Why P.f. of the system decreases when it is connectect
across induction motor? & how to maintain the p.f. of
system to unity.?
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Answer / jitesh kotecha
induction motor is an inductive device and we know that in
inductive circuit current lags behind voltage due to the
inductive reactance of the motor. so that the phase angle
between voltage and current will increase. and the cosine
angle i.e. P.F. will decreases.to improve the p.f we have
to supply leading Kvar to the system. it is possible by
different way. either use capacitor bank which will supply
leading kvar to the syswtem and overall lagging kvar will
decreases and if we see the power triangle then the angle
between KW and KVA will decrease so that the p.f. will
improve. second method is to run synchronous motor on
leading p.f.in parallel with the system.
| Is This Answer Correct ? | 34 Yes | 1 No |
Answer / karthikeyan
the above answer saying synchronous motor can be used but
we never see a synchronous installed near indution motor.
We always uses static capacitors to improve the overall PF.
why because only in High end generating stations and
substations the synchronous motor can be used to imrove
system PF. for medium and small loads we can go for static
capacitor bank.
| Is This Answer Correct ? | 15 Yes | 1 No |
Answer / ravi
Bcoz the IM will drwa an Lagging Current..
We can use a APFC Bank to maintain it.
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / umesh
induction motor have inductive materials which lags behand
the the voltage,that's way power factor decreases it
connected to induction motor,
PF can improve the power factor by connecting the
syncronous motor parralel to the incution motor ,
Syncronous motor running cost is costly, it will be run in
idle
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / aniket kumar
by decreasing the reactive power we can maintain the power factor to unity
| Is This Answer Correct ? | 1 Yes | 2 No |
Answer / raushan singh
We can use capacitors to improve power factor in
Synchronous Alternators.
| Is This Answer Correct ? | 4 Yes | 8 No |
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