Answer / badshah

Decrease in Power Factor, increases the Current flow
throught the circuit, which in turn cause more Cu.losses
(I^2*R) & Voltage Drop (I*R). It affects the supplier very
much, costing more power loss & Poor Voltage Regulation. It
also increase the Consumption cost more for the consumer.

Answer / thowsif

In a AC Ckts, P=V*I*Pf(Single Phase)

i.e, Voltage= P/I*Pf

As the Pf incereases the Voltage will Decrease.

Answer / balla

P=V*I*P.F
P.F=P/S
S=V*I
where P is power in KW and S is appearant power in KVA,
when V change while P remain the same it will decrease the
cureent and vice versa, so there is no affect on P.F , the
real affect on P.F is when there is change on power demand
either real or reactive.
If the voltage change can affect P.F why we dont use this
philosophy on P.F correction !.

Answer / rajsekhar mahapatro

power factor is depended on load but not on voltages or currents. So my dear engineers irrespective of the changes in voltages or currents and there is no change in load the power factor does not change it remains the same

Answer / maiden

PF = P/S
where P is True power in W and S is apparent power in VA. We
know that P = VI*cos(Phi) and S = VI so PF = VI*cos(Phi)/VI
It can be clearly seen that a change in voltage would affect
equally the P and S canceling any effect. What affects the
PF is the phase relationship between the voltage and the
current.

Answer / srinivas

power factor defined as the cosine value of the angle between voltage and current(cos@),it is not change with voltage,thats why there is no effect on power factor.

Answer / ranga

depend on load

Answer / eeaadil

When the pf is lagging the Voltage tends to be low and
opposite is the case for leading pf

Answer / sultan

as power factor increase the real power consumed increases and the reactive power decreases so the voltage decreases. we install the capacitor to increase the voltage but due to this capacitor there is capacitive reactance which leads to increase reactive power and decrease the real power. Ingeneral pf and voltages are inverse relation

Answer / pasha

p.f decreases

How to calculate the Airconditioner capacity for a standard telecom BTS shelter?

3 Answers  

why Line voltage =1.732XPhase voltage what mean by 1.732

4 Answers   IBM, NCC,

What is harmonics and how the 1st,2nd,3rd etc harmonic levels

2 Answers  

Consider a case that two 200 hp motors are connected to 500KVA transformer. For improving power factor can we add capacitors in common bus bars to motors. Or should we add capacitors for each individual motor?

2 Answers  

why we condut tan delta test i want brief explain?

3 Answers  

What are protection of transformer on HT side & on LT side?

4 Answers  

Explain cos(theta) and Sin(theta)

0 Answers  

What is erection of electrical system?

1 Answers  

Which type of a.c motor is used in the fan (ceiling fan, exhaust fan, pedestal fan, bracket fan etc) which are find in the houses ?

0 Answers  

-What is leakage current . how much leakage current is allowed.

3 Answers  

Electrical 'C' license full abbreviation , and full form

0 Answers  

When a square wave is applied to primary of a transformer then what will be output wave form of secondary ?

15 Answers   Bhel, Sail, Sterling Telecom, TCS,