Title:
EARTH LEAKAGE CIRCUIT BREAKER AND CONTROL METHOD OF SAME EARTH LEAKAGE CIRCUIT BREAKER
Document Type and Number:
WIPO Patent Application WO/2022/010066
Kind Code:
A1
Abstract:
The present invention relates to an earth leakage circuit breaker, and the earth leakage circuit breaker comprises: a current detection unit that detects a current flowing in a circuit; a trip unit that cuts off a connection between the circuit and a load when a trip control signal is received; a feature detection unit that detects a positive peak value, a negative peak value, an RMS value, a fundamental wave magnitude, and a third harmonic ratio from the current detected by the current detection unit, and calculates an average magnitude value for a preset period of one cycle; and a control unit that first determines the detected current as either a first leakage current having a preset waveform or a second leakage current having a waveform different from the preset waveform on the basis of a ratio of the detected peak values, and when it is determined that the detected current is the first leakage current as a result of the first determination, outputs the trip control signal to the trip unit on the basis of at least one of the RMS value, the third harmonic ratio, and the fundamental wave magnitude, and the average magnitude value.
Inventors:
LIM JONGUNG (KR)
Application Number:
PCT/KR2021/002879
Publication Date:
January 13, 2022
Filing Date:
March 09, 2021
Export Citation:
Assignee:
LS ELECTRIC CO LTD (KR)
International Classes:
H01H83/14; G01R31/52
Foreign References:
| KR102017805B1 | 2019-09-03 | |||
| KR20040072538A | 2004-08-18 | |||
| JPH07312823A | 1995-11-28 | |||
| JP2002199579A | 2002-07-12 | |||
| KR20160041868A | 2016-04-18 |
Attorney, Agent or Firm:
PARK, Jang-Won (KR)
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