted with the right end side part of the bridge frame (1) when the breaker body (6) is in a breaking state, and a left end side part is contacted with a left spring piece (3) which is contacted with the left side of the breaker body (6) when the breaker body is in a closing state.

4. A miniature circuit breaker for a low voltage power system according to claim 3, wherein: the wire channel (4) is internally provided with an internal plug-in terminal and a wire column (5), and the internal plug-in terminal and the wire column (5) are matched with the external plug wire terminal (8).

5. A miniature circuit breaker for a low voltage power system according to claim 4, wherein: the wire connecting the bridge (1) and the right spring piece (2) and the wire connecting the bridge (1) and the left spring piece (3) is connected with the internal plug terminal and the wire column (5) along the wire channel (4).

6. A miniature circuit breaker for a low voltage power system according to claim 5, wherein: the right spring piece (2) and the left spring piece (3) are provided with bosses (15) at equal intervals, and the bosses (15) are matched with the breaker body (6).

7. A miniature circuit breaker for a low voltage power system according to claim 6, wherein: the connecting assembly comprises a common point (11), a normally closed point (12) in a breaker opening state and a normally closed point (14) in a breaker closing state, which are sequentially arranged on an external plug wire terminal (8).