Advance Transformer's exclusive Linear Reactor ballast for pulse-start metal halide lamps is the high-performance, energy-saving choice for 277v/60hz circuits. Ballast losses are reduced by 50% as savings of 30-35 watts are achieved by eliminating the need for voltage transformation. The Linear Reactor's unique design eliminates excess current draw associated with lamp starting and open circuit conditions normally associated with reactor ballasts. Therefore, the fixtures-per-circuit count is the same as with CWA ballasts. These ballasts are designed for 150, 200, 320, 350, and 400 watt pulse-start lamps.
  

Advance Transformer's Regulated Lag ballasts for pulse-start metal halide lamps are specifically designed to provide long lamp life, improved lumen maintenance, and voltage-dip tolerance to meet the lighting needs of heavy industry. Superior lamp wattage control is achieved within the ballast by the inclusion of a regulation sub-circuit consisting of a capacitor across a third ballast coil. Because the ballast is a lag design, the lamp current wave form is virtually a sine wave keeping the crest factor below 1.5 (vs. 1.8 of the lead-peak CWA ballasts used with traditional probe-start lamps).

 

Advance Transformer developed the SuperCWA (constant wattage autotransformer) ballast as the mainstay ballast circuit for the new pulse-start metal halide lamps. The SuperCWA circuit employs an ignitor to start the lamp and a two-coil autotransformer ballast in conjunction with a dry-film capacitor for lamp operation. This separation of lamp starting and operating functions allows for an improved ballast design to provide better lamp performance as the ballast is no longer required to deliver the high open circuit voltage needed to start the traditional metal halide lamps. Specifically, the SuperCWA ballast has a low crest factor (1.6 vs. 1.8 max. allowed) to improve lumen maintenance and extend lamp life.

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