... Over, under, window trig, ROC trig; Harmonic, single phase P,Q, 3 phases P,Q, frequency, Positive ... Negative sequence voltage, Zero sequence voltage, difference of phase angle etc. Protection relay trig type:Generator percentage ... abnormal relayGenerator stator over voltage relayTransformer differential relayTransformer r winding protection relayTransformer zero sequence differential relayTransformer ...