Why do we use Distance Relay to protect high voltage power lines?
A. Because the distance relay is cheaper than other relays and convenient to use
B. Because the short-circuit current in the power system depends on the system configuration, we therefore use impedance measurement per distance instead of other relays.
C. Because the distance relay is a relay that uses both current and operating voltage, it is more reliable than using other relays.
D. Because the distance relay is a directional relay, it is more reliable than using other relays.
Show Answer
Answer: B
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