What is the difference between the watt hour meter and Var hour meter in term

What is the difference between the watt hour meter and Var
hour meter in terms of internal connection and work theory .
ie "When the meter records watt-hour an when the meter
records var hours ??"

Question Posted / saadsms

13 Answers
19327 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

What is the difference between the watt hour meter and Var hour meter in terms of internal connec..

Answer / k.prakashchandra

In case of 1 phase , the voltage is shifted by 90' and in 3
phase, the voltage of other two phases is applied.

Is This Answer Correct ?

0 Yes

1 No

What is the difference between the watt hour meter and Var hour meter in terms of internal connec..

Answer / k.prakashchandra

In power triangle VA x cos theta is active power and VA x
sin theta is reactive power.

Is This Answer Correct ?

0 Yes

1 No

What is the difference between the watt hour meter and Var hour meter in terms of internal connec..

Answer / rafael barreto

The alternating current has two compents: one active and
one reactive. The active component produces work, it moves
the fans, the refrigerator, machine tools etc. The reactive
compoent is useless, but necessary to sustain the magnetic
fields of the induction devices. The watt-hour meter reads
the active component of the current. Both active and
reactive compoents load the feeder, therefore we might be
interested in knowing how large the reactive component isIn
that case a reactive meter is used to determine the
reactive load. The var-hour meter does not read "energy",
as energy ir work related and reactive power does not
produce useful work. For more details see "Reacive Power
Management by R. Barreto in Amazon, Kindle version.

Is This Answer Correct ?

0 Yes

1 No

Post New Answer

More Electrical Engineering Interview Questions

why the conservater tank alwes made upper side of transformer???

3 Answers

what is the main use of ac and dc drives ? it is only used for speed variation or for power saver also?

1 Answers

how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING) I O (current operating)?

0 Answers

why we use ac system in india why not dc

3 Answers

What do u understand voltage reg. of an alternator?

0 Answers IOCL,

HOW DO A DISTANCE RELAY SENSES THE FAULTY ZONE.

5 Answers

What is the maximum breakdown voltage of 11KVA and 66 KVA power line and how it is calculated?

0 Answers Anglo Platinum, Narnarayan Electrical,

phase clearance between phase to phase and earth

11 Answers

What is deference between MCB & MCCB & ISOLATOR

0 Answers Prakash Industries, Standard Chartered,

How can we reduce the reactive power consumption of your 12.5 MVA power transformer.

4 Answers

how air lock will be removed from generators, how it happens?

1 Answers ABC Engineering,

hello friends.. I have a doubt regarding the operation of dc machines.. I studied in a text book that a dc machine can be used as a generator and as a motor.. is this possible? If so,please send me the info about this topic.. you can also send your info to my mail.

0 Answers Bhel, CVL,

For more Electrical Engineering Interview Questions Click Here