ELECTRONIC WATT-HOUR METER

摘要

PROBLEM TO BE SOLVED: To provide an electronic watt-hour meter capable of simply confirming the connection state. SOLUTION: This meter is equipped with a voltage phase sequence detection part 20 for detecting the phase sequence of a voltage of a multiphase power supplied from the outside, a control part 7 for determining whether the phase sequence of the voltage of the multiphase power supplied from the outside is a positive phase sequence or a negative phase sequence based on the phase sequence detected by the voltage phase sequence detection part 20, a display part 13 for displaying information for showing the positive phase sequence or the negative phase sequence based on the determination result by the control part 7, and a communication part 12 for transmitting to the outside the information for showing the positive phase sequence or the negative phase sequence based on the determination result by the control part 7. COPYRIGHT: (C)2004,JPO