What is the primary purpose of a pad-mounted transformer?

The primary purpose of a pad-mounted transformer is to facilitate power distribution. These transformers are typically used in underground electrical distribution systems and are crucial in stepping down high voltage electricity from the utility lines to a lower voltage level that can be safely used by residential or commercial customers. By placing these transformers outside, they allow for easier access for maintenance and reduce the need for extensive overhead wiring.

In contrast, while voltage regulation is an important aspect of transformer functionality, it is not the main purpose of a pad-mounted transformer. Customer service also plays a role in the overall function of the power distribution network but is not the direct purpose of such transformers. Load testing is a procedure that might be performed on transformers to ensure they can handle certain loads, but it does not define their primary function in the electrical system. Therefore, power distribution is the most accurate characterization of the primary purpose of a pad-mounted transformer.