Circuit breaker failure protection relay Siemens Power Transmission Distribution
SIPROTEC 7SV600 is a numerical relay used for circuit-breaker failure protection. It is suitable for use at all voltage levels and in all applications.
Protection functions
Circuit-breaker failure protection (single or three-pole with/without current)
Independently settable delay times for operation with and without current
Single or two-stage time delay of the busbar trip command
Re-trip (cross trip) stage (1st stage of the 2-stage operation)
Intertrip facility (via teleprotection interface)
End-fault protection with intertrip
No current control using the circuit-breaker auxiliary contacts
Features
Highly sensitive current detection
2-out-of-4 check of the current detectors
Short reset time, negligible overshoot time
Can be initiated by phase-segregated or common-phase trip commands
End-fault protection
Assignable output relays, LEDs and binary inputs
Monitoring functions
Monitoring of circuit-breaker auxiliary contacts
Operational current measured values
Self-supervision of the relay
Event buffer
Fault protocols
Oscillographic fault recording
