Transformer Wiring
Transformer Wiring
(OP)
Is it possible to rewire a single phase isolation transformer to provide a 1:2 voltage output ratio.
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: Transformer Wiring
That is if it is a type of transformer that may be rewound. If so,it may be rewound for a 2:1 ratio.
Bill
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"Why not the best?"
Jimmy Carter
RE: Transformer Wiring
RE: Transformer Wiring
What are the ratings on the transformer?
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Transformer Wiring
RE: Transformer Wiring
Connect one primary lead to one secondary lead. Connect this point to the grounded circuit conductor. (This will avoid 240 volts to ground if done properly.)
Energise the primary.
Check the voltage from the single primary lead to the single secondary lead. If the voltage is zero, reverse the two secondary leads. You should now have 240 volts.
BEWARE THE OUTPUT IS NO LONGER ISOLATED.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Transformer Wiring
"Not a permanent installation, just a shop toy".
In the years I spent testing, troubleshooting and commissioning power systems, I often found myself having to 'lash up' equipment I had on hand to provide a function that my equipment did not support but that I needed.
Turning an isolation transformer into an autotransformer is a good example. Just remember that when YOU do this, YOU know it's no longer an 'isolation transformer' but something entirely alien to whatever the nameplate might say. It is therefore dangerous to somebody who doesn't know about your modification.
This makes for a very unsafe condition, so be very careful about leaving such a useful little beast laying around for somebody else to work with.
old field guy
RE: Transformer Wiring
I had cut an extension cord, and rewired to the transformer primaries. The green ground wire is connected to the shield cable of the transformer. I connected an outlet in series with the secondary.