Answer / sanjay d dalvi

CFL bulbs have an electronic circuit in the base of the
bulb. This electronic circuit is called an electronic
ballast. There is an electronic oscillator and a minature
transformer that produces high voltage enough to ionize the
gas in the tube, initially.

PL tubes are simply connected to the pins at the base.
External ballasts must be used to supply the high voltage
necessary to start the lamps.

How to calculate Ith (I thermal) for curent transformer

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definition of fault level in powersystems?

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when the time of backcharging the transformer three phases only enough or three phase with neutral is must.from these which one is the best one.

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in trains i have seen the terminal which is connected at the top of the train is positive .where is negative ? track? i dont think so

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If a motor of 30KW rating &200 mtrs distance from feeder give me the cable size selection calculation?

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what is voltage,current,restance,. what is single phase&three phase motar. what is basic electrical 'farmoulas. what is defirens quetions of electrical maintenance.

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which turbine has high thermal efficiency a)open gas turbine b)close gas turbine

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IF I KNOW THE AREA OF CROSS SECTION OFTHE WIRE , WATTAGE OF THE LOAD ,VOLTAGE SUPPLY WHAT IM GIVING TO THE LOAD AND ALSO POWER FACTOR OF LOAD ....... SO GIVE ME FOR WHAT AMOUNT OF CURRENT I SHOULD USE WHICH TYPE OF CABLE?

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In a synchronous motor armature current flows due to revolving flux which in turn rotates the load,but in no load condition armature current is zero hence thr is no revolving flux then how motor rotates?

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HOW EFFICIENTLY LOAD IS SHARED BETWEEN ALTERNATORS

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figure of phasor diagram of transformer when full load or no load ?

1 Answers   Swastik, TCS,

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in star connected 4wired transmission system ,what happen if the neutral is grounded . or not grounded. which is significant and y

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