12 If The Effective Impedance Of The Distance Relay Is 12 Lower Than The Setting Impedance Does The Relay Underteach 1 (16.9 KiB) Viewed 101 times
Advanced protection of power systems /distance relay
12- If the effective impedance of the distance relay is 12% lower than the setting impedance, does the relay underteach or overreach? What is the percentage change of the relay reach? a) underreach, 12% b) underreach, 18% c) overreach 12% d) overreach,18% 13- If the effective impedance is greater than the setting impedance of the distance relay, does the distance relay overreach or underreach? a) underreach b) overreach c) underrcach or overreach d) underreach & overreach
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