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Old 24th October 2013, 10:39 PM   #1
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Default Help identify wires please.

Hi, can somebody please help? From a old ken wood Ss I picked up.
I was thinking green = earth, red posotive....


Much appreciated.

Pa: My experience so far is with dual secondary toroidials.
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Old 26th October 2013, 04:41 AM   #2
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My best advice is to find a schematic.

Second best is to start measuring resistance between pairs of wires. Which ones are the primaries, which the secondaries?
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Old 26th October 2013, 06:27 AM   #3
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FOR MAINS TRANSFORMER ONLY

At a guess one winding is GREEN-GREEN
Another is possibly ORANGE-ORANGE.

Start as NEZBLUE states and ascertain which wires constitute a winding.

Once you have each winding labelled, tabulate the resistance of each winding.
The lower resistances will usually be the secondaries and the higher resistances the primaries. (Unless it is an output transformer).

Now, using a low voltage mains transformer, you can supply a known LOW VOLTAGE (say 5VAC), to the winding with the least resistance.

If you then measure the voltage out of each winding you will have a starting point to work with. Be careful as some of the windings may have several hundreds of volts on them.

If you publish the windings, resistance and measured voltages from above we can have a stab at helping you.
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Old 28th October 2013, 11:09 AM   #4
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Ok then will do thanks for the guidance.
Quote:
Originally Posted by KatieandDad View Post
FOR MAINS TRANSFORMER ONLY

At a guess one winding is GREEN-GREEN
Another is possibly ORANGE-ORANGE.

Start as NEZBLUE states and ascertain which wires constitute a winding.

Once you have each winding labelled, tabulate the resistance of each winding.
The lower resistances will usually be the secondaries and the higher resistances the primaries. (Unless it is an output transformer).

Now, using a low voltage mains transformer, you can supply a known LOW VOLTAGE (say 5VAC), to the winding with the least resistance.

If you then measure the voltage out of each winding you will have a starting point to work with. Be careful as some of the windings may have several hundreds of volts on them.

If you publish the windings, resistance and measured voltages from above we can have a stab at helping you.
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