Hello Friends, 

I need your expert advise on a CT with details as below:

15000/1A, 100VA 5P20 0.2S

How can we calculate the Knee point voltage for this type of CT with above values? 

I do not have any other details or datasheet. This CT is manufactured in the year 2009. 

Thanks for your valuable feedback!

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Split from Protection CT class.

Knee point voltage, Vkn = (VA X ALF)/ In

VA = burden

ALF = accuracy limit factor

In - Rated secondary current

Knee point voltage = 2000 volt