Principle of Operation:
The R,Y and B-Phase line current input to relay is derived from the line CT. The R,Y and B line voltage scaled to relay rated voltage using transformers. The relay measures the phase angle between R,Y and B phase Current and R,Y and B phase voltage, the output contact operates when PF reaches lead condition after fixed operating time of 60s. The output contact release when PF reaches lag condition after fixed operating delay delay of 60s.
The aux supply is required to power up the unit.
The relay displays power factor, and lag indication.
