Interested to Buy Any Domain ? << Click Here >> for more details...
what do you mean by leading power factor & lagging power
factor
- 13 Answers
- 70162 Views
- Suzlon, I also Faced
- E-Mail Answers
Answer Posted / siddarth.m
If in a circuit, current lags behind the voltage then the
resulting power factor is said to be lagging. Ex: Inductive
loads.
If in a circuit, current leads the voltage then the
resulting power factor is said to be leading.
Ex: capacitive loads.
Power factor is the ratio of real power to reactive power
P.F.=COS#= TRUE POWER\APPARENT POWER
FOR INDUCTIVE LOAD INDUCTOR IS USED WHICH OPPOSES THE
CHANGE IN CURRENT IN THE CIRCUIT AND STORES THE ENERGY IN
THE FORM OF CURRENT AND LEAVES IT LATER. HENCE THE CURRENT
CURRENT WAVEFORM LAGS THE VOLTAGE WAVEFORM, AND THE POWER
FACTOR IS CALLED LAGGING./
FOR CAPACITIVE LOAD CAPACITOR IS USED WHICH OPPOSES THE
CHANGE IN VOLTAGE AND STORES THE ENERGY IN THE FORM OF
VOLTAGE AND LEAVES IT LATER. HENCE THE VOLTAGE WAVEFORM
LAGS THE CURRENT WAVEFORM, AND THE POWER FACTOR IS CALLED
LAGGING BUT THE CURRENT LEADS THE VOLTAGE AND HENCE THE
P.F. IS CALLED LEADING P.F.
power factor is the ratio of true power and apparent power.
when the load is inductive, the inductance tends to oppose
the flow of current, storing energy then realising it later
in the cycle. the current wave forms lags behind the
voltage wave form.
when the load is capacitive, the opposite occurs, and the
current wave form leads the voltage waveform.
| Is This Answer Correct ? | 18 Yes | 8 No |
Post New Answer View All Answers
How to know the Max. current caring capacity of the cable by its size ?
Why the magneti fields are not passes from southpole to north pole
Dear Mr B C pal...Can you plz. put some light on principle of operation of Z-Ct in conjunction to its use with 1Cx1000Sqmm HT Cables & Directional Ground Fault / Over Voltage Relays...Regd..Parag v K 9899115632
What happens to a motor if it is connected in Delta connection
if we install two earth pits with a clear space of 5m without any interconnection,by checking the digital multimeter will it show continuity between earth pits? If so what would be the approx. value
How calculated single phase induction motor req. Capacitor?
Is phenomenon of resonance is harmfull fr the machine? if not or if yes please explain it?
11 kV line deraction check by an Engineer.
7- What is the Dissipation Factor and the difference between it and Insulation Resistance Test? 8- What is the task (function) of DC and AC reactors in power plant? 9- What is the task (function) of (open delta with earthed) in some types in transformers? 10- What is the base of the selection of the vector group in transformers? 11- What is the zig-zag transformer and its function by drawing in large detail? 12- What is the polarity ? 13- Why we make short between phase(R) in high side and phase (r) in low side in vector group test? Where High Side ( R ,S and T ) and Low Side ( r ,s and t ). 14- What are the time on delay and time off delay? 15- What is the vector group? 15- What is the task (function) of different types of vector group such as Dyn11 , Dd0 , YNd1,……..,?
CALCULATE THE TOTAL VOLTAGE DROP AND SELECT THE CABLE SIZE IN MM-SQARE FOR A PANEL-262KW AT 110 METER FROM THE SOURCE SUPPLY , SUPPLY VOLTAGE 240/415
HOW WE CAN REDUCE THE CIRCUIT COMPLEX OF STAR-DELTA STARTER .BECAUSE NOW WE USING ONE TIMER RELAY & THREE CONTACTOR FOR MAIN,STAR & DELTA ?IF ANY IDEAS PLZ POST.THANK U
brief notes on ammeters
33kv Rated output avilable in market (any where in india)
Why 30kw 40 hp 4 pole 3ph induction motor over heated?any steps on reduction in heat?
For some transformers we are using solid neutral earthing while some others we are using resistance earthing why ?
