Numerical Circuit-Breaker Failure Protection Relay block 7SV600

Type : 7SV600

Features and technical specifications:

1. Highly sensitive current detection
2. 2-out-of-4 check of the current detectors
3. End-fault protection
4. Short reset time, negligible overshoot time
5. Can be initiated by phase-segregated or common-phase trip commands
6. Digital inputs : 3 binary inputs
7. Digital outputs : 4 output relays
8. RS 485 Communication Port                                                                                                                                                                                                                                                 The following functions are available
   1. Circuit-breaker failure protection (single or three-pole with/without current)
   2. Intertrip facility
   3. End-fault protection with intertrip
   4. Self-supervision of the relay
   5. Fault protocols
   6. Oscillographic fault recording                                                                                                                                                                                                                                                                                                                      This Numerical Protection relay block is easily insert in your schematic diagram and connect as you like way.                                                                                                                                                                           The SIPROTEC 7SV600 is a numerical relay used for circuit-breaker failure protection. A failure occurs when the circuit-breaker fails to correctly open and clear the fault after single or three-pole trip commands have been issued by the protection unit. It is then necessary to trip the relevant bus bar zone (section) to ensure fault clearance. Generally, the monitoring of the current is sufficient as the criterion for the indication that the circuit-breaker has successfully cleared the fault (“current condition”). However, under certain fault conditions (e.g. over voltage), little or no current may flow, making the measurement of current unreliable for indication of the circuit breaker status (“no current condition”). The 7SV600 operates correctly for both these conditions. The relay is suitable for use at all voltage levels and in all applications.
      The current transformers can either be of the closed iron core or linear type. The relay can be incorporated in conventional switch gear systems and modem substation control systems e.g. SICAM.                                The numerical circuit-breaker failure protection relay 7SV600 provides rapid backup fault clearance instruction to the associated circuit-breakers in case the circuit-breaker nearest to the fault fails to respond.