Answer / shariff

Knee Point Vog is the Point where the Votlatge shouts up
and the Current gets saturated for the CT across its cors
and it is a very vital parameter for any current
transformer. And this Knee Voltage value should be same for
all the 3 phases of the CT.

Answer / raj

For Protection CTs knee point voltage is always high than
Metering CTs to avoid saturation of CTs during fault
current.But to increase the knee voltage core size should
be increase which is practically possible or economical so
another method to reduce the burden on CTs by using
secondary ratio 1A inplace of 5A.

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