what is meant by power factor ?
Answers were Sorted based on User's Feedback
POwer Factor is a cos angle between Voltage and current.
Is This Answer Correct ? | 51 Yes | 6 No |
Answer / gautham
power factor is the Cosine of Angle between the Applied
VOltage and current. It directly depends on the Load. If
the load is Inductive then the PF is LAGGING.If the load is
resistive the PF is leading.Power Factor takes value from 0
to 1. Unity Power Factor is the Idealised condition, means
least power dissipated and high effeciency.
It can also be calculated from R/Z and KW/KVA ratings.
Is This Answer Correct ? | 15 Yes | 5 No |
Answer / satish m
It is the ratio of the resistance to impedance.
PF= R/Z.
OR
It is cosine of phase angle between voltage & current.
It can be improved by connecting the capacitors in parallel
to the supply.
Is This Answer Correct ? | 8 Yes | 5 No |
Answer / saravanan.n
the power factor of acircuit may be defined as:
(1)the ratio resistance and impedance = r/z
(2)the ratio = watts/voltampers=trepower/apparent
power=V x I x cosQ /V X I
(3)the cosine of the angle of lead or lag current from the
applied voltage
Is This Answer Correct ? | 6 Yes | 5 No |
what is the thumb rule to know current carrying capacity of copper conductors of different size.
what is the purpose of shading ring or shading coil in electrical equipments.
How to know the Max. current caring capacity of the cable by its size ?
xlpe cable 4 core nuetral wire is small why ?
If 3-Ph motor of same rating connected in Delta & Star for same load one by one then which connection take more current in running (not in starting)for full load.(eg 8.5 KW,3-Ph 400 V)
How to design CT for connected with Transformer OLTC operation? normally CT output design for 1A/5A range but during OLTC Tap position changing time how to function the CT?
Why design 150Hz in Exciter
hello everybody. please tell me the function of transformer bushing,s. i heared somewhere that it saved transformer winding from sky electricity. please tell me if that is right then how it work,s. Thank,s.
what is the use of power factor ? where its applicable ?
as we know that N=120f/P speed of an im can be controled only through changing no if poles, can we control by changing the frequncy????
explain impact of tariff on energy management..? and what is ABT tariff
what is the difference between starter and control panel..?