Question
Download Solution PDFA relay is connected to a 400/5 A current transformer and set for 150%. The primary fault current of 2400 A needs a plug setting multiplier of
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Plug setting multiplier is the ratio of fault current and the product of plug setting and CT ratio.
Plug setting multiplier
Calculation:
Plug setting = relay setting × secondary CT current
= 1.5 × 5 = 7.5
CT ratio
Plug setting multiplier
Last updated on Jul 2, 2025
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