Protection Functions:
Overcurrent protection (definite/inverse/user-defined)
Directional overcurrent protection (definite/inverse/user-defined)
Sensitive/non-directional earth-fault detection
Displacement voltage, intermittent earth-fault protection
High-impedance restricted earth fault, inrush restraint
Motor protection, overload protection, temperature monitoring
Under-/overvoltage and frequency protection
Breaker failure, negative-sequence, and phase-sequence protection
Auto-reclosure, fault locator, lockout
Control & Logic:
Flexible number of switching devices
Switching element positions shown on graphical display
Local/remote switching via key-operated switch
Control via keyboard, binary inputs, DIGSI 4, or SCADA
Extended user-defined logic via CFC (e.g., interlocking)
Monitoring Functions:
Measurement of V, I, f
Energy metering (active/reactive power)
Breaker wear monitoring and trip circuit supervision
Fuse failure monitoring
8 oscillographic fault records
Communication Interfaces:
IEC 60870-5-103 / IEC 61850
PROFIBUS-FMS/-DP, DNP 3.0, MODBUS RTU
DIGSI 4 front/service interface (modem)
Time synchronization via IRIG-B / DCF77
