What is the principle of working of Tubelight?
“ As the name indicates, the tube-shaped fluorescent lamp is called tube light.” It works on the principle of the low-pressure mercury vapor discharge phenomenon, which converts UV rays into visible rays with the help of phosphor-coated inside the tube.
How tube light circuit is connected and how it works?
How tube light circuit is connected and how it works? When we give the power to turn on the tube light, the voltage comes to this side with the help of starter and ballast and due to full voltage, the gas in the starter becomes ionized and heats the bent bimetallic strip to be connected to a fixed contact.
Why capacitor is used in tube light?
Fluorescent lamps form an inductive load on the AC mains supply. As a result large installations of such lamps suffer a poor power factor and resultant voltage drop. Adding a capacitor to each lamp corrects the power factor bringing it back close to unity (1.0).
How does a Tubelight start?
When you turn on a fluorescent tube, the starter is a closed switch. The filaments at the ends of the tube are heated by electricity, and they create a cloud of electrons inside the tube. The fluorescent starter is a time-delay switch that opens after a second or two.
What is ballast in tube light?
In a fluorescent lighting system, the ballast regulates the current to the lamps and provides sufficient voltage to start the lamps. Without a ballast to limit its current, a fluorescent lamp connected directly to a high voltage power source would rapidly and uncontrollably increase its current draw.
Which powder is used in tube light?
phosphor
The white powder that you see inside a fluorescent light bulb is called phosphor, which is a substance that emits visible light whenever it absorbs ultra violet energy waves.
What are the two function of ballast?
Functions of Ballast It provides levelled bed or support for the railway sleepers. It transfers the load from sleepers to subgrade and distributes the load uniformly on subgrade. It holds the sleepers in a firm position while the trains pass by.
What are the parts of tube light?
The materials used to build a tube light are given below.
- Filament coils as electrodes.
- Phosphor coated glass bulb.
- Mercury drop.
- Inert gases (argon)
- Electrode shield.
- End cap.
- Glass stem.
What is the function of a ballast?
A ballast is a device that is used with fluorescent and other discharge lamps to provide the required current and voltage. The primary function is to provide the lamp with high voltage and/or cathode heating during start-up, and then to stabilise the arc by limiting the electrical current to the lamp.
Who invented tube light?
Edmund GermerFluorescent lamp / Inventor
What is the size of ballast?
The size of ballast used under point and crossings is 25 mm. Quality of stone ballast required per metre tangent length of broad guage is 1.11 cu. m and for metre gauge, it is 0.767 cu.
How does a transformer work?
The basic principle on which the transformer works is Faraday’s Law of Electromagnetic Induction or mutual induction between the two coils. The working of the transformer is explained below. The transformer consists of two separate windings placed over the laminated silicon steel core.
What is the working principle of tube light?
Working Principle of Tube Light When the switch is ON, full voltage will come across the tube light through ballast and fluorescent lamp starter. No discharge happens initially i.e. no lumen output from the lamp. At that full voltage first the glow discharge is established in the starter.
What is the working principle of a starter in a tube light?
Starter: The starter is a small neon glow up lamp that contains a fixed contact, a bimetallic strip and a small capacitor. Working Principle of Tube Light When the switch is ON, full voltage will come across the tube light through ballast and fluorescent lamp starter. No discharge happens initially i.e. no lumen output from the lamp.
What is a voltage transformer?
The Voltage Transformer can be thought of as an electrical component rather than an electronic component. A transformer basically is very simple static (or stationary) electro-magnetic passive electrical device that works on the principle of Faraday’s law of induction by converting electrical energy from one value to another.