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Power transfer system

  • US 5,892,297 A
  • Filed: 01/27/1997
  • Issued: 04/06/1999
  • Est. Priority Date: 01/27/1997
  • Status: Expired due to Fees
First Claim
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1. A power transfer system for connecting a load normally connected across a primary power supply across an auxiliary power supply having a start means and a stop means upon a failure of the primary power supply comprising:

  • a first two pole--single throw relay for coupling the primary power supply to the load;

    a first two pole--two throw relay responsive to the failure of the primary power supply, said first two pole--two throw relay for activating the start means and deactivating the stop means;

    a second two pole--single throw relay responsive to power supplied by the auxiliary power supply, said second two pole--single throw relay for coupling the auxiliary power supply to the load;

    a second double pole--double throw relay responsive to power supplied by the auxiliary power supply, said second double pole--double throw for decoupling the primary power supply from the load and deactivating the start means;

    a time delay relay responsive to the failure of the primary power supply, said time delay relay for activating the start means after a predetermined time delay period from the time of failure of a primary power supply.

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