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Delco and other Low Voltage DC Light Plants Antique Generators, Light Plants, Typically 24, 32 or 48 volt although some are 110 volt. DC Lamps, Motors and appliances.

Delco and other Low Voltage DC Light Plants

Is it a 20AB3 Delco-Light Plant


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  #11  
Old 04-16-2017, 09:15:44 PM
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Mike Schweikert Mike Schweikert is offline
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Default Re: Is it a 20AB3 Delco-Light Plant

If this is a 20AB3, that is a 2000 watt 32v plant built in 1934. It used a AB sentry box on it for control, which was mounted separately on the wall. It sensed battery voltage and started when it was low and stopped at the proper voltage. Its pretty complicated for its time. I don't have a visual of that actual plant.

Hope it helps.

Mike
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Last edited by Mike Schweikert; 04-16-2017 at 09:27:50 PM.
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  #12  
Old 04-16-2017, 09:17:40 PM
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Default Re: Is it a 20AB3 Delco-Light Plant

Here is the rest of it. I'd hope others will chime in if you have anything.

Mike
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Old 04-18-2017, 11:52:16 PM
Dennis Craft Dennis Craft is offline
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Default Re: Is it a 20AB3 Delco-Light Plant

Thanks Mike, for the info (wiring diagrams). I've come to believe that this is not a 32 volt system. The field is hard wired in parallel to the armature. There are only 2 wires coming from the generator and they connect directly to the armature brushes. If this is a 110 volt DC system, my question is then how is the voltage regulated? There seems to be no automatic controls to the governor or carburetor. I'm assuming it is all manual controlled.
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Old 04-30-2017, 08:42:40 AM
George Andreasen George Andreasen is offline
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Default Re: Is it a 20AB3 Delco-Light Plant

Dennis, I looked at the schematics provided by Mike and they seem to show only two wires to the brushes. So, assuming it's a straightforward generator, wouldn't the battery voltage control the engine speed ala' other Delco Light plants? Therefore, no need for a complicated governor control system.
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Old 04-30-2017, 10:37:04 AM
Dennis Craft Dennis Craft is offline
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Angry Re: Is it a 20AB3 Delco-Light Plant

Thanks George, yesterday I found a thread here in SMOKSTAK from 2008 that discusses the engine.

https://www.smokstak.com/forum/showt...delco+cylinder

In it, Don Wiley, alias Doctor Delco, discusses what he believes it to be. He believes it is a 50AA1, which is a 5000 watt 110 volt AC unit. Don also believes the engine to be an Opel. However, in the thread, the owner only has the engine and not the complete unit. The generator is missing. Because I have the generator, which has a commutator, I know mine has to be a DC set. I sent the owner an email yesterday and he responded saying that he sold the engine a couple of years ago. Too bad, we could have worked together on it. He couldn't remember who he sold it to. If you get a chance, read the thread, it was quite informative for me.

---------- Post added at 07:37:04 AM ---------- Previous post was at 06:42:57 AM ----------

Quote:
Originally Posted by Dennis Craft View Post
In it, Don Wiley, alias Doctor Delco, discusses

Oops, I made a big mistake. Don Wiley is Delco Don, not Doctor Delco. Please accept my apologies Don and Wayne, wherever you are. And thank you for the legacy you left us.
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Old 10-06-2017, 08:26:20 PM
Dale Burkman Dale Burkman is offline
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Default Re: Is it a 20AB3 Delco-Light Plant

Does the engine have magneto or coil ignition?
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Old 10-08-2017, 09:25:45 PM
Dennis Craft Dennis Craft is offline
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Default Re: Is it a 20AB3 Delco-Light Plant

Hi Dale, this engine has a magneto. I now believe that it is designed for 110 volts DC. Sorry that the earlier pictures hosted on Photobucket are no longer available. Guess I won't use Photobucket again.
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Old 07-11-2018, 03:49:24 PM
Dennis Craft Dennis Craft is offline
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Default Re: Is it a 20AB3 Delco-Light Plant; no, probably a 20AB1

Hey guys, I'm back. I'm still looking for an engine crank for my Delco generator set. I just posted it again on engineads. We now believe that it is a model 20AB1 (2000 watt, automatic, battery, 110 volt DC).

Here is a detail of the engine end of the crank. I fabricated this from a piece of 3/4" black pipe, but it's not the real McCoy, if you know what I mean.

Also, I need a source for the correct color of red paint. Got any ideas?
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Last edited by Dennis Craft; 07-11-2018 at 03:51:45 PM. Reason: forgot something
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