Thermal protection device for a dual input voltage lamp...

Details Thermal protection device for a dual input voltage lamp... Thermal protection device for a dual input voltage lamp...

H - Electricity

02

H

315/50, 315/71

H02H 5/04 (2006.01) H05B 41/00 (2006.01)

Patent

CA 1286352

ABSTRACT: Thermal protection device for a dual input voltage lamp transformer/ballast apparatus. A thermal protection device for a dual input voltage lighting fixture apparatus which includes a re- versible connector for coupling either of two possible input voltages to the appropriate terminal of a winding of a transformer/ballast apparatus via a normally closed contact of a heat responsive thermal switch having a heating element electrically coupled to the reversible connector and thermally coupled to the closed contact. The latter contact opens in response to a level of heat above a given value. The transformer winding has two connection terminals, one of which is a tap point, connected to the reversible connector. The connection scheme provides the same ener- gizing voltage to the heating element for each of the two different possible levels of the input voltage. The apparatus will automatically indicate if the connector is reverse connected for either of the two input voltages.

553386

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