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Title:
SWITCHING APPARATUS FOR RESIDUAL CURRENT CIRCUIT BREAKER
Document Type and Number:
WIPO Patent Application WO/2017/215509
Kind Code:
A1
Abstract:
A switching apparatus for a residual-current circuit breaker, comprising: an A-type residual-current detection drive circuit (102), a B-type residual-current detection drive circuit (104), a switching power supply (106), a trip execution circuit (108) and a drive-switching circuit (110), wherein the B-type residual-current detection drive circuit is powered by the switching power supply. The drive-switching circuit detects a power supply voltage of the switching power supply. When the drive-switching circuit detects the power supply voltage, the drive-switching circuit turns on the B-type residual-current detection drive circuit and the trip execution circuit, and the B-type residual-current detection drive circuit drives the trip execution circuit. When the drive-switching circuit does not detect a power supply voltage, the drive-switching circuit turns on the A-type residual-current detection drive circuit and the trip execution circuit, and the A-type residual-current detection drive circuit drives the trip execution circuit. The apparatus may switch between the A-type residual-current detection drive circuit and the B-type residual-current detection drive circuit, according to whether or not a power supply voltage exists, and thus may avoid an occurrence of a false tripping.

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Inventors:
CHEN YONGLIANG (CN)
GE WEIJUN (CN)
XU LEI (CN)
FU HUA (CN)
Application Number:
PCT/CN2017/087566
Publication Date:
December 21, 2017
Filing Date:
June 08, 2017
Export Citation:
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Assignee:
SEARI ELECTRIC TECHNOLOGY CO LTD (CN)
ZHEJIANG CHINT ELECTRICS CO LTD (CN)
International Classes:
H02H9/02
Foreign References:
CN105914723A2016-08-31
CN205863908U2017-01-04
CN104795790A2015-07-22
CN104659742A2015-05-27
CN203352135U2013-12-18
CN104934931A2015-09-23
EP0797282A21997-09-24
Other References:
See also references of EP 3471229A4
Attorney, Agent or Firm:
SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)
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