High Pressure Mercury Vapour Lamp Diagram

This is different from fluorescents which use the mercury vapor arc to create a weaker light that mainly creates uv light to excite the phosphors.

High pressure mercury vapour lamp diagram.

When a mercury vapor lamp is first turned on it will produce a dark blue glow because only a small amount of the mercury is ionized and the gas pressure in the arc tube is very low so much of the light is produced in the ultraviolet mercury bands. A sodium vapor lamp is a gas discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. In case of fluorescent lamp the mercury vapour pressure is maintained at lower level such that 60 of the total input energy gets converted into 253 7 nm single line. It uses an arc through vaporized mercury in a high pressure tube to create very bright light directly from it s own arc.

The mercury vapor lamp is a high intensity discharge lamp. High pressure sodium ballast wiring diagram sodium vapor lamp circuit diagram unique low pressure sodium vapour lamp perfect lamp efficacy efficiency. In case of fluorescent lamp the mercury vapour pressure is maintained at lower level a schematic diagram of mercury lamp is shown below. Diagram working principle march 15 2020 august 13 2018 by electrical4u a low pressure sodium vapor lamp or lpsv lamp is termed as a miscellaneous discharge lamp as it possesses some characteristics of high intensity discharge hid lamps as well as it resembles fluorescent lamps in other areas.

Low pressure sodium vapour lamp. The tube contains a few milligrams of mercury and around 25 50 torr of pure argon as a buffer gas to carry the discharge while the lamp warms up producing. Two varieties of such lamps exist. At the heart of the lamp is an arc tube which is fabricated from quartz with a tungsten electrode disposed at either end.

Figure 1 a typical high pressure mercury lamp. As the main arc strikes and the gas heats up and increases in pressure the light shifts into the visible range and the high gas pressure causes. Again transition of the electrons requires least amount of input energy from a colliding electron. A ground connection must be made to all ballasts to avoid shock hazard personal injury or damage to the luminaire or installation.

It uses an arc through vaporized mercury in a high pressure tube to create very bright. Low pressure and high pressure low pressure sodium lamps are highly efficient electrical light sources but their yellow light restricts applications to outdoor lighting such as street lamps where they are widely used. The mercury vapor ballast wiring diagram is the blueprint for the ballast circuitry including the input supply voltage and grounding methods.