When there is a power outage, an emergency power supply system (EPSS) transfer switch can move the flow of electrical energy from the primary source to an alternative backup source, such as a generator.
The device separates the alternative power source from the primary source during the duration of the power outage or to avoid an overload.
When power is restored to the primary source, the gadget can return the flow of electricity to the main source.
Essentially, the switch functions as a bridge between two electrical sources by flipping its contacts, allowing electricity to flow from the alternative source if the main source is insufficiently powered.
This contact change can be done manually (or) automatically, based on the type of switch used.
An automatic changeover switch can detect a defect or restore on the primary source and switch between the 2 sources as required.
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