Function overview

•  Busbar differential protection
•  Selective zone tripping
•  Very short tripping time (<15ms)
•  Extreme stability against external fault, short saturation-free time (≥ 2 ms)
•  Phase-segregated measuring systems
•  Integrated check zone
•  48 bays can be configured
•  12 busbar sections can be protected
•  Bay-selective intertripping

Breaker failure protection functions

•  Breaker failure protection (single-phase with/without current)
•  5 operation modes, selectable per bay
•  Separate parameterization possible for busbar and line faults
•  Independently settable delay times for all operation modes
•  2-stage operation bay trip repeat/trip busbar
•  Intertrip facility (via teleprotection interface)
•  “Low-current” mode using the circuit-breaker auxiliary contacts

Additional protection functions

•  End-fault protection with intertrip or bus zone trip
•  Backup overcurrent protection per bay unit (definite-time or inverse-time)
•  Independent breaker failure protection per bay unit

Features

•  Distributed or centralized installation
•  Easy expansion capability
•  Integrated commissioning aids
•  Centralized user-friendly configuration / parameterization with DIGSI
•  Universal hardware

Communication interfaces

•  FO interface
ü  IEC 60870-5-103 protocol
•  Electrical interface
ü  IEC 61850 protocol with EN 100 module (firmware V4.6)