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Lucus EL3 Generator question #540668 04/30/14 7:03 pm
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Red Lapierre Offline OP
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Not knowing the history of the generator it has an output of 6 to 7 volt at idle and at slight rev it goes up to 25 to 30 volts (using a digital meter)with F and D tied together. Is it possible it could have been change to be 12v output? Is there any way to check with taking apart? ( yes I know it can hurt armature rev to high) Or is it possible a 6v gen could put out voltage as high as 25v to 30v?

Thanks for the help!
Red


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76 CB 125 Honda
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Re: Lucus EL3 Generator question [Re: Red Lapierre] #540676 04/30/14 7:38 pm
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gREgg-K Offline
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Red,
The answer depends a lot on the actual speeds at which you were running the E3L. the output you saw at an idle sounds a bit low for one that's been converted to 12 volts ... I would have expected to see something closer to 10 volts at an idle, but the 25 - 30 volts you report at speeds just a little above idle, sounds high for a 6 volt E3L.

If the field winding has been converted to a 12 volt type, the ones I'm seeing these days measure about 10 ohms, whereas an original 6 volt one will measure about 3 ohms. A 12V armature is more difficult to determine: it will have slightly finer wire than a 6V type, but the difference is hard to discern with an untrained eye.

Try cleaning up the brushes and commutator to see if that makes any difference in the output at an idle.

..Gregg


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Re: Lucus EL3 Generator question [Re: Red Lapierre] #540681 04/30/14 8:10 pm
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Red Lapierre Offline OP
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thank guys will do ohm test


57 A10 GF
61 A7
61 A10 GF
63 A10 SR
76 CB 125 Honda
76 FLH
2012 FLHTP
Re: Lucus EL3 Generator question [Re: Red Lapierre] #541268 05/04/14 5:47 pm
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Swan Offline
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I recently spent many frustrating hours testing my charging system and wiring connections to find why there was no charge. after I repolarized my generator/dynamo everything worked beautifully. Repolarize your before troubleshooting and testing.


1966 Triton
1962 BSA DBD34 Gold Star
1966 Triumph Bonneville

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