Trip circuit protection relay SIPROTEC 7VK61

synchronizationpanel-mountIEC

The SIPROTEC 4 breaker management relay SIPROTEC 7VK61 is a highly flexible autoreclosure, synchro-check and circuitbreaker failure protection unit. Features This unit is used for the single and threepole auto-reclosure of a circuit-breaker, after this circuit-breaker has tripped due to a fault. The synchro-check function ensures that the two circuits being reconnected by closing the circuit-breaker are within a defined safe operating state before the CLOSE command is issued. The SIPROTEC 7VK61 is also applicable as circuitbreaker failure protection. A breaker 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. It is then necessary to trip the relevant busbar zone (section) to ensure fault clearance. Together with the above-mentioned protection functions, the following additional functions of the SIPROTEC 7VK61 can be applied: end-fault protection, pole-discrepancy protection, overvoltage protection and undervoltage protection. As a member of the numerical SIPROTEC 4 relay family, it also provides control and monitoring functions and therefore supports the user with regard to a cost-effective power system management. Hardware •Binary inputs: 7/20 •Binary outpurs: 5/18 •Text display •Surface-mounting or flush-mounting housing Communication interfaces •System port – IEC 61850 – IEC 60870-5-103 – PROFIBUS DP – DNP 3 •Service port – DIGSI 4 – Modem •Front port – DIGSI 4 •Time synchronization via IRIG B, DCF 77 or system interface