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Shunt reactors are sometimes used in high voltage transmission systems to

1. limit the short circuit current through the line.
2. compensate for the series reactance of the line under heavily loaded condition.
3. limit over-voltages at the load side under lightly loaded condition.
4. compensate for the voltage drop in the line under heavily loaded condition.

Correct answer: limit over-voltages at the load side under lightly loaded condition.

Solution

Shunt reactors are employed in high voltage transmission systems to absorb reactive power, which helps to stabilize voltage levels and prevent over-voltages, particularly when the system is lightly loaded.

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