Multiple choice technology

WHICH TYPE OF RELAYS ARE COMMONLY USED IN LONG TRANSMISSION LINES ??

  1. REACTANCE RELAY

  2. IMPEDANCE RELAY

  3. MHO RELAY

  4. NEGATIVE SEQUENCE RELAY
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mho relays are widely used for long transmission line protection because their characteristic is a circle that passes through the origin, providing directional capability and adaptability to line impedance changes. Reactance relays are affected by resistance and can overreach, while impedance relays lack directional features. Negative sequence relays are for unbalanced fault detection, not main distance protection.

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