if we convert ampers into kwh or mwh ,which one formula use by us,pls tell me?

if we convert ampers into kwh or mwh ,which one formula use
by us,pls tell me?

Question Posted / manoj

3 Answers
8233 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

if we convert ampers into kwh or mwh ,which one formula use by us,pls tell me?..

Answer / omar aziz

Look , Always try to understand what quantities you have
and their significance. This will help you derive other
quantities yourself using the first principles. Lets derive
KWhr from current I !

Firstly you need to know the voltage at which this current
is drawn from its supply. V

Once you have this info you can find the power flow = V x I
this is in W if you use SI units throughout

Divide it by 1000 to get KW

KWh = unit of energy therfore its Power x time

Now how long would your current be drawn for. say its a fan
drawing 2 Amps and you keep it on for 5 hrs at 240V

(240V x 2A x 5hr)/1000 = 2.4 KWhr

Is This Answer Correct ?

16 Yes

6 No

if we convert ampers into kwh or mwh ,which one formula use by us,pls tell me?..

Answer / virendra joshi

KWH = watt x no of hour /1000

W = v x I for single phase
w = 1.73 x VL x IL x Cos@

Is This Answer Correct ?

6 Yes

0 No

if we convert ampers into kwh or mwh ,which one formula use by us,pls tell me?..

Answer / s.arul

ohms law: V = IR
you know the current rating, you take the machine
resistense using megger. calculate the voltage rating of
machine.
1 phase: power = V * I * power factor (watts)
3 phase: power = 1.732 * V * I * power factor (watts)
ENERGY (KWH) = POWER * TIME
so, we can calculate the KWH or MWH of the machine....

Is This Answer Correct ?

1 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

difference between turns ratio and transformation ratio?

2 Answers

Will MCB tripped off, if there is an electric shock to Human body?

9 Answers

Is an SCR semi controlled device?

4 Answers IOCL,

What is meant by earthhing of a magnetic flow meter and when to use empty pipe detection?

0 Answers

how we can know which is Lv side and HV side of transformer by just seeing it?

7 Answers

What is Exact meaning for Full load Efficiency and Maximum Efficiency of Transformer? Is there any Difference between? If yes ,please provide with formulae?

2 Answers Techno Labs,

why firewall is build up between two transformer (220/11kv,50MVA)?what should be the firewall height?what is the clearance between firewall and transformer?

2 Answers Siemens, Tous Stadt,

can we done C.T.sc at output? if yes y,if no y?

3 Answers

Is there any reason that we get shock on touching phase wire because the earth is at neutral potential? Is there any reason that the earth is at neutral potential because the neutral is earthed in apower station

0 Answers

A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate rotor frequency. A 50 Hz B 0 Hz C 4 Hz D 6 Hz

3 Answers

What will happen if the interpoles in case of a generator have opposite polarities to that behind it in the direction of rotation ?

1 Answers

working principle of oil startar

0 Answers

For more Electrical Engineering Interview Questions Click Here