isolation transformer needed
in [Repair]
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From: sbnjhfty on 1 Dec 2009 22:41 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.
From: hr(bob) hofmann on 1 Dec 2009 23:19 On Dec 1, 9:41 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? > 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. Do you want to power the 1000 watt supplies with the isolation transformer, or use the transformer to power your soldering iron that you use to repair the supplies?
From: N_Cook on 2 Dec 2009 07:42 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. Try builders supplier for "site transformer" and also get a variac and a RCCD/ELCB/GFCI . -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/
From: Dave Plowman (News) on 2 Dec 2009 08:32 In article <hf5ndl$4s2$1(a)news.eternal-september.org>, N_Cook <diverse(a)tcp.co.uk> wrote: > sbnjhfty <fgsdfgrr(a)asfffwer.com> wrote in message > news:%llRm.94141$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. > Try builders supplier for "site transformer" and also get a variac and a > RCCD/ELCB/GFCI . Site transformers (UK) are 240 to 110 volt. And you pay for the rugged box and outlets - not needed in the workshop. I'm not sure if a similar thing is used in the US. Where I suppose the OP is. Do wish people gave their location when asking about this sort of thing. ;-) A good quality 1000va isolating transformer isn't going to be cheap new. -- *How many roads must a man travel down before he admits he is lost? * Dave Plowman dave(a)davenoise.co.uk London SW To e-mail, change noise into sound.
From: GregS on 2 Dec 2009 09:20
In article <%llRm.94141$gg6.27160(a)newsfe25.iad>, sbnjhfty <fgsdfgrr(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? >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. Just an 'isolation transformer" means NOTHING for what you want. Most all isolation transformers sold have the secondary tied to ground. You need a service isolation transformer. You can usually get inside and remove a secondary "neutral" connection. greg |