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Posted: 2025-01-0204:01 AM
Series 185 automatic transfer switch
Hello, would like to know if the controller on Series 185 automatic transfer switches include some type of In-Phase monitoring for transfer of power when switching Emergency (Alternate) source to Normal (Preferred).
I know there is a time delay and also a voltage qualification stage in the procedure but wonder if this goes to actually comparing both sources before switching over. To me, it looks as it is just controlled by the completion of the E to N time delay after voltage/frequency acceptance.