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1. (WO2018034260) OPEN PHASE DETECTING SYSTEM, OPEN PHASE DETECTING DEVICE AND OPEN PHASE DETECTING METHOD

Pub. No.:    WO/2018/034260    International Application No.:    PCT/JP2017/029258
Publication Date: Fri Feb 23 00:59:59 CET 2018 International Filing Date: Tue Aug 15 01:59:59 CEST 2017
IPC: G01R 29/18
G01R 31/02
H02H 3/34
Applicants: KABUSHIKI KAISHA TOSHIBA
株式会社 東芝
TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION
東芝エネルギーシステムズ株式会社
Inventors: TAKAHASHI Masao
高橋 正雄
TANAKA Yuudai
田中 雄大
MIURA Shogo
三浦 祥吾
MAEJIMA Hiroyuki
前嶋 宏行
Title: OPEN PHASE DETECTING SYSTEM, OPEN PHASE DETECTING DEVICE AND OPEN PHASE DETECTING METHOD
Abstract:
An open phase detecting system of an embodiment is provided with: a three-phase stationary induction electric device (1); a current detector (5); an extracting unit (62); and a determining unit (67). The three-phase stationary induction electric device (1) has a primary circuit in which an excitation current flows through three phase wires. The current detector detects, for each wire, the excitation current flowing through each wire of the primary circuit. The extracting unit extracts a high frequency from the excitation current of the wire, which is detected by the current detector. On the basis of whether the high frequency is extracted by the extracting unit, the determining unit determines whether the wire of a detection source of the excitation current is in an open state or a connected state.