Intelligent I/O remote module 1MRK00008-KB

Integrated overall check zone feature, independent from any disconnector position, is available.

It can be used in double busbar stations to secure stability of the busbar differential protection in case of entirely wrong status indication of busbar disconnector in any of the feeder bays.

Flexible, software based dynamic Zone Selection enables easy and fast adaptation to the most common substation arrangements such as single busbar with or without transfer bus, double busbar with or without transfer bus, one-and-a-half breaker stations, double busbar-double breaker stations, ring busbars, and so on.

The software based dynamic Zone Selections ensures:

• Dynamic linking of measured CT currents to the appropriate differential protection zone as required by substation topology

• Efficient merging of the two differential zones when required by substation topology (that is load-transfer)

• Selective operation of busbar differential protection ensures tripping only of circuit breakers connected to the faulty zone

• Correct marshaling of backup-trip commands from internally integrated or external circuit breaker failure protections to all surrounding circuit breakers

• Easy incorporation of bus-section and/or bus-coupler bays (that is, tie-breakers) with one or two sets of CTs into the protection scheme

• Disconnector and/or circuit breaker status supervision