In which configuration are the secondary coils of a booster transformer connected?

The secondary coils of a booster transformer are connected in series with the line to increase the voltage supplied to the load. This series connection allows the transformer to boost the line voltage effectively, aiding in the delivery of adequate power, particularly in situations where voltage drops may occur due to distance or load conditions. By being in series, the booster transformer can contribute its voltage directly to the circuit, improving overall system performance.

In contrast, configurations like parallel connections do not allow for voltage boosting in the same manner and could lead to issues like impedance mismatches. An open loop configuration would prevent any connection to the line altogether, rendering the transformer ineffective. A reverse connection with the line would not facilitate the intended voltage boosting for operational efficiency. Therefore, the series configuration is essential for fulfilling the functionality of a booster transformer in power systems.