Title:
CIRCUIT BREAKER
Document Type and Number:
WIPO Patent Application WO/2021/160179
Kind Code:
A1
Abstract:
A circuit breaker, comprising a residual current analysis and comparison circuit and an actuating mechanism. An electronic detection circuit, an electromagnetic residual current detection circuit, and a driving circuit are comprised; the electronic detection circuit comprises a working power supply and a detection circuit; the detection circuit comprises an electronic residual current detection circuit, a processing circuit, and a comparison circuit; the electronic residual current detection circuit acquires a fault signal and converts same into a sampled output signal; the processing circuit amplifies the received sampled output signal to form a preprocessed signal; the comparison circuit receives the preprocessed signal and compares same with a set threshold, and the comparison circuit outputs the fault signal and controls the driving circuit to make the actuating mechanism operate to trip the circuit breaker; the electromagnetic residual current detection circuit is used for an electromagnetic residual current fault monitor to monitor a circuit, and the electromagnetic residual current detection circuit makes the actuating mechanism operate to trip the circuit breaker. The circuit breaker in the present invention has two detection circuits that can work together and do not interfere with each other.
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Inventors:
ZHOU CHANGQING (CN)
LEI GUANG (CN)
GU XIANGYI (CN)
LEI GUANG (CN)
GU XIANGYI (CN)
Application Number:
PCT/CN2021/076632
Publication Date:
August 19, 2021
Filing Date:
February 12, 2021
Export Citation:
Assignee:
ZHEJIANG CHINT ELECTRICS CO LTD (CN)
International Classes:
H01H71/00; H01H71/02; H02H3/14; H02H3/32
Foreign References:
| CN205429697U | 2016-08-03 | |||
| CN204167871U | 2015-02-18 | |||
| CN205863908U | 2017-01-04 | |||
| CN110190581A | 2019-08-30 | |||
| EP3525227A1 | 2019-08-14 | |||
| US20020149462A1 | 2002-10-17 |
Attorney, Agent or Firm:
BEIJING JOYAN INTELLECTUAL PROPERTY OFFICE (CN)
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