Physics · Power System Protection
What is 'selectivity' in the context of protective relays?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The ability of a protective relay to detect faults in both its own zone and adjacent zones
- 2The ability of a protective relay to operate only for faults within its designated zone and remain stable for external faults✓
- 3The ability of a protective relay to isolate the power source before a fault occurs
- 4The ability of a protective relay to operate instantly under all abnormal conditions
Correct answer
The ability of a protective relay to operate only for faults within its designated zone and remain stable for external faults
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