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Voltage in Electrical Systems
Voltage in Electrical Systems

High Efficiency Unity Power Factor Compact Fluorescent Lamp with
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< 1 ... 912 913 914 915 916 917 918 919 920 ... 947 >

Electrical ballast



An electrical ballast is a device intended to limit the amount of current in an electric circuit. A familiar and widely used example is the inductive ballast used in fluorescent lamps, to limit the current through the tube, which would otherwise rise to destructive levels due to the tube's negative resistance characteristic.Ballasts vary in design complexity. They can be as simple as a series resistor or inductor, capacitors, or a combination thereof or as complex as electronic ballasts used with fluorescent lamps and high-intensity discharge lamps.
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