Power Problem

Here is one site for you.

http://www.crgwest.com/colo_toolkit/ExplainingWattsandVoltAmps.htm

Welcome Guest,

If you like this site, i wonder what stops you from registering...

anyway you have not provided a very important input, and that is voltage....

you need kva so volts as well as amperes have to be known....right...

I forgot to sign in is all.

DID YOU GO ALL THE WAY TO THE BOTTOM OF THAT WEB SITE??

FORULMAS THERE

KVA Rating = Voltage x Current

consider 10 amp insted of 06 amp for factor of safety

UNDER POWERING DEVICES CAUSES THEM TO HEAT UP AND SHORTEN THEIR USEFUL LIFE. We always supply extra to prevent that damage.

Hi

The method to calculate depends on what is the end use

but for all that we can do is list down all the equipments those are to be powered

Make an Excel sheet and write down in column 1 the name of the equipment

column 2 the voltage for the equipment

coumn 3 the average current

column 4 the Peak current ( starting current in case )

column 5 the Surge current as specified in the operations manual

Column 6 the Power factor

Column 7 now calculate the continuos power required using Average Current (V x A x pf)

Column 8 Caluculate the peak power using the Peak or surge current as the case may be but use whichever is maximum

Now you would get two results one which would help you to design your Power requirement along with the trip setting details and other for continous opeartion giving you details of the HVAC and other requirements.

Trust this would help you.

We need more input. 6 amps at 5v or 6 amps at 13.2KV. It makes a wee bit of a difference. What kind of loads are they? Poor power factor inductive? or closer to unity resistive or somewhere in beween?

Thanks, you all for the your replies to my problem.

With your help I have sorted it out - I will be using a 3kVA UPS (10 Amps) to keep the instruments up and safe during power cuts.

Thanks all and I look forward to your assitance in the future.

jonjon