In article , "Dave Plowman (News)" wrote:
In article ,
Phil Allison wrote:

"JW"

Can anyone recommend a good isolation transformer for sale on-line?

** What kind ??

There are two:

1. Galvanic isolation - for use on a service bench.

2. Neutral conductor isolation.

Most you see offered for sale in the USA are of the *second* kind.



.... Phil

Surely an isolation transformer is just that - a one to one device with DC
isolation between windings. How it is subsequently configured is a
different matter. One use is where you can't be sure the line and neutral
of the supply are connected correctly - if they have a ground reference.


An isolation transfor is typically 1:1.1 in real life.
Its acts as 1:1 with FULL load. Well all transformers are rated FULL LOAD.

They really need to start calling these things different names.
A regular "isolation transformer", and they should not be calling it that,
is NOT ground isolated since the secondary is tied to ground.
The purpose of this transformer is noise reduction, period, using an isolation
transformer.

Find another name.

greg