رله حفاظتی زیمنس مدل 7SA611.-…..-7PR4

DISTANCE PROTECTION RELAY 7SA61 OPERATOR PANEL WITH: 4-LINE BACK-LIT DISPLAY, FUNCTION KEYS,NUMERICAL KEYS, PC-INTERFACE, TRIPPING 3-POLE TRIPPING 1/3-POLE 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 PROT. DIRECTIONAL FOR EARTHED NETWORKS OVERLOAD PROTECTION