I have one ct of ratio 3000-2000/1 Amp its knee point voltage mentioned on nam

I have one ct of ratio 3000-2000/1 Amp its knee point
voltage mentioned on name plate is 500-333/30mA-50mA at
Vk/2. in secondary box there is three terminal named 1S1,
1S2, 1S3 then on which terminal obtained the knee point
voltage ie 1S1-1S2 OR 1S1-1S3 & also specify the knee point
voltage for the ratio 3000 from name plate.

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