H - Electricity – 02 – H
Patent
H - Electricity
02
H
H02H 3/16 (2006.01) H01H 47/00 (2006.01)
Patent
CA 2168707
A power supply circuit is provided for selectively connecting and disconnecting a load from an alternating current power source having neutral and line conductors which comprises a transformer having a primary winding connected to the load and a secondary winding, a relay connected at one terminal thereof to the primary winding and connected at another terminal thereof to the line conductor, a control circuit connected to the relay and operable to open and close the relay, the relay being operable to provide power to the load when closed and to disconnect the line conductor from the primary winding when open, a rectifier circuit connected in parallel with the secondary winding, and an air gap switching mechanism connected to the relay and the control circuit and operable to open the relay when the air gap switching mechanism is activated.
Batko Thomas James
Eckel David Philip
Finlayson & Singlehurst
Hubbell Incorporated
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