What devices can transformers be equipped with for operational efficiency?

Transformers can be equipped with no-load tap changers, high voltage circuit breakers, and pressure relief devices to enhance their operational efficiency and safety.

No-load tap changers allow for voltage adjustments while the transformer is energized, which helps in maintaining the desired output voltage despite fluctuations in load or input voltage. This capability is crucial for ensuring stable power delivery in utility systems.

High voltage circuit breakers are essential safety devices that protect the transformer and connected equipment from overloads, short circuits, and other electrical faults. They facilitate quick disconnection of the transformer in fault conditions, reducing the risk of damage and ensuring safer operation.

Pressure relief devices are important for maintaining safe operating conditions. In the event of excessive pressure build-up within the transformer due to thermal effects or internal faults, these devices allow for the safe release of gas or fluid, preventing potential explosions or other catastrophic failures.

Together, these devices contribute to the overall reliability, efficiency, and safety of transformer operations, making option B the most comprehensive and accurate choice among the listed possibilities.