Transformer Selection

[juju]

I have seen an excel sheet in calculator to calculate the size of transformer.
There are option to put the vales of Kw,PF,Qty and Equipment D.F.
I could not understand what is D.F.
What is the equation to calculate the D.F and equation to calculate the total load D.F?

 

[Haji]

D.F=demand factor.
This discussion may help you to get an idea of how to calculate D.F
http://forums.mikeholt.com/showthread.php?t=85053