This FAQ has been written for NEAL (North East Africa and Levant) region. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.
What is the Over current coefficient (Ksi) for a current transformer? What is its relevance in current transformer feasibility?
The Over current coefficient (Ksi) of a current transformer can be defined in terms of its rated primary and short time withstand current as follows:
Knowing the value of this factor allows us to know whether a CT will be easy to manufacture or otherwise as follows:
- The lower Ksi is, the easier the CT will be to manufacture.
- A high Ksi leads to over-dimensioning of the primary winding's section; the number of primary turns will therefore be limited together with the induced electromotive force; the CT will be even more difficult to produce.
Released for: Schneider Electric Egypt and North East Africa
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