Dimmer protection

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8076862
APP PUB NO 20100201273A1
SERIAL NO

12702997

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Importance

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Abstract

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A lighting installation comprises (a) a lighting load, powered by an AC power supply, said AC power supply having a cycle having a period; and (b) a dimmer comprising a first semiconductor switch operable by the action of a switching voltage to switch a current to the load on and off. In normal operation, the switch may repeatedly switch the current on and switch the current off. The average power delivered to the load is altered by altering the switching on or the switching off so that the current is on for a longer or shorter portion of the period. A method of protecting the dimmer comprises monitoring the current and, when the current exceeds a threshold value, altering the switching voltage to cause the first semiconductor switch to switch off the current.

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Patent Owner(s)

Patent OwnerAddress
NOVAR ED&S LIMITEDBERKSHIRE

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Thirugnanasambandham, Kanthimathinathan Kamataka, IN 2 34

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