They provide a solution that can handle transfer of critical loads to emergency sources with reliability. They ensure the continuity of electric supply to an installation with minimum interruption by making an automatic changeover from normal supply to emergency supply.
The stand-by generator will eventually be shut down after a short cooling down period.
Automatic transfer switches are used to automatically change over from the main electrical supply to stand-by generators or generate on failure of the main supply. When the main supply is restored, the system automatically changes back and stops the generator.
