Developed in the 1960s they are similar to mercury vapor lamps but contain additional metal halide compounds in the quartz arc tube.
Igniter circuit for metal halide lamp.
Metal halide lamps belong to a family of high intensity discharge hid lamps that includes mercury vapor and sodium vapor lamps.
Electric lamps part 08 notes is available in http zenmurali blogspot in inventor of metal halide mh lamps in the year 1912 charles p.
There are three basic ignitor circuits in wide use.
A metal halide lamp is an electrical lamp that produces light by an electric arc through a gaseous mixture of vaporized mercury and metal halides compounds of metals with bromine or iodine it is a type of high intensity discharge hid gas discharge lamp.
Will test a pulse start light fixture with an ignitor.
The lamp uses mercury vapor to create the powerful light like the high pressure mercury vapor but includes other metals halide salts to improve the color.
Both testers fit in one belt loop.
Suitable for hid ballast circuit with starter ignitor.
Checks starting pulse voltage and open circuit voltage.
Used on hps high pressure sodium mh metal halide and mv mercury vapor types of lamp.
The metal halide and high pressure sodium ballasts also incorporate wave shaping of the open circuit voltage to provide a higher peak voltage than a normal sine wave.
Although metal halide bulbs are long lasting still they wear out.
250 w hid metal halide electronic ballast introduction this application note describes the two stages of electronic ballast for a 250 w hid metal halide lamp.
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.
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.
The simplest is a capacitor in series with a voltage sensitive switch that connects across the output of a lag ballast.
A halide is a chemical compound of a halogen combined with an electropositive element or in the case of lamps.
So once these occur with your metal halide lamp getting a replacement bulb doesn t have to be your first step.
Metal halide high pressure sodium and mercury vapor are types of hid lamps.
This peak voltage along with the ignitor when used is used to start the lamp and control the lamp current crest factor typically 1 60 1 65.
Ignitor a device either by itself or in association with other components that generates voltage pulses to start discharge lamps.
It is used internationally to start traditional metal halide lamps on 220 230v 50 hz mercury vapor ballasts.
Capacitor a device used in electric circuitry to temporarily store electrical charge in the form of an electrostatic field.
