Physics · Power Systems

What is the primary advantage of using current grading in relay protection systems?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1It reduces the impedance between two sub-stations.
2It overcomes the long time delays occurring in graded time lag systems near the source.✓
3It improves the frequency stability of the power system.
4It ensures quick tripping of the faulty circuit under all fault locations.

Correct answer

It overcomes the long time delays occurring in graded time lag systems near the source.

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