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1. (WO2018205499) ARC EXTINGUISHING DEVICE AND CIRCUIT BREAKER USING THE ARC EXTINGUISHING DEVICE

Pub. No.:    WO/2018/205499    International Application No.:    PCT/CN2017/106388
Publication Date: Fri Nov 16 00:59:59 CET 2018 International Filing Date: Tue Oct 17 01:59:59 CEST 2017
IPC: H01H 9/36
Applicants: PINGGAO GROUP CO., LTD.
平高集团有限公司
STATE GRID CORPORATION OF CHINA
国家电网公司
Inventors: WANG, Haiyan
王海燕
ZHU, Zhihao
朱志豪
YUAN, Duanlei
袁端磊
ZHAO, Fangshuai
赵芳帅
FEI, Xiang
费翔
SHA, Yunpeng
沙云鹏
LU, Liuyang
卢留洋
ZUO, Zhihua
左智华
XU, Minghui
徐铭辉
Title: ARC EXTINGUISHING DEVICE AND CIRCUIT BREAKER USING THE ARC EXTINGUISHING DEVICE
Abstract:
The present invention relates to an arc extinguishing device and a circuit breaker using the arc extinguishing device. The arc extinguishing device comprises at least two arc extinguishing grid plates which are provided at intervals in parallel along the longitudinal direction. The dimension of at least one of the arc extinguishing grid plates in the height direction is greater than the dimension of an adjacent arc extinguishing grid plate, on at least one side thereof, in the height direction. By means of such a structure, the electric arc directed from the circuit breaker to the arc distinguishing device is rapidly elongated in the arc extinguishing grid plate, and is cut by the arc extinguishing grid plate to form a plurality of short electric arcs. The arc extinguishing grid plate, which has smaller dimension in the height direction, can limit the height and make the arc not too high, and thus the electric arc is concentrated within the height range of small arc extinguishing grid plates, thereby facilitating the control and cutting of the electric arc; and a large dimensioned metal grid plate is favorable to the heat dissipation of the electric arc.