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Wisconsin THD natural gas generator


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  #1  
Old 03-21-2013, 03:35:54 PM
MXB MXB is offline
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Default Wisconsin THD natural gas generator

I have no idea what I have and was hoping someone can help. I was offered this generator from a friend. I can't use it unless I can convert it to propane. I also need to know its capacity, so I can determine if it's any better than the 7.5 KW gas generator I use. The only nameplate on the unit states it's a Wisconsin model THD, spec #382502, serial #6021469. No other markings/stamps on the motor or generator. It was connected to a 50 amp throwover and 50 amp lighting contactor, although the cable from the generator is 12 gauge 3 wire. Does anyone know of its capacity (amps/KW), can it run on propane (and at what expense), and is it worth the effort to put into use as a whole house generator. Thanks, Mark
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  #2  
Old 03-21-2013, 05:30:59 PM
Ed Sparks Ed Sparks is offline
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Default Re: Wisconsin THD natural gas generator

It's already set up for vapor fuel. in your first photo it has a nat gas regulator connected with 3/4" iron pipe to a flex hose.
You would need a demand regulator and solenoid safety valve, in addition to a primary regulator at the tank and secondary regulator to bring it down to 11 " WC at the set.

Can't help on size of generator end, but would guess a twin cyl engine would be 10+ hp so at least 5-6 kw, & possibly larger.
Is there any ID plate on the gen end?

A quick search here at the stak shows the THD as a 16 Hp so it's possible the gen end may be 8-10 kw.
General rule of thumb is to have 2 hp per KW out gen output.
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Old 03-21-2013, 05:55:55 PM
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EricWood EricWood is offline
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Default Re: Wisconsin THD natural gas generator

Its a 10KW Winco. That Wisconsin screams along at 3600 rpms, and generates a lot of heat. It is not quiet.

Do you have the transfer switch? Not that its any good, but your data plate was on it. And, you could look at the contactors and see if they were three pole or two pole. Used to see these in small nursing homes, and most were 208 Volt 3-phase only. If this one is three phase, you won't be able to re-wire it for 240 single. So, you'd only have two of three phases, for 6 KW capacity. Hoping since you said there's only three wires coming out of it, its a single phase unit.
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Old 03-21-2013, 06:37:56 PM
jpatrickc jpatrickc is offline
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Default Re: Wisconsin THD natural gas generator

The carburetor almost looks like it integrates a demand regulator built into the button of it. I am not familiar with the carb but it just looks like a regulator built in.
Hopefully one of the experts will comment.

Pat
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Old 03-21-2013, 07:20:52 PM
Daverepair Daverepair is offline
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Default Re: Wisconsin THD natural gas generator

If the transfer switch is the same color and or Winco than, as stated above it may have a Tag with the model and spec. It looks like an Impco carburetor. A damand regulator would be needed.
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Old 03-21-2013, 08:21:09 PM
Jim Rankin Jim Rankin is offline
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Default Re: Wisconsin THD natural gas generator

Quote:
Originally Posted by jpatrickc View Post
The carburetor almost looks like it integrates a demand regulator built into the button of it. I am not familiar with the carb but it just looks like a regulator built in.
Hopefully one of the experts will comment.

Pat
There does seem to be an added layer of aluminum there on the IMPCO updraft mixer. However, I don't think I have ever seen or heard of one being made like that. Maybe someone had to replace a part on the mixer and that's why it stands out so.
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Old 03-21-2013, 10:17:41 PM
BGunn BGunn is offline
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Default Re: Wisconsin THD natural gas generator

That's an Algas carburetor with a vacuum switch on the bottom.
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Old 03-21-2013, 10:20:37 PM
Jack Hottel Jack Hottel is offline
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Default Re: Wisconsin THD natural gas generator

First picture shows the solenoid fuel valve and Maxitrol demand regulator. Last pic shows the carb, a common setup on Wisconsin engines.
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Old 03-22-2013, 04:52:19 PM
MXB MXB is offline
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Default Re: Wisconsin THD natural gas generator

The transfer panel is still in the old building, but I do remember the lighting contactor was 240v. I will have to retieve it to see if a data plate is still atached. Thanks, your info was helpful. I will reply in a few days hopefully with more info

Thanks for the conversion info. Do you know if the conversion is an expensive venture? Also, I will be checking the transfer panel it was connected to for any additional data plate info, and will reply with my findings.

The transfer switch is the same color, but is still mounted in the old building the generator was taken from. I will go back and see if the panel has a data plate.
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Old 04-24-2013, 10:36:53 PM
dkamp dkamp is offline
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Default Re: Wisconsin THD natural gas generator

More than likely, if you have a propane source, with a first-stage regulator (at the tank- drops it to 10psi) and a second stage regulator (at the side of your building, drops it to 11" of WATER COLUMN)... and connect this to the Maxitrol... then all you'll need to do at that point, is make some adjustments to the LOAD ADJUSTMENT (on the mixer) and perhaps the Maxitro's bias adjustment (so it doesn't exhibit too much 'gain', and locks off fuel when the engine's not running).

Natural gas has a lower BTU output per volume, than propane... that means that when using propane, you need to reduce the amount of fuel, to keep from over-fueling the engine.
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