Ballast with load-adaptable fault detection circuit

Details Ballast with load-adaptable fault detection circuit Ballast with load-adaptable fault detection circuit

H - Electricity

05

B

H05B 41/36 (2006.01) F21V 25/00 (2006.01) H05B 41/285 (2006.01)

Patent

CA 2477650

A ballast (10) for powering a gas discharge lamp load (30) comprises an inverter (100), an output circuit (200), and a fault detection circuit (300). During operation, fault detection circuit (300) monitors a first signal and a second signal within output circuit (300) and sets a fault threshold in dependence on the second signal. The second signal is indicative of the type of lamps in the load (30). In response to the first signal exceeding the fault threshold, fault detection circuit (300) issues a shutdown command directing the inverter (100) to cease operation.

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