Overcurrent and directional overcurrent protection (definite/inverse/user-defined)
Sensitive and directional earth-fault detection
Displacement voltage and intermittent earth-fault protection
High-impedance restricted earth fault
Motor protection and overload protection
Temperature and inrush monitoring
Under-/overvoltage and frequency protection
Rate-of-frequency-change and power protection (reverse, factor)
Reactive power protection under undervoltage
Breaker failure and negative-sequence protection
Phase-sequence monitoring, synchro-check, auto-reclosure, fault locator, lockout
Control/Logic:
Control of circuit breaker and isolators
Display of switching positions on graphic display
Operation via keyboard, binary inputs, DIGSI 4, or SCADA
User-defined automation via CFC
Monitoring Functions:
Measurement of voltage, current, and frequency
Energy metering (active/reactive power)
Breaker wear and trip circuit supervision
Fuse failure monitoring
Oscillographic fault recording (8 records)
Motor statistics
Communication Interfaces:
IEC 60870-5-103 / IEC 61850
PROFIBUS-FMS/-DP
DNP 3.0 / MODBUS RTU
DIGSI 4 front/service interface (modem)
Time sync: IRIG-B / DCF77
Hardware:
4 current transformer inputs
3/4 voltage transformer inputs
8/11 binary inputs
8/6 output relays
Stator earth-fault and overload protection
Directional and inverse-time overcurrent protection
Over/undervoltage and over/underfrequency protection
Reverse power and overexcitation protection
Forward power, underexcitation, and negative-sequence protection
Breaker failure and inadvertent energization protection
100% stator earth-fault protection with 3rd harmonic
Impedance and motor protection functions
Communication interfaces: IEC 60870-5-103, PROFIBUS-DP, MODBUS RTU, DNP 3.0
Monitoring: trip circuit, fuse failure, self-supervision, oscillographic fault records
Programmable logic (CFC) and DIGSI 4 engineering compatibility
