What meant by lagging and leading? When if they are occurred what preventive m

Categories >> Engineering >> Electrical Engineering
Suggest New Category

What meant by lagging and leading? When if they are
occurred what preventive methods should be taken?

Question Posted / ravi

14 Answers
50668 Views
ABB, L&T, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

What meant by lagging and leading? When if they are occurred what preventive methods should be tak..

Answer / a.balakrishnan

Basically Three types of load are there..
1.Resistive load
2.Inductive load
3.Capacitive load
Resistive load always having unity power
factor.So we do not consider that type of loads.
In Inductive load Having Lagging power
factor,so we must improve the power factor.For this
improvement we can choose capacitor,Synchronous Motor
connected in parallel.These Loads give the Leading
current ,so it is compensate the lagging current...

Is This Answer Correct ?

87 Yes

3 No

What meant by lagging and leading? When if they are occurred what preventive methods should be tak..

Answer / nilesh agrawal

lagging means the current is lag the voltage and leading
means the current is lead the voltage,when the circuit is
inductive ,current lag behind the applied voltage.when the
circuit is capcitive the current is leading the voltage.

to improve power factor a capacitor is connected in
parralel with the ckt.

Is This Answer Correct ?

52 Yes

8 No

What meant by lagging and leading? When if they are occurred what preventive methods should be tak..

Answer / aditya dashora

lagging and leading are gererally refered as current over
the voltages. if we say its lagging then it is the current
must be behind the voltage and on the other hand in
leading ,current must be ahead voltage. in power system we
use lagging power factor in operation but its above .85.

Is This Answer Correct ?

49 Yes

19 No

What meant by lagging and leading? When if they are occurred what preventive methods should be tak..

Answer / ashish

Lagging means current is lagging with respect to voltage by
some angle and in case of leading current leads voltage by
some angle.
in case of resistive load: current and voltage are in phase
ie angle between current and voltage is zero.
in case of inductive load:- current lag behind with respect
to voltage by some angle.
In case of capacitive load:- current lead voltage by some angle

Only remember CIVIL :- That means in case of capacitor(c)
current(I) leads with respect to voltage. similarly in case
of inductive (L)load we start from right side: current (I)
lag by some angle w.r.t to voltage.

Is This Answer Correct ?

29 Yes

2 No

What meant by lagging and leading? When if they are occurred what preventive methods should be tak..

Answer / nimish

it is a power facotr. Lagging means currents lags behind
the applied voltage by some angle and leading means current
leads the applied voltage by some angle. to improve the
power factor we should use a capacitor bank in parallel
with inductive load.

Is This Answer Correct ?

16 Yes

2 No

What meant by lagging and leading? When if they are occurred what preventive methods should be tak..

Answer / mahesh kumar ray

lagging and leading is the relation of current and voltage.
lagging means current achieve its peak value after the
voltage and leading means current achieve is peak value
before the voltage. this leading and lagging is expressed with
respect to time or angle.for example suppose that at time 't'
the value of current is 'i' then in case of lagging at same
time value of voltage will be 'vm'.

Is This Answer Correct ?

14 Yes

5 No

What meant by lagging and leading? When if they are occurred what preventive methods should be tak..

Answer / rahul

All right...
but keep in mind that the concept of lag or lead is valid
only when BOTH V and I waves are sinusoidal.
THEn lag__ I lags V
lead__I leads V

Is This Answer Correct ?

8 Yes

0 No

What meant by lagging and leading? When if they are occurred what preventive methods should be tak..

Answer / soni

Ashish,good
I liked ur way of explaining... thanx

Is This Answer Correct ?

6 Yes

2 No

What meant by lagging and leading? When if they are occurred what preventive methods should be tak..

Answer / yogeesh.b

capacitor should be incresed in lagging power facitor
indactene should be incresed in leading power facitor

Is This Answer Correct ?

5 Yes

2 No

What meant by lagging and leading? When if they are occurred what preventive methods should be tak..

Answer / suraj rawat

leading = current phase> voltage phase
lagging = eans current phase < voltage phase

Is This Answer Correct ?

2 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

when we increased the current what do ?

0 Answers

what is motor

6 Answers HBL Power Systems,

why the desirable efficiency for a motor is 60%, but in case of transformer, it is above 90%?

1 Answers

Between educational qualification and practical work experience, give us a brief explanation on your practical experience in your past Endeavour that you performed well to the satisfaction of your past or present employer?

0 Answers

why knee point voltage should be high in Ct for differential protection

1 Answers NTPC,

A ceiling fan moves Counter clockwise & a pedestal fan clockwise.....y the difference????

5 Answers Alstom, NTPC,

how to calculate power loss cost of aluminium conductor and copper conductor?500v,100A,68mm area squre busbar.

1 Answers

i have a 4 Mva transformer 34.5 kv / 480-277 v and i used 2 parallel 3200 amp bus duct for the secondary feeder using 3 ply of bus bar ( 3/8" x 5" ) as a common where the flexible link terminated and 6300 amps breaker for the main, the lower bus duct reaches 70 degrees and the upper bus duct reaches 55 degrees when i used thermal scanner. why the temperature is not balance when the load reaches 3600 amps.

0 Answers SCM,

how to select power and control contactor .

1 Answers Bhel,

Mention the disadvantages of low power factor?

0 Answers

What happens if the secondary of the transformer is shorted?

2 Answers

What is the meaning of transformer 16 / 20 mva.

1 Answers

For more Electrical Engineering Interview Questions Click Here