What is the principle of functioning of mercury lamp?
Principle of operation. The mercury in the tube is a liquid at normal temperatures. It needs to be vaporized and ionized before the lamp can produce its full light output.
Which gas is used in HPMV lamp?
Again, the bismuth iodide additive (HPMV) lamp produced extremely good color rendition. In operation, the lamp 10 is initially started by the establishment of a discharge between the tungsten starting electrode 28 and the adjacent operating electrode 26 through the argon or other starting gas.
How does high pressure mercury Vapour lamp work?
It uses an arc through vaporized mercury in a high pressure tube to create very bright light directly from it’s own arc. 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.
What is the full form of HPMV lamp?
High Pressure Mercury Vapour Lamp (HPMVL)is a high intensity discharge lamp in which the major portion of the light is produced by radiation from mercury operating at a partial pressure in excess of 100 kPa.
What is the working temperature of filament lamp?
The tungsten filament lamp temperature is about 2800–3300 K and consists of a linear double-ended quartz tube containing a tungsten filament, which is resistively heated.
What is the role of capacitor in mercury Vapour lamp?
Metallised polypropylene film capacitors are designed to compensate the inductive idle current drawn by discharge lamps (fluorescent lamps, high-pressure mercury vapour lamps, high-pressure sodium vapour lamps and metal halide lamps with a ceramic discharge tube) in 50 Hz/60 Hz grids.
What is HPMV light?
This HPMV lamp consists of a discharge tube containing mercury vapour, housed in an outer envelope. Features: Energy Saving. Long Life. Defect free.
What is the working principle of a fluorescent lamp?
This high valued surge voltage comes across the fluorescent lamp (tube light) electrodes and strikes penning mixture (mixture argon gas and mercury vapor). Gas discharge process gets started and continues and hence current again gets a path to flow through the fluorescent lamp tube (tube light) itself.
How does the Mercury in a vapor lamp work?
It uses an arc through vaporized mercury in a high pressure tube to create very bright light directly from it’s own arc. 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. The mercury vaporized creates a strong light between the two main electrodes.
What kind of light does a vapor lamp produce?
The mercury vapor lamp is a high intensity discharge lamp. It uses an arc through vaporized mercury in a high pressure tube to create very bright light directly from it’s own arc.
How are 3 lamps connected to three phases?
In this system 3 lamps are connected to three phases as shown in the figure below If there is no earth fault in the system the three light will glow equally with equal brightness. If there is an earth fault occur in one of the line, suppose L3 the lamp connected in that line L3 off or dim and the other two lamps glow brighter.