CN-122029631-A - Circuit breaker for wiring

Abstract

The invention discloses a circuit breaker for wiring. The circuit breaker for wiring prevents the case from being broken by high-temperature and high-pressure arc. The circuit breaker for wiring according to an embodiment of the present invention includes a case, a plurality of base members, and a tightening member. The plurality of base components are accommodated in the shell. The tightening member is disposed between the housing and the base assembly. In addition, the base assembly has a base cover. The base cover is internally formed with a space to accommodate the fixed contact, the movable contact, and the arc extinguishing portion. A tightening member accommodating portion accommodating the tightening member is formed in the base cover.

Inventors

• JIN ZHENYUAN

Assignees

• LS电气株式会社

Dates

Publication Date

20260512

Application Date

20240920

Priority Date

20231020

Claims (17)

1. 1. A circuit breaker for wiring, comprising: A housing; A plurality of base components accommodated in the shell and A tightening member disposed between the housing and the base assembly; the base assembly is provided with a base cover, and a space is formed in the base cover to accommodate the fixed contact, the movable contact and the arc extinguishing part; a tightening member accommodating portion accommodating the tightening member is formed in the base cover.
2. 2. The circuit breaker for wiring according to claim 1, wherein, The tightening member includes a connection portion and tightening portions formed at both end portions of the connection portion; The tightening portion is formed to extend in a direction perpendicular to a longitudinal direction of the connecting portion.
3. 3. The circuit breaker for wiring according to claim 2, wherein, The connection part is formed in a plate shape and has a predetermined length in one direction; the connecting portion is disposed in the tightening member accommodating portion formed in the bottom surface of the base cover.
4. 4. The circuit breaker for wiring according to claim 3, wherein, A protrusion insertion hole penetrating the connection part is formed at the connection part.
5. 5. The circuit breaker for wiring according to claim 3, wherein, A protrusion insertion hole penetrating the connection part is formed at the connection part; a tightening member seating part, in which the tightening member is seated, is formed at the bottom of the housing; a guide protrusion formed to protrude a predetermined length from the top surface of the tightening member seating part is provided at the top surface; The guide projection is inserted into the projection insertion hole.
6. 6. The circuit breaker for wiring according to claim 2, wherein, The tightening part comprises a one-side tightening part and a other-side tightening part; the one-side tightening part is formed at one end of the connecting part, and the other-side tightening part is formed at the other end of the connecting part.
7. 7. The circuit breaker for wiring according to claim 6, wherein, The plurality of base assemblies comprise a first base assembly arranged on one side wall part side of the shell, a second base assembly arranged on one side of the first base assembly and a third base assembly arranged on the other side wall part side of the shell; The one-side tightening part is configured at a tightening member accommodating part formed at one side surface of a base cover of the first base assembly; the other side tightening part is disposed at a tightening member receiving part formed at one side of a base cover of the third base assembly.
8. 8. The circuit breaker for wiring according to claim 6, wherein, A first fixing protrusion protruding inward from an outer end of the one side tightening part is provided on an inner side surface of the one side tightening part; the second fixing protrusion protruding inward from the outer end of the other side tightening part is provided on the inner side surface of the other side tightening part.
9. 9. The circuit breaker for wiring according to claim 8, wherein, The first fixing protrusion is formed to be inclined downward from an outer side end of the one-side tightening part; The second fixing protrusion is formed to be inclined downward from an outer side end portion of the other side tightening part.
10. 10. The circuit breaker for wiring according to claim 2, wherein, The angle formed by the length direction of the connecting part and the length direction of the tightening part is 90 degrees or an acute angle.
11. 11. The circuit breaker for wiring according to claim 1, wherein, A tightening member seating portion, at which the tightening member is seated, is formed at the bottom of the housing.
12. 12. The circuit breaker for wiring according to claim 11, wherein, The tightening member seating portion is formed protruding from an inner surface of the bottom portion.
13. 13. The circuit breaker for wiring according to claim 11, wherein, A guide projection formed to project a predetermined length from the top surface is provided on the top surface of the tightening member seating portion.
14. 14. The circuit breaker for wiring according to claim 1, wherein, The tightening member receiving portion is formed at a bottom surface and a side surface of the base cover.
15. 15. The circuit breaker for wiring according to claim 14, wherein, The tightening member receiving portion formed at the bottom surface of the base cover and the tightening member receiving portion formed at one side surface of the base cover communicate with each other.
16. 16. The circuit breaker for wiring according to claim 1, wherein, The tightening member receiving portion is recessed from the bottom surface and one side surface of the base cover by a predetermined depth.
17. 17. The circuit breaker for wiring according to claim 1, wherein, The tightening member housing is coated with an adhesive made of silicon, and the tightening member is inserted into and fixed to the tightening member housing coated with the adhesive.

Description

Circuit breaker for wiring Technical Field The present invention relates to a circuit breaker for wiring. Background A circuit breaker for wiring (MCCB: molded Case Circuit Breaker) is an electrical device that cuts off power supply in order to prevent an electrical accident when an abnormal current such as leakage current or overcurrent occurs as one type of circuit breaker. A general circuit breaker for wiring includes a fixed contact and a movable contact inside. During a period in which a normal current, which is a non-abnormal current, flows, the fixed contact and the movable contact are in contact with each other, so that electricity can be conducted. If an abnormal current occurs, the fixed contact and the movable contact are separated, and the current is cut off. When the fixed contact and the movable contact are separated, an arc (arc) is generated by an abnormal current flowing through the fixed contact and the movable contact. The generated arc is discharged to the outside of the circuit breaker for wiring after the arc extinguishing (extinguish) process. The generated arc may be defined as a flow of high temperature, high voltage electrons. The heat and pressure generated inside the wiring breaker by the current interruption increase in proportion to the magnitude of the interrupted current. A Housing (Housing) of the circuit breaker for wiring (for example, a Case (Case)) may be broken due to a high-temperature and high-voltage arc generated inside the circuit breaker for wiring. If the cover is broken, the insulation performance of the cover is degraded. Japanese laid-open patent No. 2001-338565 discloses an attachment unit attached to a circuit breaker for the purpose of overcurrent protection of a circuit or a device and detecting an operation state thereof as an electric signal, but does not provide a means for preventing breakage of a cover by adding a mechanism element. Therefore, there is a need for a case of a circuit breaker for wiring that is not broken even when the case is subjected to high-temperature and high-pressure impact force. Disclosure of Invention Problems to be solved The invention provides a wiring circuit breaker which prevents a casing of the wiring circuit breaker from being damaged by high-temperature and high-pressure electric arcs. Technical proposal for solving the problems The above object of the present invention is achieved as follows. The circuit breaker for wiring according to an embodiment of the present invention includes a case, a plurality of base members, and a tightening member. The plurality of base components are accommodated in the shell. The tightening member is disposed between the housing and the base assembly. In addition, the base assembly has a base cover. The base cover is internally formed with a space to accommodate the fixed contact, the movable contact, and the arc extinguishing portion. A tightening member accommodating portion accommodating the tightening member is formed in the base cover. Specifically, the tightening member includes a connecting portion and tightening portions formed at both end portions of the connecting portion. The tightening portion is formed to extend in a direction perpendicular to a longitudinal direction of the connecting portion. Specifically, the connecting portion is formed in a plate shape and has a predetermined length in one direction, and is disposed in a tightening member accommodating portion formed in the bottom surface of the base cover. Specifically, a protruding portion insertion hole penetrating the connection portion is formed in the connection portion. Specifically, a tightening member seating portion for seating a tightening member is formed at the bottom of the housing. A guide projection formed to project a predetermined length from the top surface is provided on the top surface of the tightening member seating portion. The guide projection is inserted into the projection insertion hole. Specifically, the tightening part includes one side tightening part and the other side tightening part. The one-side tightening part is formed at one end of the connecting part, and the other-side tightening part is formed at the other end of the connecting part. Specifically, the plurality of base assemblies includes a first base assembly disposed on one side wall portion side of the housing, a second base assembly disposed on one side of the first base assembly, and a third base assembly disposed on the other side wall portion side of the housing. The one-side tightening part is disposed in a tightening member receiving part formed at one side surface of a base cover of the first base assembly. The other side tightening part is disposed in a tightening member receiving part formed at one side of the base cover of the third base assembly. Specifically, a first fixing projection formed to project inward from an outer end portion of the one-side tightening portion is provided on an inner side surface of the on