I've got a slightly newer Cliff quicktest somewhere. I think I've only used it a few times as I rarely do anything mains side that isn't dead simple or encapsulated. So much so I actually got rid of my scariac and isolation transformer a couple of years back now.
As for megger, yeah something like that would do the job. I did notice the Chinese have come up with some options in the £30 bracket though which are interesting. Good to 1KV which is fine for giving the odd hooky looking transformer a poke before you kill yourself with it.
Yes, I borrowed the pic, mine's a fairly new RS branded something, and it is useful a couple times per year. A very British thing it is. I learnt about it in the 90s when I worked at a small disco and AV install company. We imported quite a lot of kit from the UK, and the boss had seen a Safebloc on a visit to Jem, the smoke machine manufacturer now a part of Samsung via a series of take-overs..
The Evershed & Vignoles one is internally limited to 500V, so while painful, I mean "educational", might not fill the need for 1KV, especially so since it's a cranker. (a mighty useless transfer standard, that, unless you're very good at precision cranking.
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