In stationary engineering, what is the function of a transfer switch?

A transfer switch functions primarily to switch the power supply between different sources. This device is essential in settings where an interruption in power supply can have significant consequences, such as in hospitals or data centers. When the primary power source, such as the utility grid, fails or experiences a fault, the transfer switch smoothly connects the load to an alternative power source, which is typically a generator. This ensures that there is minimal disruption to the electrical supply, thereby maintaining essential operations.

In practice, this capability allows facilities to have continuity of operations during power outages, ensuring that critical systems remain running without human intervention. The efficiency and reliability of the transfer switch are vital for safety and operational effectiveness in stationary engineering applications.