isolation transformer needed
in [Repair]
|
From: sbnjhfty on 3 Dec 2009 08:08 Rheilly Phoull wrote: > "sbnjhfty" <fgsdfgrr(a)asfffwer.com> wrote in message > news:%llRm.94141$gg6.27160(a)newsfe25.iad... >> I'm looking for an isolation transformer for repairing small (less >> than 1000W) power supplies. I see loads of them on ebay and some are >> medical grade and inexpensive. Are these usable for what I want? >> Other than that, any tips on where to get a good deal on one? I >> don't want to spend a load as this is hobby work only. > > So what do you want it for, to cut down on noise when you contact the "live" > when working on the PSU or to avoid shocks whilst working on the gear ?? > > Regards......... Rheilly P > > > To avoid shocks.
From: bz on 3 Dec 2009 08:26 mm <NOPSAMmm2005(a)bigfoot.com> wrote in news:v3heh5l8roiu8ooio44fntl5o8g5hh7bcn(a)4ax.com: > On Wed, 2 Dec 2009 17:13:20 -0800 (PST), whit3rd <whit3rd(a)gmail.com> > wrote: > >>Yes, they are. In terms of shock hazard, you can use a GFI to >>the 1000W unit, and a small isolation transformer to run your >>oscilloscope, > > Do they make plug-in GFI's? Like they make plug in surge supressors > and plug-in adapaters from 3 pin plugs to 2 slot receptacles, it > should be easy to make a plug-in, point of use GFI, but I havent' come > across one. I have a 'short extension cord with a built in GFI'. I don't remember where I bought it but you should be able to find such. A google search for extension cord with GFI brings a bunch of hits. -- bz please pardon my infinite ignorance, the set-of-things-I-do-not-know is an infinite set.
From: Adrian C on 3 Dec 2009 09:20 whit3rd wrote: > On Dec 1, 7:41 pm, sbnjhfty <fgsdf...(a)asfffwer.com> wrote: >> I'm looking for an isolation transformer for repairing small (less >> than 1000W) power supplies. I see loads of them on ebay and some are >> medical grade and inexpensive. Are these usable for what I want? > > > Yes, they are. In terms of shock hazard, you can use a GFI to > the 1000W unit, and a small isolation transformer to run your > oscilloscope, > and get the same kind of result. This must probably again be a voltage US/UK thing - or maybe me - but if I was working on 240V live equipment I'd rather it was ALL floating through an isolation transformer than rely on the complexities and effectiveness of a GFI/RCD to prevent shocks at the bench. -- Adrian C
From: Adrian C on 3 Dec 2009 09:21 sbnjhfty wrote: > Rheilly Phoull wrote: > >> So what do you want it for, to cut down on noise when you contact the >> "live" when working on the PSU or to avoid shocks whilst working on >> the gear ?? >> > > To avoid shocks. In which country are you? -- Adrian C
From: sbnjhfty on 3 Dec 2009 09:23
Adrian C wrote: > sbnjhfty wrote: >> Rheilly Phoull wrote: >> >>> So what do you want it for, to cut down on noise when you contact the >>> "live" when working on the PSU or to avoid shocks whilst working on >>> the gear ?? >>> >> >> To avoid shocks. > > In which country are you? > USA |