What is the difference between Open and Close transition for Automatic Throwover Applications?

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Issue:

Automatic Throwover.

Product Line:

Switchgears and Switchboards.

Environment:

Switchgears and Switchboards.

Cause:

Define Open and Close Transitions.

Resolution:

The Automatic Throwover System (ATS) operates when the primary source is shut down, transferring the load to the secondary source. In other words, the ATS disconnects the load from Source 1 and connects it to Source 2, which can be a secondary utility or an emergency generator, ensuring a steady power supply.

In a closed transition, there is a brief period when both sources are connected to the load simultaneously, operating in a parallel system. In contrast, during an open transition, both sources cannot be connected at the same time.

Switchgears and switchboards usually have ATS functionality, which can be controlled by a Programmable Logic Controller (PLC) or Protection Relays.