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SX460 Voltage Regulator for Old Onan Generators


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  #21  
Old 12-11-2014, 04:59:41 PM
PopsGarage PopsGarage is offline
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Default Re: SX460 Voltage Regulator for Old Onan Generators

Thank You the arcing at the brushes could be a concern they should be solid on the slip rings
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  #22  
Old 12-11-2014, 05:53:06 PM
Nazrat Nazrat is offline
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Default Re: SX460 Voltage Regulator for Old Onan Generators

Here's the simplest version of the instructions that I can find:

http://www.dieselgeneratorsmiami.com...-REGULATOR.PDF

-Tad
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  #23  
Old 12-11-2014, 07:10:49 PM
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Jim McIntyre Jim McIntyre is offline
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Default Re: SX460 Voltage Regulator for Old Onan Generators

Watch out for the 380V reference in that one - They're referring to the line-to-line voltage, but connect the regulator from line to neutral, so it sees 220V.

I had a link to Cummins' manual in my first post of this thread...
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  #24  
Old 01-06-2015, 12:20:11 AM
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BigBlockChev BigBlockChev is offline
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Default Re: SX460 Voltage Regulator for Old Onan Generators

Well now that the Hockey game is over I can go back to thinking about generators. I finally got around to installing the SX460 on my 12Kw DJC. Pretty darn simple removed the original VR board from the housing , put 5 ohm 25W resistor in series with the existing exciter breaker to bring the total up to the 17ohm range. Put the 110V jumper on the regulator in the indicated spot. Mounted the VR on a couple of straps in the original position. Connected it up to the original terminal connectors and were done. I adjusted the voltage fully clockwise as per instructions and fired up the gen . Works perfect , I measured 400Ma exciter current with a 1500W load on the gen, went up another 100Ma when I put another 1500W on load. I had 2 running gens but only 1 VR board , now they both work. I am ordering a spare as they are cheap enough to keep on hand. Thanks for everyones help. Cheers Dan
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  #25  
Old 04-07-2017, 08:46:07 AM
mheltunen mheltunen is offline
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Default Re: SX460 Voltage Regulator for Old Onan Generators

I am looking into installing a sx460 into my 7.5 JB as well. My question is where to hook up the resistor to bring the field resistance down to the recommended level. I'm assuming from what I have rea in earlier posts that it is wired in series on either the F1 or F2 wire but unclear which one (or does it matter). Thanks
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Old 04-07-2017, 05:42:08 PM
Dennis19508 Dennis19508 is offline
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Default Re: SX460 Voltage Regulator for Old Onan Generators

It doesn't matter. But as pointed out it is also good to keep the field breaker as well - that just goes in series with the field resistor and field winding.
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  #27  
Old 04-07-2017, 11:02:34 PM
mheltunen mheltunen is offline
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Default Re: SX460 Voltage Regulator for Old Onan Generators

Yes, good point Dennis. I will do that. Ordered the sx460 up tonite and a 5 ohm 25 watt resistor. Waiting on a few other parts and hopefully will have it running soon. Still hunting for a few items but I don't need it operational for a while.
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  #28  
Old 04-11-2017, 05:08:55 PM
mheltunen mheltunen is offline
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Default Re: SX460 Voltage Regulator for Old Onan Generators

Recived my sx460 today. The directions are a tad unclear but I will try to explain what I think has to be done. My jb has 4 leads going to the voltage regulator and they are labeled : F1 , F2 , 1 , 2. On my picture I circled in pink where the F1 and F2 leads will go ( a resistor will be wired in series with the F1 lead. For the remaining 1 ,2 leads I believe they will go to the terminals circled in white. Sounds like on either the 1 or 2 lead a 5A 250V fuse should be wired in series. Any idea which lead should fuse should be on and which of the 2 terminals (circled in white) do the 1 and 2 wires lead to. Again all help is greatly appreciated.
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  #29  
Old 04-11-2017, 06:06:50 PM
Leon N. Leon N. is offline
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Default Re: SX460 Voltage Regulator for Old Onan Generators

Re post 21.Unles I am missing something, if this post is talking about replacing a VR for a generator which has slip rings and it is a JB, then the V & R values being discussed are incorrect.
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  #30  
Old 04-11-2017, 06:19:46 PM
mheltunen mheltunen is offline
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Default Re: SX460 Voltage Regulator for Old Onan Generators

My mistake Leon. Rookie error I posted this under the wrong post.

Perhaps I mis understand the etiquette but I thought this was a thread for the sx460 voltage regulators.
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