In article , (GregS) wrote:
In article , JW
wrote:
On Fri, 11 Jun 2010 08:24:36 -0500 Chuck wrote in Message
id: :

On Thu, 10 Jun 2010 09:44:12 -0400, JW wrote:

Can anyone recommend a good isolation transformer for sale on-line?
Need one that will handle 5 amps or so at 120VAC, and have a standard AC
plug at the outlet. Prefer one for less than $100 or so, unless that seems
unreasonable. Found one at Mouser for $114 but that's only good for 1.25A.
Getting lots of irrelevant hits on google...

Thanks.


MCM Electronics has one. Chuck

Thanks Chuck. Looking at these for the moment:
http://www.mcmelectronics.com/produc...ON--IS500-/28-
1
0160
http://www.mcmelectronics.com/produc...-1097-/72-1097

The Tripp-Lite device has secondary attached to GROUND. This is NOT
want you want. All Tripp-Lite supplies are attached to ground forming a new
neutral to
make a noise reduction device, period.

This is the description in the specs...............

Neutral to ground bonding at the secondary eliminates common mode noise and provides an isolated ground reference for sensitive
equipment

What they really mean is a new ground to neutral reference. They make it confusing.
For testing chassis, you need a ground isolating isolation transformer.

greg

I hope the second device has ground isolation.

Greg