MCAG relays provide high-speed differential protection for various types of power system plants Including generators, reactors, busbars, motors and the individual windings of power transformers. The relays provide current-calibrated busbar differential and have an attracted armature design with simple and robust construction.
Key features:
High thermal withstand - improved when used with the stabilising resistor
Long service history, over 43,000 delivered since 1984
Design pedigree coming from over a million auxiliary relays in-service
Key benefits:
High stability during through faults
Operation is fast and reliable (25ms at 5 x setting)
Easy integration into 4U height MIDOS rack schemes
Highly-tuned to the fundamental to prevent spurious operation
Main characteristics:
3 element relay supplied in a 30TE (size 6 inch) case
Supplied with a stabilising resistor
Optional Metrosil available to limit CT saturation voltage
Use with MVTP where scheme buswire supervision is required
