Protection Functions:
Distance protection with 6 measuring systems (21/21N)
High resistance ground-fault protection (50N, 51N, 67N)
Tele (pilot) protection (85)
Fault locator (FL)
Power swing detection/tripping (68/68T)
Phase overcurrent protection (50/51)
STUB bus overcurrent (50STUB)
Switch-onto-fault (50HS)
Over/undervoltage (59/27)
Over/underfrequency (81O/U)
Auto-reclosure (79)
Synchro-check (25)
Breaker failure protection (50BF)
Control Functions:
Command control for circuit breakers and isolators
Monitoring Functions:
Trip circuit supervision (74TC)
Relay self-supervision
Measured-value supervision
Event/fault logging
Oscillographic fault recording
Switching statistics
Front Design:
Numeric keypad for easy local operation
Alarm LEDs
PC front port for configuration
Function keys
Communication Interfaces:
Front interface for PC connection
System interface: IEC 61850 / IEC 60870-5-103 / PROFIBUS-FMS/DP / DNP 3.0
2 serial data interfaces for pilot protection
Rear modem/service interface
Time sync via IRIG-B, DCF77, or system interface
Hardware:
Binary inputs: 8 / 16 / 24
Output relays: 16 / 24 / 32
Optional high-speed trip outputs: 5
