Title:
CIRCUIT BREAKER
Document Type and Number:
WIPO Patent Application WO/2021/104065
Kind Code:
A1
Abstract:
A circuit breaker, comprising a housing assembly, and a contact system, an electric leakage protection mechanism and an electric leakage test mechanism arranged inside the housing assembly. The contact system comprises a handle (21), a contact terminal mechanism and an operation mechanism (23). When the circuit breaker is switched on or switched off, the operation mechanism (23) is driven by means of the handle (21) to close or cut off the contact terminal mechanism. The electric leakage test mechanism comprises an electric leakage test button (50), and an electric leakage test loop cooperating with a zero-sequence current transformer (41) of the electric leakage protection mechanism. The electric leakage test loop comprises a first test contact point (T1) cooperating with the electric leakage test button (50), and a second test contact point (T2) cooperating with the contact system, wherein the second test contact point remains closed, and the contact system cuts off the second test contact point (T2) when the circuit breaker is switched off; and the contact system avoids the second test contact point (T2) when the circuit breaker is switched on, such that the second test contact point (T2) is reset and remains closed. Therefore, contact terminal parameters of the contact terminal mechanism are not affected, thereby ensuring the contact terminal pressure of the contact terminal mechanism during switching on thereof.
Inventors:
TU BING (CN)
ZHU JUN (CN)
LI LUOBIN (CN)
ZHU JUN (CN)
LI LUOBIN (CN)
Application Number:
PCT/CN2020/128888
Publication Date:
June 03, 2021
Filing Date:
November 15, 2020
Export Citation:
Assignee:
ZHEJIANG CHINT ELECTRICS CO LTD (CN)
International Classes:
H01H83/04; H01H71/02; H01H71/08; H01H73/04
Foreign References:
| CN209544274U | 2019-10-25 | |||
| CN207883638U | 2018-09-18 | |||
| CN207852601U | 2018-09-11 | |||
| JP2014164799A | 2014-09-08 | |||
| KR102011273B1 | 2019-10-21 |
Other References:
See also references of EP 4068328A4
Attorney, Agent or Firm:
BEIJING JOYAN INTELLECTUAL PROPERTY OFFICE (CN)
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