Arc extinguishing system of circuit breaker and circuit breaker

• Main Authors: DING GUOHUI, RUI XIAOLIN, ZHOU JIANYONG, LI YANFENG, SHI JIANXUAN, LIU LEBIN
• Format: Patent
• Language: Chinese; English
• Published: 17.01.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SWITCHES; ELECTRICITY; EMERGENCY PROTECTIVE DEVICES; RELAYS; SELECTORS

The utility model provides an arc extinguishing system of a circuit breaker and the circuit breaker, and relates to the technical field of circuit breakers, the arc extinguishing system of the circuit breaker comprises an arc extinguishing chamber, a static contact and a moving contact, an arc extinguishing grid sheet is arranged in the arc extinguishing chamber, the end portion of the moving contact is arranged in the arc extinguishing chamber, an arc extinguishing chamber cover is arranged in the arc extinguishing chamber, and an upper arc striking sheet is arranged in the arc extinguishing chamber. And the upper arc striking sheet is obliquely arranged. By adding the arc extinguish chamber cover, the problems of moving contact deformation and overtravel reduction caused by electric repulsive force are solved, meanwhile, the gas pressure is increased, electric arcs can enter the arc extinguish chamber more quickly, and generated metal particles are effectively prevented from entering the rear portion of the