Title:
漏電検出装置
Document Type and Number:
Japanese Patent JP6725104
Kind Code:
B2
Abstract:
One embodiment provides an electric leakage detecting device for shutting off an AC electric circuit. A digital comparator generates a detection signal by comparing an output signal corresponding to output signals of a zero-phase current transformer with positive and negative thresholds, a control signal generator generates a control signal based on the detection signal, and a judging device generates a judgment signal if an electric leakage state is judged. In addition, a delay counter generates a final control signal if the judgment signal has been received continuously more than a first prescribed time, a reset counter resets every time the control signal is received, and resets the judging device and the delay counter if the control signal is not received in a second prescribed time, and a switch driving circuit shuts off the AC electric circuit based on the final control signal.
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Inventors:
Onishi
Application Number:
JP2016074850A
Publication Date:
July 15, 2020
Filing Date:
April 04, 2016
Export Citation:
Assignee:
New Japan Radio Co., Ltd.
International Classes:
H02H3/16; H01H83/02; H02H3/027
Domestic Patent References:
| JP6133448A | ||||
| JP2012199196A | ||||
| JP2002078189A | ||||
| JP5218876A | ||||
| JP2003219552A | ||||
| JP2017093237A | ||||
| JP2010500864A | ||||
| JP1110018A |
Foreign References:
| US20160315462 | ||||
| EP2955835A1 |