Table of Contents
- 1 How does the choke coil help in the working of tube light?
- 2 What are the methods to improve power factor of a choke coil?
- 3 What is the role of choke and capacitor in tube light circuit?
- 4 What is Tubelight choke?
- 5 What is the need of power factor improvement of a choke coil?
- 6 Why capacitor is used in Tubelight?
How does the choke coil help in the working of tube light?
A choke coil has inductive reactance which does not cause energy dissipation. It is also much easier to control AC mains using inductors such as the choke coil. This makes a fluorescent tube much more efficient in terms of power used and light produced than normal incandescent bulbs.
What is the purpose of choke coil?
A choke coil is a part used in electrical circuits to allow DC current to flow through while blocking AC current from passing. These coils are used in a number of electrical devices. When used as part of a radio’s circuitry, it falls into one of two frequency classes: audio or radio.
What are the methods to improve power factor of a choke coil?
There are three main ways to improve power factor:
- Capacitor Banks.
- Synchronous Condensers.
- Phase Advancers.
What is power factor of tube light choke coil?
The power factor of a good choke coil is Nearly zero.
What is the role of choke and capacitor in tube light circuit?
This capacitor reduces sparking and improves life of starter. Capacitor (‘E’ in the bellow figure) is in the starter of the conventional (choke based) tube light. This capacitor reduces sparking and improves life of starter.
What is the power factor of choke coil?
zero
, the power factor of a good choke coil is virtually zero i.e, cosϕ=0. Also, choke coils are used in electrical circuits to limit current.
What is Tubelight choke?
The purpose of the choke is to provide a very high voltage initially between the filaments (across the two ends of the tube light). Again once the gas in the tube is ionized the choke provides a low voltage. A choke is a coil of wire. Fluorescent tubes/lamps are filled with mercury vapor.
What is choke coil power factor?
The correct option (a) Nearly zero Explanation: Power factor of good choke coil is nearly zero as phase difference ɸ between voltage & current is almost 90°. ∴ cos ɸ = 0.
What is the need of power factor improvement of a choke coil?
Improved Efficiency — When the power factor is increased (voltage and current wave forms in phase) more of the available power is usable, making the circuit more efficient. Reduced Size — Since less power is wasted, and lost in the form of heat, components can be smaller, saving size and cost.
Why capacitor is used in tube light circuit?
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).
Why capacitor is used in Tubelight?
When the voltage pushes into the ballast, however, the ballast initially resists the increase in current. This causes the current to lag behind the voltage, making the circuit inefficient. The capacitor is there to make the circuit more efficient by bringing the two back in phase.