On Tuesday 26 November 2024 09:53:47 am Ke-Fong Lin via groups.io wrote:
I may have to work on the "mains connected" (120VAC US or 220VAC Europe) side.
So I just want to be sure that I would be safe with a differential probe, and if I use a diff probe, an isolation transformer wouldn't be needed.
An isolation transformer is always a good idea when working on mains-connected circuits. If nothing else, a couple of regular transformers connected in cascade with the second "primary" being the mains source for what you're working on will do.
Seems that "curious marc" is using a variac as some form of isolation transformer:
I haven't looked at the link, but a variac is NOT an isolation transformer.
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, ?a critter that can
be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters"
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Information is more dangerous than cannon to a society ruled by lies. --James
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