[TechAssist] Re: Isolation transformer question
- From: "J Silverman" <greentron@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 4 Feb 2002 17:18:39 -0500
Maybe what you need to do is perform an electrical leakage test before
servicing equipment to protect the servicer.
Jerry Silverman
Greentron Inc
4 Newland Ave
Greenville SC 29609
864 232 3889
Fax 271 2080
mailto:greentron@xxxxxxx
----- Original Message -----
From: "Minesafe" <minesafe@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, February 04, 2002 12:10 PM
Subject: [TechAssist] Re: Isolation transformer question
>
> P.S. We don't do too many hot chassis, (no consumer stuff except
monitors)
> which is why we may not have any problems with this arrangement. Maybe
> we've just been lucky, but haven't run into any serious problems, that I
> remember. Except before we cut off the ground pin.
>
> Jim
> minesafe@xxxxxxxx
> MineSafe Electronics
> Contributing to safe mining since 1975
> ----- Original Message -----
> From: "Minesafe" <minesafe@xxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Monday, February 04, 2002 11:01 AM
> Subject: [TechAssist] Re: Isolation transformer question
>
>
> >
> > That's ok. It's worded different which helps me mull this over. I'm a
> bit
> > thick headed.
> >
> > Jim
> > minesafe@xxxxxxxx
> > MineSafe Electronics
> > Contributing to safe mining since 1975
> > ----- Original Message -----
> > From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Monday, February 04, 2002 10:44 AM
> > Subject: [TechAssist] Re: Isolation transformer question
> >
> >
> > >
> > > Re read the entire thread, that's what I said.
> > > Jim Myers
> > > jr.myers@xxxxxxxxxxx
> > > ----- Original Message -----
> > > From: "Charles Belich" <seashell@xxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Monday, February 04, 2002 1:09 PM
> > > Subject: [TechAssist] Re: Isolation transformer question
> > >
> > >
> > >
> > > Jim , if you are working on Frq drives or PLC's (mining) you should
> > pick
> > > up a Fluke scope with an insulated case . By using an isolation
> > transformer
> > > (floating your scope), your scope case is at whatever potential your
> > scope
> > > ground clip is at . Your ground clip is connected to the scope case
and
> is
> > > supposed to go directly to earth ................Charlie
> > >
> > > Charles Belich
> > > Slidewire Electronics
> > > 108 S. 1st. Ave KL
> > > Hibbing , MN 55746
> > > Mailto:seashell@xxxxxxxxxx
> > > Ph: 218-263-7090
> > > ----- Original Message -----
> > > From: "Minesafe" <minesafe@xxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Monday, February 04, 2002 7:33 AM
> > > Subject: [TechAssist] Re: Isolation transformer question
> > >
> > >
> > >
> > > We have all our scopes on their own iso transformers. But we had to
cut
> > all
> > > the grounding pins off the plugs. Why do they make an isolation
> > transformer
> > > and then give it a common ground through the ground pin on the three
> wire
> > > line cord?
> > >
> > > Jim
> > >
> > > minesafe@xxxxxxxx
> > > MineSafe Electronics
> > > Contributing to safe mining since 1975
> > > ----- Original Message -----
> > > From: "Jeff Dougherty" <jeff@xxxxxxxxxxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Sunday, February 03, 2002 2:37 PM
> > > Subject: [TechAssist] Re: Isolation transformer question
> > >
> > >
> > > >
> > > > Thanks to everyone for their input on this.
> > > > I appreciate it. Mine has only two outlets, both are protected.
> > > > Jeff
> > > >
> > > > FAX 1-413-280-0677
> > > > Jeff Dougherty
> > > > Intrepid Video & Electronics
> > > > 501 Luther Rd
> > > > Harrisburg, PA 17111
> > > > 717-909-8844
> > > > VCR tips, electronics info & general interest.
> > > > www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: "MikE" <patsvcr1@xxxxxxxxxxx>
> > > > To: <techassist@xxxxxxxxxxxxx>
> > > > Sent: Sunday, February 03, 2002 11:45 AM
> > > > Subject: [TechAssist] Re: Isolation transformer question
> > > >
> > > >
> > > > >
> > > > > ALSO - be certain not to plug your scope (or
> > > > > other test eqpt) into non-isolated outlets
> > > > > and use while using the
> > > > > iso-xfmr ... most test gear has three wire
> > > > > ac cords which can lead to unexpected smoke
> > > > > .... MikE
> > > > >
> > > > > -----Original Message-----
> > > > > From: techassist-bounce@xxxxxxxxxxxxx
> > > > > [mailto:techassist-bounce@xxxxxxxxxxxxx] On
> > > > > Behalf Of Damon
> > > > > Sent: Saturday, February 02, 2002 2:48 PM
> > > > > To: techassist@xxxxxxxxxxxxx
> > > > > Subject: [TechAssist] Re: Isolation
> > > > > transformer question
> > > > >
> > > > >
> > > > > Yes it will protect your scope from damage
> > > > > while you're working on the SMPS
> > > > > primary, as long as you don't plug in the
> > > > > scope and the TV on the same
> > > > > outlet on your transformer.
> > > > > The only thing you lose is YOUR protection
> > > > > should the transformer's
> > > > > wiring/winding decide to short to the metal
> > > > > case parts.
> > > > > Damon Brunger
> > > > > damon101@xxxxxxxxxxxxxx
> > > > > Telrad Electronic Services
> > > > > Ft Wayne, IN 46815
> > > > > ----- Original Message -----
> > > > > From: "Jeff Dougherty"
> > > > > <jeff@xxxxxxxxxxxxxxxxxx>
> > > > > To: "Techsonline" <techassist@xxxxxxxxxxxxx>
> > > > > Sent: Saturday, February 02, 2002 1:31 PM
> > > > > Subject: [TechAssist] Isolation transformer
> > > > > question
> > > > >
> > > > >
> > > > > >
> > > > > > Can anyone tell me if an isolation
> > > > > transformer can still protect when
> > > > > > plugged into an ungrounded-two prong
> > > > > outlet, such as in older homes?
> > > > > > Thank you.
> > > > > > Jeff
> > > > > >
> > > > > > FAX 1-413-280-0677
> > > > > > Jeff Dougherty
> > > > > > Intrepid Video & Electronics
> > > > > > 501 Luther Rd
> > > > > > Harrisburg, PA 17111
> > > > > > 717-909-8844
> > > > > > VCR tips, electronics info & general
> > > > > interest.
> > > > > > www.intrepid-video.com www.tech-repair.net
> > > > > www.thetoolcaddy.com
> > > > > >
> > > > > >
> > > > > >
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> > > > > ---
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