Monitoring Functions:
Self-supervision of relay and R2R communication
Trip circuit supervision (74TC)
Measured-value supervision
Oscillographic fault recording
Event/fault logging
Switching statistics
Front Design:
User-friendly operation interface
PC front port for DIGSI 4 configuration
Function keys and 14 LEDs for local alarm indication
Communication Interfaces:
2 serial R2R protection data interfaces (ring/chain topology)
Front PC interface
System interface for control system connection via:
IEC 61850 Ethernet
IEC 60870-5-103
PROFIBUS-FMS / DP
DNP 3.0
Rear-side service/modem interface
Time synchronization via IRIG-B, DCF77, or system interface
Main Function: Feeder and overcurrent protection for all voltage levels
Inputs & Outputs:
4 current transformers, 4 voltage transformers
11–59 binary inputs, 9–33 binary outputs
Hardware: Modular design with expandable I/O; available with large, small, or no display
Protection Functions:
Directional/non-directional overcurrent protection
Ground fault detection (3I0>, V0>, transient, harmonic, intermittent)
Capacitor bank protection (overcurrent, overload, unbalance, differential)
Over/undervoltage, frequency, power, and arc protection
Fault locator, automatic reclosing (AREC), CB failure protection
Control & Automation:
Graphical logic editor (CFC), point-on-wave switching, interlocking, synchrocheck
Control of circuit breakers and power transformers
Communication:
Fixed Ethernet (RJ45) for DIGSI 5 and IEC 61850
Up to 4 pluggable modules: IEC 61850-8-1, IEC 60870-5-103/104, DNP3, Modbus TCP, PROFINET IO
PRP/HSR redundancy, IEEE C37.94 optical link
Web access & cybersecurity (RBAC, signed firmware, event logging)
Additional Features:
Phasor Measurement Unit (PMU)
IEEE 1588 time sync
Fault recording (up to 80 s @ 8 kHz)
Conformal coating standard
