رله حفاظتی زیمنس مدل 7SA641.-…..-7PR4

DISTANCE PROTECTION RELAY 7SA64 UNITS WITH DETACHED OPERATOR UNIT, BACK-LIT GRAPHIC DISPLAY FOR SINGLE-LINE DIAGRAM, CONTROL KEYS, KEY-OPERATED SWITCH, FUNCTION KEYS, NUMERICAL KEYS PC-INTERFACE, TRIPPING 3-POLE, 1-/3POLE TRIP MODE, PICKUP I>, PICKUP V</I>/ PICKUP Z< (POLYGON), V</I>/PHI POWER SWING DETECTION, PARALLEL LINE COMPENSATION, AUTO-RECLOSURE, SYNCHRO-CHECK BREAKER-FAILURE PROTECTION, VOLTAGE PROTECTION, EARTH-FAULT PROTECTION DIRECTIONAL FOR EARTHED NETWORKS,OVERLOAD PROT.