Answer / mojinkoshy

The O/P of a current transformer (CT) is normally the secondary current of the CT. For eg.the CT may be rated like this "60/5A 15VA CL-1", in which 60/5A means the CT’s primary side current is 60A & the secondary side is 5A, 15VA means burden of the CT ie. Maximum power capacity / rating, CL-1 means the insulation class of the CT.

Since the O/P of CT’s are used for protection / measurement, the o/p rating is totally depends up on the ratio settings of the protective devices tripping capacity or that of the measuring instruments measurement capacity .

If the load of transformer is getting more than its rating,,,than how to overcome this problem? Suppose thee rating of transformer is 315kva and the load is going beyond than the rating say around load: 352kva... Than how can we solve this problem without deducting the load.

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