Answer / sunil ulange

There are 2 types of CT's
1. Measuring purpose CT - Class 0.2, 0.1
2. protection Purpose CT- class PS, 5p10, 5P20

Class 0.2 - 0.2 Accurcy for meters.
Class PS- means Protection Purpose relays, breakers etc.
Class 5P10 - means 5% accuracy, P -protection, carry 10
times normal current

any Substation related questions ask me @ sunil_031@yahoo.com
Sunil Ulange
Project Engineer
Greenesol power Systems bangalore

Answer / ahamar

5P is a protection class of current transformer.CT,s are of
three types,for current measuring,for protection and
special protectin class.

Answer / amin

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