Apparatus and method for detecting wrong wiring of watt-hour meter

The invention O connection of the power meter sensors and relates to the method, a detector for detecting the voltage and current signals from the three-phase three-wire power meter; Calculation unit for calculating the active and reactive energy, and phase sangbyeol phase angle based on the voltage and current signal; And active energy, sangbyeol wiring phase error detecting an erroneous connection of the power meter a current occurrence, duration and phase average power factor based on the phase difference when the angle, the non-metering detector; and a.