POWER QUALITY RECOVERY RELAY

摘要

The present invention relates to a power quality recovering relay which has a purpose to recover the quality of power to normal power which has been degraded due to an open-phase of a power line/reverse phase of the power line/open-phase of a neutral line/voltage imbalance and current imbalance, unbalanced overvoltage, unbalanced overcurrent, and increased zero-phase harmonic waves. The power quality recovering relay of the present invention connects to a power supply device which supplies power through a distribution system, and includes a control unit which outputs a control signal to operate a switch connected to the power line in order to recover the open phase and the reverse phase to the normal when the open-phase and reverse-phase states are detected.