What is the primary purpose of a Transfer Switch in a Power Distribution Unit?

The primary purpose of a Transfer Switch in a Power Distribution Unit is to switch power sources automatically. This critical function allows for seamless transitions between different power sources, such as from utility power to a backup generator. In the event of a power outage or failure, the transfer switch detects the issue and promptly switches to the backup source, ensuring a continuous power supply to connected equipment. This capability is vital for maintaining operational integrity in critical systems that require uninterrupted power to operate efficiently and effectively.

While regulating voltage levels is essential in power management, this specifically relates to the function of voltage regulators, not transfer switches. Surge protection is also important but typically involves devices specifically designed to handle voltage spikes rather than the switch itself. Distributing power evenly is a broader concept related to load balancing and isn't the primary role of the transfer switch, which is focused on source switching.