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what are the difference between protection class CT and
Class PS CT
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Answer Posted / selvam.s
Protection CT:
this type of CT can be used for protect the breakers.
5P10,5P15 & 5P20 are called protection current transformer
1) 5 means accuracy of sensing fault current
2) 'P ' means "protection"
3) 10,15 & 20 means ( no.of times ( 10,15 &20 ) X actual
current rating of breakers .
PS CT:
PS means protection special current transformer.
this type CT can be used for differential protection in
transformer & in alternator.
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