Ballast a device required by electric discharge light sources such as fluorescent or hid lamps to regulate voltage and current supplied to the lamp during start and throughout operation.
Ignitor metal halide lamp circuit diagram.
Like fluorescent lamps hid lamps produce light by the excitation of a gas confined between a pair of electrodes and require a ballast to limit current draw and to provide proper starting and operating voltages.
Metal halide lamps belong to a family of high intensity discharge hid lamps that includes mercury vapor and sodium vapor lamps.
A halogen is a monovalent element which readily forms negative ions.
1 how it works.
When the supply voltage is half of the week v2 ignitor.
The ballast data tables in our catalog indicate the page number and reference letter corresponding to the correct diagram for each ballast product.
Schematic diagram of a metal halide lamp is shown below.
Gas discharge lamps an electric lamp.
The auxiliary electrode or starter electrode near the main electrodes attached to the glass stem creates initial discharge between them.
The simplest is a capacitor in series with a voltage sensitive switch that connects across the output of a lag ballast.
Wiring diagram for my yardblaster conversion from mercury vapor to probe start metal halide here is a rough sketch of how i wired my philips si51 750v 2 wire parallel ignitor to my american electric r175m mercury vapor yardblaster fixture to convert it to probe start metal halide.
How does a metal halide lamp work.
Ansi code american national standards institute ansi code that indicates the electrical operating designation of the lamp which must match that of the ballast.
Wiring diagrams for venture standard metal halide ballast products are provided on this page.
Standard metal halide hps ballasts brackets wiring diagrams warranty information.
The combination of wires to be used for a specified voltage will be indicated in the wiring diagram and often labeled on the wires too.
It is the early use of high pressure sodium lamp electronic ignitor in recent years two way thyristor tube ignitor commonly used electrical schematic diagram its working principle is as follows.
A halide is a chemical compound of a halogen combined with an electropositive element or in the case of lamps.
The ballast is composed of a boost converter power factor controller pfc working in fixed off time and an inverter composed of a full bridge that drives the lamp at low frequency square.
It is used internationally to start traditional metal halide lamps on 220 230v 50 hz mercury vapor ballasts.
There are three basic ignitor circuits in wide use.
When full voltage is applied across the main electrodes no arc is produced at the time of switching.
