ISRO Electrical Engineering (EE) 2015 - Question 40

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In case of 3 Phase Short circuit in a system, the power fed into the system is

  • A. Mostly active
  • B. Mostly reactive
  • C. Active only
  • D. Active and reactive both

Answer: B. Mostly reactive

Explanation: During a symmetrical 3-phase fault, the short-circuit current is limited predominantly by the inductive reactances of generators, transformers, and lines (X/R >> 1), so the fault power is mostly reactive.

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