Harmonic signal generator and specific electrical equipment of the operating state estimation method and system as well as the safety confirmation method and system of power customers resident using this

摘要

PROBLEM TO BE SOLVED: To generate a characteristic harmonic current on a feeder line as a specific electric apparatus, of which operational condition is estimated, is operation.;SOLUTION: The harmonic signal generator 6 generates a harmonic current having features not possessed by a harmonic current being generated from an electric apparatus in an electric power consumer on a feeder line by interrupting a current being fed from the feeder line of an indoor wiring circuit 17 to a specific electric apparatus 3f during operation thereof for a predetermined time interval every predetermined time.;COPYRIGHT: (C)2005,JPO&NCIPI