Motor calculations

[CBCraig]

Hi all,

I am after finding out the calculation of the running currents of single and three phase motors. If anyone could help me or point me in the right direction it would be much appreciated.

Thanks in advance
Craig

 

[ackbarthestar]

Treat it as any other load, with the exceptions that you will have:
1/ a power factor
2/ efficiency
3/ start up currents
and maybe
4/ Winding arrangements (star /delta)

The place to look will be on the motor's face plate. There you find at least two of the quantities listed below:
1/ Power rating in Watts
2/ PF
3/ Power rating in VA

You may even find flc, I, in Amps....

Now, I'm available for private consultations, my rates are exorbitant and i charge by the minute, not unreasonable really because its now a bank holiday and I'm probably cheaper than BT per minute.

 

[Guitarist]

I can help you too, and will charge 10p less per hour than ackbar.
As he said, check the motor plate.

 

[Moses]

I can help you too, and will charge 10p less per hour than ackbar.
As he said, check the motor plate.

Look mate even though its a bank holiday weekend,
I am willing to do a very competitive offer , especially for you,
I will beat Guitarist's rate by 5p per minute!

 

[spark 68]

The race to the bottom begins lol,
Sparkies undercutting each other, whatever next!::

 

[Guitarist]

My Son has been training as an electrician for 4 weeks... Next week he will be fully qualified and says he will help you for £5, but you don't get a certificate.

 

[trev]

4 weeks...phhttt, Slacker

 

[Moses]

Tut tut, working without issuing a cert??????

 

[Knobhead]

RIGHT who's using MY spreadsheet!

Given freely to those I thought I could trust!

 

[ackbarthestar]

Mine is a genuine offer. The others are cashing in probably because they have been influenced by so many cold-caller campaigns.

My rates are exorbitant, because I'm worth it.
then, of course, you might want to smell my aftershave first !