How does a home standby generator work?

How does an automated standby generator know when to step in? Here's a brief explanation.
A permanently-installed standby generator that runs off your natural gas or LP gas supply monitors the utility voltage coming into your home and can re-supply power to your home within seconds during a power outage.

How does an automated standby generator know when to step in? Here's a brief explanation.
  • The system monitors the incoming flow of power to your home from the utility line.

  • When the flow of power is interrupted, the generator detects the problem and the automatic transfer switch disconnects the utlility line and opens the connection of power from the generator. Power is restored within seconds.

  • The generator switches back to stand-by mode when it detects that steady power has been restored from the utility line.
See this video on the various types of generators and their costs.

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