High Impedance Bus Differential Relay

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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.

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Key features :

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• 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 :

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• 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 :

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• 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