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Reply To: Protection Riddle No.13 – Setting of earth fault relay

#1303
AMIR KHASHAYAR

    For setting of relay 8.67 Amp. is correct . In fact 12.5 Amp. consists of two components resistive and capacitive . 12.5 Amp. is 8.67 *1.44 (root of 2) . 8.67 passes the earthing resistance or earthing transformer and initiates the relay and this is correct for setting of relay.