AMREST  Electricals Limited

Current Transformer

Everest manufactures indoor type resin cast, outdoor type resin cast and oil cooled Current Transformer with metering, protection and special protection purposes. The standard value of the secondary current in CT is 1A or 5A. The standard value of rated burden is up to 30VA. (2.5VA, 5VA, 7.5VA. 10VA, 15VA, and 30VA) Accuracy of class in metering CT is 0.1 , 0.2 , 0.2S , 0.5 , 0.5S , T.0 or 3. The standard accuracy class in protection CT is 5P, 10P or 15P and the accuracy limit factor 5, 10, or 15. The special purpose of current transformer applications is balanced protective system and distance protective schemes. The requirements of PS class are rated knee point voltage and maximum exciting current at the knee point voltage and the resistance of secondary winding at 75o C.