LEAKAGE DETECTOR OF LOW VOLTAGE POWER DISTRIBUTION SYSTEM

摘要

PROBLEM TO BE SOLVED: To detect a leakage spot in a low voltage power distribution system with less trouble in a shorter time by using a method simpler than a conventional method.SOLUTION: A leakage detector 20 (multifunction wattmeter) includes a zero-phase current transformer 35, a bleeder 38, a control unit 28, and a communication terminal 29. The bleeder 38 detects a voltage of a neutral line 11n against a remote ground pole. The control unit 28 determines the presence/absence of a leakage from a distribution line and in a demander facility based on the voltage of the neutral line 11n. The control unit 28 also determines the presence/absence of a leakage in a demander facility based on an AC zero-phase current detected by the zero-phase current transformer 35. The communication terminal 29 transmits a determination result given by the control unit 28 to a central device 40 via a communication transmission path 41 for a power distribution automatizing system.