Venture Lighting International: Bright Ideas, Bold Innovations
An Advanced Lighting Technologies Company Systems by Venture Lamps by Venture Ballasts Controls - LeafNut Venture's LED System Components Venture Lighting's Home

Applications
Venture Lighting Literature
Techincal Information
Energy Saving Lighting
RecyclingSearch by product

Venture Contact Info

Venture's Technical Information
Capacitors

With lag and HX ballasts, capacitors are needed to improve (input) power factor. As a result, the number of lamps that can be operated on a circuit nearly doubles. In large installations, power factor correction is also required to avoid power quality problems and utility penalties. Capacitors are integral components of CWA and regulated lag circuits; they will not operate without capacitors. Both oil-filled (wet) and dry-film capacitor technologies are commonly used with ballasts. A means to discharge capacitors after power is turned off is a safety requirement.

 

Oil-filled capacitors
Oil-filled capacitors come in metal cases and are filled with a dielectric fluid. They are rated up to 100°C, although 90°C is the most common rating. They usually have two 1/4" spade terminal lugs located on the top for connection with the ballast. Most ballasts come with the mating terminals already attached to the appropriate leads. Oil-filled capacitors are very reliable and available in ratings up to 525V. For some higher wattage HID ballasts, they are the only choice.

back to top

 

Dry-Film capacitors
Dry-Film capacitors do not use a dielectric fluid. Originally, these capacitors were limited to applications where voltages did not exceed 330V. Recent advances have pushed this to 400V. They are available in temperature ratings of 100°C and have become an attractive alternative to oil-filled capacitors. They are packaged in plastic housings which do not need to be grounded and do not need any special clearances above the terminals.

back to top

 

Technical Section Links
 
 

 

 
li li
   © 2016 Venture Lighting International, Inc. | Privacy