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

What do you mean by pf of a generator? Power factor purely depends on the load (wether inductive, reactive or unity) then what does the pf mentioned on the generator nameplate means?

3 Answers  

i have seen a picture of a power plant. in that pic. i saw chimney like giant structure which were spreading smoke like something...i want to know is it chimney or cooling towers, as my friends use to say.

2 Answers  

What are the fire Estingushers use in electrical fire?

3 Answers  

Why generating power limited to 11kv?

4 Answers   PSU,

Benifits of 3ph 4 wire metering over 3ph 3 wire

0 Answers  

which inert gas is most apt to be used in a fluorescent lamp?? why ??

1 Answers  

what is the defination of Cable database? What are the points are considered while preparing cable database? Is there any sample available for cable database?

0 Answers  

How can we calculate the rating of a transformer suppose if load is 1000KW?Formula?

3 Answers  

What are the significant parts of dc generator?

0 Answers  

What is the function of a pressure Switch in a Substation?

2 Answers  

A T-T transformer can not be parallel with transformer A V-V B star-delta C star-star D delta-delta

1 Answers  

why 5kW motor becomes unbalance if its relay trip 1st time and its set value is 7.0 A

0 Answers