Hello,
is it normal that an isolation transformer gets very hot (~60C) even withou=
t
a load?

I have built one using two spare 160VA transformers: 230V->32V =3D 32V->230=
V of
course the two transformers are identical, just wired as pri->sec=3Dsec->pr=
i

I needed it since my oscilloscope is not isolated from ground, and this mak=
es
some measuring impossibile without the isolation transformer.

Meanwhile I noticed that my 'scope is CAT II, i.e. designed to work on circ=
uits
directly connected to the low-voltage installation (MAINS).

Could there be any problems about floating the ground connection on mains
powered scopes? I have been using it this way for days but I haven't died
yet, was it just out of luck? :D However I get much more "usefulness" from
my scope through the isolation transformer and no ground. :P

But then I thought: did I really need the isolation transformer? Couldn't
I just cut the 'scope's ground wire instead?? :P

With kind regards,
Mario

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