Physics · Power System Protection
What is the usual coverage of Zone-1 in a distance protection relay for transmission lines?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The entire substation including adjacent lines
- 2100% of the protected line
- 380% to 90% of the protected line✓
- 450% of the protected line
Correct answer
80% to 90% of the protected line
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