identify the components of the tube light and explain how
they function???wat is inside the fluroscent tube???how it
works???
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Answer Posted / sanket patil
THE MAJOR COMPONENTS OF A TUBELIGHT ARE CHOKE(INDUCTOR),
FTL (FLUROSCENT TUBELIGHT) AND STARTER.
THE FTLs AVAILABLE NOW A DAYS ARE TRIPHOSPHATE TYPE i.e.
TRIPHOSPATE COATING ON INNER SIDE(FOR HIGHER EFFICACY=(O/P)/
(I/P) IN LUMENS).
A FTL CONTAINS INERT GAS LIKE ARGON FILLED AT LOW
PRESSURE AT ABT 1/10 OF ATMOSPHERIC PRESSURE AND CONTAINS A
LITTLE AMOUNT OF MERCURY INSIDE WHICH VAPOURISES SLOWLY
WHEN TUBELIGHT IS STARTED IMPROVING THE CONDUCTION INSIDE
GIVIND STEADY LUMEN OUTPUT.
THE TUBELIGHT STARTS ALTER A PHEMOMA CALLED "GASEOUS
DISCHARGE".INITIALLY WHEN IT IS STARTED IT HAS CHOKE
(INDUCTOR) IN SERIES WITH TUBELIGHT AND STARTER IS IN
PARALLEL WTIH TUBELIGHT. AT START AS THE TUBE DONOT CONDUCT
CURRENT FLOWS THROUGH CHOKE AND STARTER. THE STARTER
CONSISTS OF A NEON LAMP(FUNCTIONING AS A BIMETALLIC STRIP)
WHEN CURRENT INCREASES BEYOND A LIMIT THE CURRENT PATH IS
BROKEN. AND WHEN CURRENT FLOEING THROUGH INDUCTOR(CHOKE) IS
FORCED TO ZERO HIGH VOLTAGE IS APPLIED ACROSS THE TUBELIGHT.
THUS GASEOUS BREAKDOWN OCCURS WHICH CANNOT OCCUR AT
NORMAL SUPPLY VOLTAGE.
IF THE TUBELIGHT FAILS TO START THEN AGAIN THE
BIMETALLIC CONTACT IS MADE AFTER A BIT COOLING AND FINALLY
IT STARTS, THIS IS THE REASON WHY STARTER FLICKERS AT THE
STARTING OF THE TUBELIGHT.
NOW ULL ASK WHY TUBELIGHT REMAINS ON EVEN IF STARTER IS
REMOVED IN RUNNING CONDITION????????
THE ANSWER IS THE NEON LAMP GLOWS ONLY IF VTG ACROSS IT
>180 V.AND NORMAL RUNNING CONDITIONS
SUPPLY VOLTAGE(230V)=VTG ACROSS CHOKE(115V APPROX.)+VOLTAGE
ACROSS TUBELIGHT(105V APPROX).
AND AS STARTER AND TUBELIGHT ARS CONNECTED IN PARALLEL
THE CURRENT FLOWS THROUGH TUBELIGHT AND NOT THROUGH THE
STARTER(CONTAINING NEON LAMP WHICH BEHAVES AS A BIMETALLIC
STRIP).THUS REMOVAL OF STARTER UNDER RUNNING CONDITION
DOESNOT AFFECT THE FUNCTIONING OF TUBELIGHT.
| Is This Answer Correct ? | 94 Yes | 6 No |
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