SIEMENS synchronization protection relays

The SIPROTEC 7SJ6 overcurrent protection relays have been designed specifically for protection of feeders, lines and motors in medium-voltage and high-voltage systems. ...

... earth)-fault protection for single and three-phase tripping (50N, 51N, 67N) •Tele (pilot) protection (85) •Fault locator (FL) •Power swing detection / tripping (68/68T) •Phase-overcurrent protection ...

... above-mentioned protection functions, the following additional functions of the SIPROTEC 7VK61 can be applied: end-fault protection, pole-discrepancy protection, overvoltage protection ...

... SIPROTEC 7UM62 protection relays can do more than just protect. They also offer numerous additional functions. Be it earth faults, short-circuits, overloads, overvoltage, overfrequency or underfrequency ...

... reliable than 1-channel paralleling devices. It can also be used for synchro-check, with parallel operation of three synchronization points. For larger generators and power systems with high reliability requirements, ...

... 7SR157 Argus is a combined check and system synchronising relay designed to carry out controlled closing of a circuit breaker using measurements of the line and bus voltages Features The relay will ...