Why is it preferred to use a wattmeter(s) to measure power in three phase syst

Why is it preferred to use a wattmeter(s) to measure power
in three phase systems rather than using a combination of
other instruments e.g. voltmeters, ammeters etc?

Question Posted / electricalchris

2 Answers
6288 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

Why is it preferred to use a wattmeter(s) to measure power in three phase systems rather than usin..

Answer / vithal k

by formula one can derive the power through Voltmeter &
Ammeter reading but its impossible to project the power
factor at the time of reading we r taking for both the meter.

Is This Answer Correct ?

8 Yes

1 No

Why is it preferred to use a wattmeter(s) to measure power in three phase systems rather than usin..

Answer / ravikumar.g

The wattmeter is using for find out the power in 3 phase
and single phase in differnet formulas.

In the voltmeter and ammeter reading can also find out the
power to caluculate the formulas.

Is This Answer Correct ?

0 Yes

6 No

Post New Answer

More Electrical Engineering Interview Questions

what do you mean by power factor ? in new view

3 Answers BDL,

Why Lighting transformers are used? what will be the current if lightings connected through direct raw power?

1 Answers BMM,

HOW DOES ONE SELECT A TRANSFORMER PHASOR GROUP IE, WHETHER A STAR-DELTA TR OR A STAR-STAR OR A DELTA-DELTA, ETC. TRANSFORMER IS MORE SUITABLE FOR A PARTICULAR KIND OF LOAD OR WORKING CONDITION???

3 Answers KPTCL,

why sec of ct should be kept shorted

2 Answers Enercon,

Plz tell me how we can find that particular company has vacancy or not

0 Answers L&T,

I have 4 DG set with 1500KVA rating. system breakers are 11KV & alternator are 415 Volts. i want to Know what is max. resistance for body earthing & 415 & 11KV V Neuteal earthing. my fault current is 14 times for 2 sec.

2 Answers

how to select diiferent power transformers of same capacity on no load loss and full load loss by economical point of view.?

0 Answers

when we have to use UPF wattmeter and LPF wattmeter? what is the difference between UPF and LPF wattmeter in terms of construction?

0 Answers

where we sense the fault from the transmission lines?any operation example for distance relay?rear panel connection for this relay?

1 Answers

what are the safety measures of induction motor?

3 Answers

What is min and max voltage between earth and neutral/phase if it perfect earthing?

37 Answers Epoch, ISS, ITC Infotech, L&T, Power Works, Statex, Sterlite, Wipro,

What is Diff btw Fire Alarm & VESDA System???

0 Answers EFY, Emerson,

For more Electrical Engineering Interview Questions Click Here