Homebrew PCBs

Strictly speaking there are differences between an industrial control
transformer and an isolation transformer.
The isolation is often stronger with a dedicated isolation
transformer, sometimes the windings are even physically separated in
different chambers or on different shanks, instead of on top of each
other.
As a result coupling capacitance is lower with an isolation
transformer, but also magnetic coupling is worse.

So in some situations you may require an actual isolation transformer.

Many high quality control transformers fulfill the minimum
requirements for a safety isolation transformer, but always check the
datasheet.

ST

On Thu, Feb 25, 2016 at 5:15 PM, Brad Thompson
brad.thompson@... [Homebrew_PCBs]
<Homebrew_PCBs@yahoogroups.com> wrote:
> If you need to power a 120VAC item from a 240 VAC
> line (or vice versa), you can use
> a transformer **with isolated windings** designed exactly for this
> purpose. These are sometimes referred to as
> "industrial control transformers".
>
> 73--
>
> Brad  AA1IP
>
>