Hi
Looking at purchasing the following isolation transformer. I plan to install it in a box with overload and socket etc.

http://docs-europe.electrocomponents.com/webdocs/002e/0900766b8002ea32.pdf

Looking at the ratings, it is a 500VA. That is 500VA/230VAC= 2.17Amps.
However going across the table of ratings under the Power VDE cos phi -.5 colum it gives a 2000VA rating.

I can't seem to calculate or work out where this 2000VA comes from given a pf of .5. What does it mean in terms of current draw with a pf of .5?

Thanks
mlk

 

This is not calculated, it is measured. that is why the numbers don't exactly scale when you compare several models.

It represents short term load that transformer can handle:

http://www.riedel-trafobau.de/Produkte/Informationen_Technik.php