Determining Vk For Ieee C-Class Ct - GE MiCOM P40 Agile Technical Manual

P543i/P545i Chapter 16 - Current Transformer Requirements
5

DETERMINING VK FOR IEEE C-CLASS CT

Where IEEE standards are used to specify CTs, the C class voltage rating can be checked to determine the
equivalent V (knee point voltage according to IEC).
k
The equivalence formula is:
V = 1.05(C rating in volts) + 100R
k CT
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