Cabinet panel of built-in neutral line protection function

PURPOSE: A distributing board including a neutral wire protection function is provided to maintain a normal voltage by preventing an overvoltage generated by voltage imbalance. CONSTITUTION: A power supply device(100) includes a main circuit breaker(101) and a power distribution breaker(MccB). A neutral wire restoring device(200) is connected with a power supply device. The neutral wire restoring device operates a zig-zag transformer to reduce an image harmonic. The neutral wire restoring device senses the image formation of the power supply device. The neutral wire restoring device connects an end of an inductance with a neutral wire for restoration in order to prevent an overvoltage through the restoration of the neutral wire. The neutral wire restoring device includes a neutral wire restoring unit(240). The neutral wire restoring device includes a first switch, a second switch, and the zig-zag transformer. [Reference numerals] (210) Open phase detector; (220) Current detector; (230) Controller; (240) Neutral wire restoring unit; (250) Alarm generator; (260) Alarm release signal input unit