In article ,
"Brenda Ann" wrote:

"The Shadow" wrote in message
...


Golly Brenda how does
210VA = 95.55W
850VA = 386.75W

wikipedia on volt-ampere
A volt-ampere in electrical terms, means the amount of apparent power in
an alternating current circuit equal to a current of one ampere at an emf
of one volt. It is equivalent to watts for non-reactive circuits.

Are you using peak, rms, or average factors?

I assume the VA figures given by John are rms values

The calculator used assumes a power factor of .70. It is right in line with
the calculations used for USP'es in their V/A to W conversions.

The reason is the power supply input impedance is not resistive and
worse the bridge diodes will only conduct on the AC peaks thus the power
factor correction and the VA being a peak value not RMS.

--
Telamon
Ventura, California