What is the primary function of fuses in a transformer bank?

The primary function of fuses in a transformer bank is to protect the system from overloads. Fuses act as a safety device that interrupts the electrical circuit when the current exceeds a predetermined level. This helps prevent damage to the transformer and other components of the electrical system by stopping the flow of excess current that can lead to overheating, equipment failure, and potentially hazardous conditions.

In a transformer bank, fuses are strategically placed to ensure that each transformer is protected. When an overload condition occurs, the fuse will blow, disrupting the current flow and thereby safeguarding both the transformer and the entire system. This protective mechanism is crucial because transformers can be susceptible to damage from overcurrent situations due to their design and function in step-up or step-down voltage applications.

The other options relate to functions that transformers perform but do not align with the primary purpose of fuses. Fuses do not increase voltage or transform current; these are primary functions of the transformer itself. Additionally, while power factor regulation is important in electrical systems, it is not the role of a fuse. The fuse's sole purpose is to offer protection rather than influence voltage, current transformations, or power factor adjustments.