CN-122029630-A - Circuit breaker for wiring

Abstract

The invention discloses a circuit breaker for wiring. The circuit breaker for wiring maintains voltage-withstand performance even when an arc is generated when a fault current is cut off. The circuit breaker for wiring according to an embodiment of the present invention includes a case, a plurality of base units accommodated in the case, and a reinforcing member. The reinforcing member is disposed on the base assembly. And, the base assembly has a base cover having a space formed therein to accommodate the fixed contact, the movable contact, and the arc extinguishing portion. A reinforcing member accommodating portion accommodating the reinforcing member is formed at the base cover.

Inventors

• JIN ZHENYUAN

Assignees

• LS电气株式会社

Dates

Publication Date

20260512

Application Date

20240920

Priority Date

20231018

Claims (20)

1. 1. A circuit breaker for wiring, comprising: A housing; A plurality of base components accommodated in the shell and A reinforcing member disposed on 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 reinforcing member accommodating portion accommodating the reinforcing member is formed at the base cover.
2. 2. The circuit breaker for wiring according to claim 1, wherein, The reinforcing member receiving part is formed in a groove shape recessed from the bottom surface of the base cover toward the top surface.
3. 3. The circuit breaker for wiring according to claim 1, wherein, The base cover comprises a first base cover and a second base cover combined with the first base cover; the reinforcement member receiving part is formed at the first and second base covers; The reinforcement member receiving part is formed if the first base cover and the second base cover are combined.
4. 4. The circuit breaker for wiring according to claim 3, wherein, The reinforcing member accommodating portion includes: A first reinforcing member receiving part formed at an end of the bottom surface of the first base cover, and A second reinforcing member receiving part formed at an end of a bottom surface of the second base cover; one of the reinforcement member accommodation portions is formed by a combination of the first reinforcement member accommodation portion and the second reinforcement member accommodation portion; the first reinforcing member accommodating portion is formed to be recessed from the bottom surface of the first base cover to the top surface by a predetermined depth, and the second reinforcing member accommodating portion is formed to be recessed from the bottom surface of the second base cover to the top surface by a predetermined depth.
5. 5. The circuit breaker for wiring according to claim 3, wherein, The reinforcing member accommodating portion includes: A first reinforcing member receiving part formed at a side surface of an end of a bottom surface of the first base cover, and A second reinforcing member accommodating part formed on a side surface of an end of the bottom surface of the second base cover, opposite to the first reinforcing member accommodating part; one of the reinforcement member accommodation portions is formed by a combination of the first reinforcement member accommodation portion and the second reinforcement member accommodation portion; The first reinforcement member receiving portion is formed to be recessed from a side surface of an end portion of the bottom surface of the first base cover by a predetermined depth in one direction, and the second reinforcement member receiving portion is formed to be recessed from a side surface of an end portion of the bottom surface of the second base cover by a predetermined depth in an opposite direction to the one direction.
6. 6. The circuit breaker for wiring according to claim 5, wherein, The first reinforcing member receiving part is formed along an end of the bottom surface of the first base cover; the second reinforcing member receiving part is formed along an end of the bottom surface of the second base cover.
7. 7. The circuit breaker for wiring according to claim 6, wherein, The reinforcing member is formed in a shape corresponding to the reinforcing member accommodating part.
8. 8. The circuit breaker for wiring according to claim 1, wherein, The reinforcing member is formed in a shape corresponding to the shape of the reinforcing member accommodating portion.
9. 9. The circuit breaker for wiring according to claim 8, wherein, The reinforcing member is formed in a bar shape having a predetermined length in one direction; The reinforcing member accommodating portion is formed in a groove shape having a predetermined length corresponding to the shape of the reinforcing member.
10. 10. The circuit breaker for wiring according to claim 8, wherein, The reinforcing member is formed in a plate shape having a predetermined thickness and a square or rectangular planar shape; the reinforcing member receiving part is formed in a groove shape having a predetermined depth and a square or rectangular planar shape.
11. 11. The circuit breaker for wiring according to claim 1, wherein, The reinforcing member receiving portion corresponds to a partial region in the bottom surface of the base cover, which is a flat bottom surface without a bent portion, a groove, or a step in the bottom surface of the base cover.
12. 12. The circuit breaker for wiring according to claim 11, wherein, The predetermined width and length of the reinforcing member are the same as the predetermined width and length of the reinforcing member accommodating portion.
13. 13. The circuit breaker for wiring according to claim 1, wherein, The reinforcement member receiving part is formed inside the bottom surface of the base cover.
14. 14. The circuit breaker for wiring according to claim 1, wherein, The reinforcing member is attached to the reinforcing member accommodating portion by an adhesive.
15. 15. A circuit breaker for wiring, comprising: A housing; A plurality of base components accommodated in the shell and A reinforcing member disposed on 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; the base cover comprises a first base cover and a second base cover combined with the first base cover; the reinforcement member is disposed between an end of the bottom surface of the first base cover and an end of the bottom surface of the second base cover.
16. 16. The circuit breaker for wiring according to claim 15, wherein, The shape of the reinforcing member in the longitudinal direction corresponds to the shape of the bottom surface of the base cover in the longitudinal direction.
17. 17. The circuit breaker for wiring according to claim 16, wherein, The reinforcing member includes a first groove and a second groove; The first groove and the second groove are formed on the outer surface of the reinforcing member in the length direction of the reinforcing member; The first groove and the second groove are formed in groove shapes recessed toward each other.
18. 18. The circuit breaker for wiring according to claim 17, wherein, The end of the bottom surface of the first base cover is inserted into and configured in the first groove; The end of the bottom surface of the second base cover is inserted into and disposed in the second groove.
19. 19. The circuit breaker for wiring according to claim 15, wherein, The reinforcing member is attached to an end of the bottom surface of the first base cover and an end of the bottom surface of the second base cover by an adhesive.
20. 20. The circuit breaker for wiring according to claim 1 or 15, wherein, The reinforcing member is formed of or includes melamine resin.

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 (fault current), flows, the fixed contact and the movable contact are in contact with each other, so that electricity can be supplied. 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. The high-temperature, high-voltage arc generated when the abnormal current is cut off generates oxides inside the base cover and also generates gaps in the base cover. The oxide flows out of the slit and flows into the inside of the casing of the circuit breaker for wiring. The oxide contaminates the inside of the case and reduces the insulating property of the case. In order to prevent contamination by oxides and the like, U.S. patent publication No. 2013-033474 discloses that two members (pieces) forming an arc chute housing (interrupter housing) are fastened with bolts and nuts, and an adhesive is used on the outer surfaces of the two members. However, U.S. publication No. 2013-033474 does not disclose a component capable of filling the gap of the base cover other than an adhesive. Therefore, a component capable of keeping the insulation performance and the voltage withstand performance of the circuit breaker for wiring constant is required. Disclosure of Invention Problems to be solved The invention provides a wiring circuit breaker which keeps insulation performance and voltage resistance constant. 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 units accommodated in the case, and a reinforcing member. The reinforcing member is disposed on the base assembly. And, the base assembly has a base cover having a space formed therein to accommodate the fixed contact, the movable contact, and the arc extinguishing portion. A reinforcing member accommodating portion accommodating the reinforcing member is formed at the base cover. Specifically, the reinforcing member accommodating portion is formed in a groove shape recessed from the bottom surface toward the top surface of the base cover. Specifically, the base cover includes a first base cover and a second base cover coupled to the first base cover. The reinforcement member receiving part is formed at the first and second base covers. If the first base cover and the second base cover are combined, a reinforcing member receiving part is formed. Specifically, the reinforcement member receiving part includes a first reinforcement member receiving part formed at an end of the bottom surface of the first base cover and a second reinforcement member receiving part formed at an end of the bottom surface of the second base cover. One reinforcing member receiving portion is formed by a combination of the first reinforcing member receiving portion and the second reinforcing member receiving portion. The first reinforcing member accommodating portion is formed to be recessed from the bottom surface of the first base cover to the top surface by a predetermined depth, and the second reinforcing member accommodating portion is formed to be recessed from the bottom surface of the second base cover to the top surface by a predetermined depth. Specifically, the reinforcement member housing portion includes a first reinforcement member housing portion formed on a side surface of an end portion of a bottom surface of the first base cover, and a second reinforcement member housing portion formed on a side surface of an end portion of a bottom surface of the second base cover, opposite to the first reinforcement member housing portion. One reinforcing member receiving portion is formed by a combination of the first reinforcing member receiving portion and the second reinforcing member receiving portion. The first reinforcing member accommodating portion is formed to be recessed from a si