Title:
A leak sensing device, a short circuit detecting method, and a program
Document Type and Number:
Japanese Patent JP6061884
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To accurately detect electric leakage caused by a tracking phenomenon by simple processing.SOLUTION: A leakage detection unit 107 determines occurrence of a leakage caused by a tracking phenomenon if a first index value exceeds a first threshold, the first index value being based on current values sampled in a first period having a length corresponding to a period of an AC current and current values sampled in a second period prior to the first period by as much as the period of the AC current, if a second index value exceeds a second threshold, the second index value being based on current values sampled in a first half period of the first period and current values sampled in a second half period of the first period, if a third index value exceeds a third threshold, the third index value being based on the current values sampled in the first period and current values sampled in a third period prior to the second period by as much as a natural number multiple of the period of the AC current.
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Inventors:
Toshiyasu Hikuma
Makoto Katsukura
Ogawa Yuuki
Makoto Katsukura
Ogawa Yuuki
Application Number:
JP2014038769A
Publication Date:
January 18, 2017
Filing Date:
February 28, 2014
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
G01R31/02; G01R31/12
Domestic Patent References:
| JP2002354656A | ||||
| JP200214136A |
Attorney, Agent or Firm:
Kimura Mitsuru
Koji Yashima
Mie Hideki
Koji Yashima
Mie Hideki