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1. (WO2018101053) ELECTRICITY LEAKAGE DETECTION DEVICE

Pub. No.:    WO/2018/101053    International Application No.:    PCT/JP2017/041191
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Fri Nov 17 00:59:59 CET 2017
IPC: G01R 31/02
Applicants: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
パナソニックIPマネジメント株式会社
Inventors: IKUSHIMA, Tsuyoshi
生島 剛
NISHIGAKI, Tomokazu
西垣 朋一
FUKUO, Naoki
福尾 尚紀
Title: ELECTRICITY LEAKAGE DETECTION DEVICE
Abstract:
The present invention addresses the problem of providing an electricity leakage detection device whereby enhanced detection precision can be obtained. A first determination unit (16) of an alternating-current electricity leakage detection unit (1) outputs a first output signal corresponding to a magnitude relation between a first threshold value and a corrected first voltage signal outputted from a correction unit (14). An excitation unit (23) of a direct-current electricity leakage detection unit (2) applies an excitation voltage having an excitation frequency to an excitation coil (22). A direct-current-component detection unit (25) outputs a second voltage signal corresponding to the magnitude of a direct-current component of a voltage converted by an electric current detection resistance (24). A second determination unit (26) outputs a second output signal corresponding to a magnitude relation between a second threshold value and the second voltage signal outputted from the direct-current-component detection unit (25). A direct-current electricity leakage detection unit (2) is provided with a low-pass filter (27). The low-pass filter (27) is provided between the excitation coil (22) and an input terminal to which a junction of the excitation coil (22) and the electric current detection resistance (24) is electrically connected in the excitation unit (23).