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Anonymous Poster #1

Capacitive Load Alternative

06/05/2011 3:56 AM

In electrical machines lab we used incandescent lamps instead of capacitors as capacitive load.Can anyone explain the concept.

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Guru
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#1

Re: Capacitive Load Alternative

06/05/2011 6:59 AM

I'm going to be interested if someone does.

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Anonymous Poster #1
#2
In reply to #1

Re: Capacitive Load Alternative

06/05/2011 7:26 AM

So you also don't know.

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Guru
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#3

Re: Capacitive Load Alternative

06/05/2011 10:32 AM

I really doubt that you are using just incandescent lamps. Now what does make sense to me is that the incandescent lamps are in series with the capacitors and are of such a small load that they're considered to not be in the circuit. The advantage of doing this in your lab will be that a glowing or not glowing lamp will indicate with a high degree of certainty which capacitors are in the power distribution circuit. The worst thing to have in any lab experiment is an uncertainty of your experiment configuration.

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#4
In reply to #3

Re: Capacitive Load Alternative

06/05/2011 11:59 AM

To be a student in electrical technology.Study thoroughly do experiments with needed meters. Then your doubts will clear.

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Guru
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#5
In reply to #4

Re: Capacitive Load Alternative

06/05/2011 12:04 PM

So what does this have to do with the air speed of a sparrow? Eschew obfuscation.

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Anonymous Poster #1
#7
In reply to #5

Re: Capacitive Load Alternative

06/06/2011 12:06 AM

To me nairck sounds like a faculty in one of those Engineering collage here. Do you wanna try Engineering in our place?

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Guru
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#9
In reply to #7

Re: Capacitive Load Alternative

06/06/2011 1:42 AM

Engineering collage is when you take a pile of obsolete textbooks and cut up the pretty little diagrams and glue them to a sheet of plywood. The good ones make a whole new picture out of the pieces of paper.

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Anonymous Poster #1
#11
In reply to #9

Re: Capacitive Load Alternative

06/06/2011 7:08 AM

Come-on it will be fun.We will do party frequently.make friendship with girls.Make homework done by our juniors.Do strikes in collage.In the end we will be nothing but a pile of nonsense crying to get a job.What you say?

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Guru

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#15
In reply to #5

Re: Capacitive Load Alternative

06/06/2011 12:04 PM

What is the airspeed of an unladen swallow (European)?

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Guru

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#6

Re: Capacitive Load Alternative

06/05/2011 5:04 PM

The only explanation of the 'concept' is ignorance. Adding a pure resistive load on an existing inductive, does change the total PF by changing the angle of the current vector but that's no PF correction, it's hiding inductive load in the crowd. S.M.

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#8

Re: Capacitive Load Alternative

06/06/2011 1:09 AM

Nonsense.....

Can any one use resistance instead of capacitor?

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Guru
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#10

Re: Capacitive Load Alternative

06/06/2011 4:00 AM

What do the rest of "us" say?

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Guru
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#12

Re: Capacitive Load Alternative

06/06/2011 7:38 AM

When incandescent lamps are used across power supplies, they are referred to as ballasts. They can help voltage regulation by providing a non-linear load. As the supply voltage increases (and the lamps get hotter), the power they dissipate is proportionally less. We used to use them on CD welding power supplies to help regulate capacitor bank voltage.

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#13

Re: Capacitive Load Alternative

06/06/2011 8:42 AM

Sounds like a case of semantics in the vocabulary..

...What do you use as a resistive load?

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Guru
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#14
In reply to #13

Re: Capacitive Load Alternative

06/06/2011 9:08 AM

The answer to your question is, you use a resistor as a resistive load. However, a resistor is normally designed to have a low TCR. For ballast applications you normally want the high TCR which is provided by a tungsten filament. The resistance of these filaments varies about an order of magnitude between cold and rated voltage.

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