WATT-HOUR-METER AND DETECTION METHOD FOR ABNORMAL STATUS THEREOF

摘要

The present invention relates to a watt-hour-meter and a detection method for an abnormal status of the same to detect an abnormal status of a watt-hour-meter including electrical conduction and an electrical short through the vector synthesis of a three-phase current. The watt-hour-meter according to the present invention includes a sensing part for sensing the current of AC power; an abnormal status detection part for detecting an abnormal status by vector-synthesizing the current value of the AC power detected by the sensing part; and a control part for controlling the display of the abnormal status based on the detection result of the abnormal status detection part. [Reference numerals] (110) Voltage sensing part; (120) Current sensing part; (130) Power calculating part; (140) Abnormality detecting part; (150) Control part; (160) Display part; (AA) Load