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MCAG34
MCAG.jpg
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.
 
Basic description:
 
 Current-calibrated busbar differential 
 Attracted armature design with simple and robust construction High impedance protection principle
 
Key customer 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
 
Overall differentiation factors:
 
 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