To limit short-circuit current in a power system are used______________?
Correct answer: D. reactors
- A. earth wires
- B. isolators
- C. H.R.C. fuses
- D. reactors
Explanation
Reactors add inductive reactance to the circuit, limiting the rate and magnitude of short-circuit current. Earth wires and isolators do not provide this current-limiting impedance, while HRC fuses interrupt rather than continuously limit the fault current.
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