[Amps] Isolation Transformer

[Jim Carr]

The purpose of the ground wire in a 120v/240v branch circuit is to blow the 
fuse if a hot wire touches the metal cabinet. The RF grounding system is a 
horse of another color and usually has it's own ground rod seperate from the 
service main.
Jim
N7FCF
----- Original Message ----- 
From: "David C. Hallam" <dhallam at rapidsys.com>
To: "AMPS List" <amps at contesting.com>
Sent: Sunday, December 13, 2009 3:42 PM
Subject: [Amps] Isolation Transformer


>I recently picked up a medical grade 3KVA toroidal isolation
> transformer.  It has dual primaries and secondaries so in addition to
> being a isolation transformer it can be used as a step up/down
> transformer.  I had two ideas in mind.  One was to use it as a 1:1
> isolation transformer when working on radios with a hot chassis.  The
> other was to use it as a 2:1 step down transformer for a linear map I
> have with a 120V primary transformer.  This thing draws too much current
> to use on 120V unless you have a special dedicated line.  With this
> transformer I could step down a 240V line to 120V.  Since this is an
> isolation transformer, I am assuming I would need to have a direct
> ground connection for the amp.  I am I correct or is something else 
> needed?
>
> David
> KW4DH
> -- 
> National Health Insurance
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>
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