Title:
EARTH LEAKAGE CIRCUIT BREAKER
Document Type and Number:
WIPO Patent Application WO/2019/190018
Kind Code:
A1
Abstract:
The objective of the present invention is to provide an earth leakage circuit breaker which is capable of reliably detecting a leakage current of an alternating current component in a circuit as well as a leakage current of a pulsating direct current component and capable of blocking the circuit in response to the leakage current. The earth leakage circuit breaker according to the present invention comprises: a leakage current detection unit for outputting a leakage current detection signal according to the leakage current from a circuit; a conversion unit for outputting the leakage current magnitude of a fundamental wave component, a ratio of a third harmonic component, and a ratio of a positive pole peak current value to a negative pole peak current value, on the basis of the leakage current detection signal outputted from the current detection unit; and a control unit for comparing the leakage current magnitude of a fundamental wave component, the ratio of a third harmonic component, and the ratio of a positive pole peak current value to a negative pole peak current value, outputted by the conversion unit, with predetermined reference values to determine whether or not a leakage current of the alternating current component is generated or a leakage current of the direct current component is generated and to thereby output a trip control signal when it is determined that the leakage current of the direct current or alternating current component is generated.
Inventors:
YOON JAESHIK (KR)
YU JAEYOUNG (KR)
JUNG HYUNYOUNG (KR)
YU JAEYOUNG (KR)
JUNG HYUNYOUNG (KR)
Application Number:
PCT/KR2018/014327
Publication Date:
October 03, 2019
Filing Date:
November 21, 2018
Export Citation:
Assignee:
LSIS CO LTD (KR)
International Classes:
H01H83/02; G01R19/165; G01R19/25; G01R31/02
Foreign References:
| JPH07312823A | 1995-11-28 | |||
| KR20030028670A | 2003-04-10 | |||
| JP2016144297A | 2016-08-08 | |||
| JP2017200255A | 2017-11-02 | |||
| KR940017031A | 1994-07-25 | |||
| KR101616797B1 | 2016-04-29 |
Other References:
See also references of EP 3780061A4
Attorney, Agent or Firm:
PARK, Jang-Won (KR)
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