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Automatic Transfer Switches (ATS)

30 Amps to 3000 Amps

Sommers stocks and supplies a wide selection of Automatic Transfer Switches for standby generator systems. We are Canada‘s largest distributor of Cutler-Hammer switch gear, trusted for lasting reliability and easy installation. We carry a large inventory, ready to ship for both retail customers and for fast service to our dealers.

How Automatic Transfer Switches Work:

  • In automatic transfer switch equipment, the switch‘s intelligence system initiates the transfer when normal power fails below a preset voltage.
  • If the emergency power source is a standby generator, the automatic transfer switch starts the generator system, then transfers the load when sufficient voltage is available from the generator.
  • When normal power is restored, the switch automatically transfers the load back to the original source and shuts down the engine of the standby system.
  • If the normal power source fails and no emergency power source is available, the ATS remains connected to the normal power source until the emergency source is ready.
  • Likewise, if the emergency power source fails while operating, and the normal power source remains unavailable, the switch remains connected to the emergency power source.