Description
Applications:
- Overhead lines including series-compensated lines and underground cables of different voltage levels
- Circuits with tapped transformer feeders
- Suitable for three-terminal line configurations, with channel redundancy and direct transfer tripping (DTT)
- Wide area system monitoring and control and using integrated protection and synchrophasor measurement
- Single and dual-breaker circuits requiring single/three-pole autoreclosing and independent synchrocheck supervision
- Secure application with Capacitively-Coupled Voltage Transformers (CCVTs)
Key Features:
- Phase-segregated line current differential with adaptive restraint and ground differential, stub bus protection
- In-zone power transformer enables savings on CTs and protection device requirements
- Thermal protection, under/over frequency, broken conductor
- Phase distance (five zones) with independent compensation settings for in-zone power transformers
- Ground distance (five zones) with independent self and mutual zero- sequence compensation, reverse power
- Line pickup, reverse power, out-of-step tripping and power swing blocking
- Thermal overload, phase, neutral and negative sequence directional overcurrent; and broken conductor
- Over, under and rate of change of frequency, synchronism check for dual-breaker applications
