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Old 14th June 2012, 08:10 PM   #1
Veggiel is offline Veggiel  Belgium
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Default Transformer mains wiring

I have a transformer with the following connection points.

0 --- 110V --- 0 --- 110V --- 130V

What would be the best way of wiring it for the mains in Belgium (230V)?
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Old 15th June 2012, 04:13 AM   #2
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Location: Dona paula, Goa
All the mains supplies have a tolerance and 230V is never rigid.

So connect 110 to zero of the other winding. Leave the fourth 110V tap unconnected and connect mains at extreme 0 and 130V taps.

Gajanan Phadte
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Old 15th June 2012, 10:12 AM   #3
DF96 is offline DF96  England
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If you can do it safely, measure what your typical mains voltage is. I suspect you will find it is nearer 220V than 230V. The 230V is an EU myth, to give the appearance of harmonisation. In practice most of Europe is still on 220V, and the UK (and Ireland?) are still on 240V.
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Old 15th June 2012, 10:20 AM   #4
Veggiel is offline Veggiel  Belgium
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If I measure it I get between 227V - 228V, so that seems to be closer to 230V.
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Old 15th June 2012, 10:35 AM   #5
DF96 is offline DF96  England
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OK, so you now have to choose between using the 220V connection and having secondary voltages about 3% high or the 240V connection and having secondary voltages about 5% low. It depends on your application. Unless it is a poor quality transformer it should cope OK with 228V on the 220V primary, especially when loaded.
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Old 15th June 2012, 11:52 AM   #6
AndrewT is offline AndrewT  Scotland
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the stated
Quote:
0 --- 110V --- 0 --- 110V --- 130V
does not give any indication of which tappings are on which winding.

Please clarify what you have !!!!!!!!!!!!

Build up a mains bulb tester.
Use it every time to power up any and every mains powered equipment that you are building or modifying. Every Time, no exceptions.
__________________
regards Andrew T.
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Old 15th June 2012, 11:58 AM   #7
Veggiel is offline Veggiel  Belgium
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I bought the transformer from farnell here is a link: D3652. - DAGNALL ELECTRONICS - TRANSFORMER, 20VA 2X 15V | Farnell BelgiŽ

I have made a bulb tester for a My Ref C, so I will use that to test the setup.
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