EPLAN Electrical P8 in Arabic Part 3 (ATS Panel)

Important loads are usually supplied using two sources of power. The two sources are usually the transformer of the utility and a stand by generator used in case of the power of transformer is gone. If the main power has been activated again, the generator will be switched off and the load will be supplied from the transformer.

This process is organized and performed using a device (Circuit) called Automatic Transfer Switch (ATS). It is very important to provide reliability during the process of feeding loads. This can be achieved using many different ways.

One of these methods is the parallel operation of two generators or transformers after satisfying the parallel operation conditions in each case. Another method is to use a stand by generator. During the normal operation the transformer feeds the loads and the generator is out.

If the main supply is gone, the generator is built up-manually or automatically- and feeds the loads. In case that the main supply has been came back,, the generator is switched off and the transformer feeds the loads. The operation of connecting and disconnecting the generator and transformed can be scheduled using a system (control circuit) called ATS which stands for Automatic Transfer Switch.