On 2/10/2012 8:17 AM, JW wrote:
Hi all,

Is there any reason that a 120VAC to 120VAC isolation transformer would
draw 2.54A on its primary when there is no load present on it's secondary?

Part reference:
http://www.temcoindustrialpower.com/...rs/FT2036.html

datasheet:
http://attachments.temcoindustrialpo...120x240Pri.pdf

I finally got around to wiring this transformer, and I noticed something
that doesn't seem quite right to me. I have it wired for 120VAC (H1
connected to H3 and H2 connected to H4) and it seems to be working as I
get about 120VAC on the secondary, ( wired X1 to X3 and X2 to X4) but with
no load on the secondary, the transformer is drawing 2.54 Amps.

Looking for a sanity check I guess. I'm beginning to think the thing may
be defective... Email to the Temco has produced no response as of yet.

It's not unusual for a transformer to draw some amps when unloaded.
That's what inductors do. The current should be out of phase with the
voltage.
What you care about is POWER. Measure the RMS power consumed by the
transformer. That's what counts.

If it's actually dissipating 300W, it will get very warm.