Over-voltage protection relay PCS-9611S

under-voltageover-currentunder-current

PCS-9611S relay is a protection, control and monitoring unit for various primary equipments (such as overhead line, underground cable and transformer etc.) on solidly grounded, impedance grounded, Peterson coil grounded and ungrounded system. • Six-stage phase overcurrent protection (50/51P, 67P) • Zero sequence overcurrent protection (50/51G, 67G) • Sensitive earth fault protection (51SEF, 67SEF) • Negative sequence overcurrent protection (50/51Q) • Switch onto fault protection (SOTF) • Undercurrent protection (37) • Cold load pickup logic (CLP) • Undervoltage protection (27P) • Overvoltage protection (59P) • Zero sequence overvoltage protection (59G) • Negative sequence overvoltage protection (59Q) • Unbalance current/voltage protection (60C/V) • Reverse power protection (32R) • Under-frequency protection (81U) • Over-frequency protection (81O) • Frequency rate-of-change protection (81R) • Automatic reclosing (79) • Manual closing function