What is the Power factor of DC Power system ?
Answers were Sorted based on User's Feedback
Answer / sanjay dalvi
power factor of DC system is allways 1,why??
in DC POWER SUPPLY a power supply is constant in nature,
p=v*i angle between voltage & current is zero that is
current is in phase with voltage, cos$=0
for dc supply $ =0
& we know that cos 0 =1
so we can proove that cos $ =1 hence
p= V I COS$
P= V I KW
Is This Answer Correct ? | 83 Yes | 5 No |
Answer / kesavan.03
Power Factor is nothingbut the phase angle between Voltage
& Current. In AC System power factor will be lag & lead
system due to its nature of wave form & phase angle
difference.
As in the case of DC System there is no power factor term
is used because DC System has constant voltage & Current..
So phase difference is zero.
Power = V x I x cosØ
for DC System cosØ = 1 ( Ø = 0 degree)
Since cos 0 = 1
Is This Answer Correct ? | 26 Yes | 4 No |
Answer / eng.ahmad
the power factoe is 1 in dc system if tehere is no ripple.
for example if you test the pf of battery charger you will
find it less than 1 because of the ripple, and you can
solve this problem by using coil (chock).
eng.ahmad from iraq
Is This Answer Correct ? | 9 Yes | 2 No |
Answer / t swetha
powerfactor of dc supply is 1 why because there is no phase
difference between the voltage and current
Is This Answer Correct ? | 8 Yes | 4 No |
Answer / fazul
In a.c system current and voltage are lag or lead according
to the inductance or capacitance.
but in d.c system current and voltages are inphase with each
other.so phase angle between current and voltage is zero.
we know p.f=cosO
p.f=1
Is This Answer Correct ? | 3 Yes | 0 No |
Answer / aye thwin
1) Assuming DC supply is pure DC or constant, if load current is pure dc current, it is power factor=1, if not pf <1.
2) For DC system, should not use cos value which is related to ac system.
3) Power factor is not only relative to reactive power , but also need to consider the distortion power which is related to harmonic.
Is This Answer Correct ? | 1 Yes | 0 No |
Answer / sakthivel
in dc system voltage and current are in phase so here no
power factor
Is This Answer Correct ? | 8 Yes | 8 No |
Answer / naagaraju badara
In dc capacitor acts as o.c and inductor as s.c and in pure resistor angle b/w v&i is zero hence it will be unity always
Is This Answer Correct ? | 0 Yes | 1 No |
What is diversity factor.
which bulb is greater iluminited, 60w and 100w are conected in series?
Name the different control schemes of electric rive.
Which types of following motors are most efficient?
why lightining is not available in swith yards?
what is the bus bar size of 2700 amp ACB breaker ? and what is the cable size ?pls detailed answer ?
can we use transformer for 70 Hz?
I am an electrical contractor in noida, I am registereg in noida vat. i got a contract in Delhi State, my party told me that we shall deduct WCT @4% & reimburse Service tax all in composite scheme. Now Problem is this, 1 Can i able to purchase outside the delhi? 2 Can i produce a c form to our vendors? 3 What is limitation of purchase from outside the Delhi? 4 What % of tax Govt will levied upon me? 5 How can i take credit of tax paid upon purchase made by us. So, like these type questions i have in my mind if any person know the right answer please write to sksproj@gmail.com or contact me on - 8010076534 / 9212758177 / 9718378190. Thanks with Best Regards, S.K.Saxena
What is the formula for calculating Transformer Losses & Efficiency. I want to compare the Transformer efficiency at different loading condition.
6 Answers Rays Power Experts, Techser,
what is the consuption rating of motor in one day
What are the loading factors to be considered for transformer sizing/selection?
galloping in transmission line is due to