What are the advantages of electronic ballast?
Electronic ballasts are more efficient and more compact in size and weight. They also provide the ability for continuous power adjustment at different settings. A disadvantage is that power fluctuations may cause a failure but this can be offset by adding a buffer capacitor. Operation of the ballasts generate heat.
Do electronic ballasts need starters?
Electronic ballasts do not need starters so if you are upgrading your fitting from a magnetic to electronic ballast, remember to remove the starter and starter cage.
What are the disadvantages of magnetic ballast?
Some disadvantages of the inductive ballast are: they are less efficient than capacitive ballasts, they cost more, they weigh more, and they take up more space. Magnetic ballasts are typically used in reactors using medium pressure (MP) lamps.
What causes a ballast to fail?
Causes of Ballast Failure Premature ballast failure is often caused by the surrounding environment. When it’s too hot or too cold, the ballast can burn or fail to start your lamps at all. Heat combined with prolonged condensation inside an electronic ballast can cause corrosion.
What is the working principle of electronic ballast?
Working Principle of Electronic Ballast. This control of voltage and current is done by control unit of the electronic ballast. In running condition of fluorescent lamp electronic ballast acts as a dimmer to limit current and voltage.
How is a ballast used in a negative resistance circuit?
To prevent this, a ballast provides a positive resistance or reactance that limits the current. The ballast provides for the proper operation of the negative-resistance device by limiting current. Ballasts can also be used simply to limit the current in an ordinary, positive-resistance circuit.
What is the frequency range of electronic ballast?
Electronic ballast takes supply at 50 – 60 Hz. It first converts AC voltage into DC voltage. After that, filtration of this DC voltage is done by using capacitor configuration. Now filtered DC voltage is fed to the high-frequency oscillation stage where oscillation is typically square wave and frequency range are from 20 kHz to 80 kHz.
How is an electronic ballast different from a magnetic ballast?
An electronic ballast uses solid state electronic circuitry to provide the proper starting and operating electrical conditions to power discharge lamps. An electronic ballast can be smaller and lighter than a comparably-rated magnetic one.