A new low cost high power factor electronic ballast is introduced in this paper. The proposed topology is based on a single power processing stage to provide high frequency voltage to fluorescent lamps and high power factor to the utility line. The power processing stage is formed by a half-...
PROBLEM TO BE SOLVED: To provide a mounting structure of a ballast, where the ballast can be mounted to an equipment body in the case of using any ballast of different shape.;SOLUTION: An equipment body that has plural ballast fixing parts set in a given space, ballast 3 that has plural...
美客数码配件专营店 进店逛逛 折啊 WW-QYV4-6F32T8LAMPRESIDENTIALBALLAST其它元器件 WW-QYV4-6【F32T8 4 LAMP RESIDENTIAL BALLAST】 ¥38.19 折后¥38.19 发货地: 广东 深圳 风格: BALLAST
The present invention relates to ballast bodies and to a method for production of ballast bodies in track and road construction as well as dyke construction, which have high stability and a long useful life, composed of ballast stones and polyurethane foam materials based on a reaction mixture ...
PURPOSE: To prevent the falling of ballast scraped up by a rotary sweeper brush. ;CONSTITUTION: Ballast on the insides of rails R is scraped up by a rotary sweeper brush 5, and the ballast is guided to a conveyor 7 by a sweeping-up chute. Ballast is slid before and behind while changi...
The derrick loading boom is slung from two slings whose ends are connected to a single drum to swing the boom from side to side. Each sling loop is taken over a set of pulleys with a ballast weight attached to one pulley. The ballast weights are connected to springs which tend to hold...