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Protection and Control
Six-stage overcurrent protection. (67P, 50P/51P)
Six-stage neutral/ground overcurrent protection. (67G, 50/51G)
Four-stage sensitive earth fault protection. (67SG/51SG)
Two-stage undervoltage protection and two-stage over voltage protection. (27/59)
One-stage negative sequence overvoltage protection. (47)
Two-stage zero sequence overvoltage protection. (59G)
Four-stage under-frequency protection, four-stage over- frequency protection and four-stage rate-of-change of frequency (81)
Breaker failure protection. (50BF)
4-shot three-pole auto-reclosing with sync-check and dead line/bus check. (79/25)
Dead zone protection. (50DZ)
Negative sequence overcurrent protection (46)
Broken conductor detection. (46BC)
Thermal overload element. (49)
Undercurrent protection. (37)
Switch-onto-fault (SOTF) logic.
Cold load pickup logic (CLP)
Mechanical Protection
Interlocking logic for distribution busbar protection.
Remote and local tripping/closing of the breaker.
Interlocking logic of the breaker control.
Voltage and current drift auto adjustment.
Frequency tracking.
Fault locator.
