Title:
The short circuit decision circuit for earth leakage breakers
Document Type and Number:
Japanese Patent JP6073420
Kind Code:
B2
Abstract:
An electric leakage determination circuit for an electric leakage circuit breaker according to the invention comprises a zero current transformer on an alternating-current circuit to provide an electric leakage detection signal upon occurrence of electric leakage, a filter circuit unit connected to an output terminal of the zero current transformer to remove noise, and an electric leakage determination circuit unit comparing a voltage value of the electric leakage detection signal with a first reference voltage value, to be charged with electric charges when the voltage value is not smaller than the first reference voltage value and discharge electric charges when being smaller than the first reference voltage value, and comparing a charged voltage value with a second reference voltage value to determine occurrence of electric leakage when the charged voltage value is not smaller than the second reference voltage value.
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Inventors:
Kim Tong Hyun
Song Jung Kuk
Jeong Cher-ho
Song Jung Kuk
Jeong Cher-ho
Application Number:
JP2015135073A
Publication Date:
February 01, 2017
Filing Date:
July 06, 2015
Export Citation:
Assignee:
LSIS CO.,LTD.
International Classes:
H02H3/33; G01R31/02; H01H83/02
Domestic Patent References:
| JP3265421A | ||||
| JP10094161A | ||||
| JP2010272523A | ||||
| JP7046749A |
Attorney, Agent or Firm:
Atsushi Aoki
Jun Tsuruta
Tomohiro Minamiyama
Akira Kawai
Kenichi Nakamura
Yuya Kuroda
Jun Tsuruta
Tomohiro Minamiyama
Akira Kawai
Kenichi Nakamura
Yuya Kuroda
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