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26Kw Alternator and 4-53 Detroit Diesel?


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  #1  
Old 12-01-2017, 01:57:50 PM
wbartlett1 wbartlett1 is offline
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Default 26Kw Alternator and 4-53 Detroit Diesel?

I have 26KW PTO generator that I want convert to a GENSET. It has a bell housing with a normal SAE pattern to mate to ( I am hoping) a 4-53 Detroit Diesel (non-turbo) producing approx 170 hp at 1800rpms. Is this too much engine, will it hurt the alternator? I may draw 10-12KW max in an emergency situation if my neighbours don't also plug in.

Wayne B
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Old 12-01-2017, 03:11:43 PM
Birken Vogt Birken Vogt is offline
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Default Re: 26Kw Alternator and 4-53 Detroit Diesel?

See my other post but it won't hurt the generator unless you overload the generator, then it will put the hurt on it good because it will happily drive the copper into smoking territory.

I'd like to know more details about the proposed project.
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Old 12-04-2017, 08:32:13 AM
wbartlett1 wbartlett1 is offline
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Default Re: 26Kw Alternator and 4-53 Detroit Diesel?

Quote:
Originally Posted by Birken Vogt View Post
See my other post but it won't hurt the generator unless you overload the generator, then it will put the hurt on it good because it will happily drive the copper into smoking territory.

I'd like to know more details about the proposed project.
Thank you for your information. I live in an area prone to extended power outages and wanted a backup generator to power the house and garage. I know this setup is overkill but that's what I have without going out to buy something else. The alternator is 'Aircraft Appliance and Equipment' brand and the Detroit Diesel 4-53 was formerly a backup fire pump at an airport. Both work beautifully now but have never been mated.
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Old 12-25-2017, 01:49:49 PM
Triple Jim Triple Jim is offline
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Default Re: 26Kw Alternator and 4-53 Detroit Diesel?

I suppose you could rig up a device that sensed output current and kills the engine if the alternator is overloaded for some set length of time.
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Old 12-28-2017, 02:01:25 PM
25Eagle34 25Eagle34 is offline
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Default Re: 26Kw Alternator and 4-53 Detroit Diesel?

As long as your 25KW alternator has the correct size circuit breakers, your alternator is protected no matter what size engine you have powering it. Anyway, I doubt you would ever use the 25KW for the loads you discussed unless you are trying to Power all of the neighbors. What kind of panel and breakers does your alternator have?
Good luck and have fun with your project!
Don in California
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Old 12-28-2017, 02:09:16 PM
Birken Vogt Birken Vogt is offline
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Default Re: 26Kw Alternator and 4-53 Detroit Diesel?

Normal circuit breakers don't really protect the generator unless they are undersized or super-special. Nowadays we use current sensing controllers instead which will shut down the engine if you exceed whatever you have programmed for a programmable length of time.
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Old 12-28-2017, 09:22:10 PM
Vanman Vanman is online now
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Default Re: 26Kw Alternator and 4-53 Detroit Diesel?

A 26 kw alternator?!? Is it 12 or 24 volt?? That would be like 1,000 or 2,000 amps!!!
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Old 12-28-2017, 09:55:57 PM
pegasuspinto pegasuspinto is offline
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Default Re: 26Kw Alternator and 4-53 Detroit Diesel?

The thing on the back of our 'generators' is an alternator, making AC

I AM assuming that he has looked at the data tag, and it's a 120/240 60 cycle unit.

He should also look into the gen end and make sure it's a 4 pole 1800 RPM unit, I am assuming he's removing a gearbox and I guess it COULD be a 2 pole 3600 RPM unit, if so he's pretty much screwed on this project. If he's really really lucky it's a 6 pole 1200 RPM unit.
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Old 12-29-2017, 02:03:04 AM
Vanman Vanman is online now
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Default Re: 26Kw Alternator and 4-53 Detroit Diesel?

Don't think he'll be lucky enough to find a six pole PTO generator (does such an animal exist?), but you're right, he may well have a two pole generator.

*Alternator* would not be incorrect, just sounds funny. But ALL machines that convert rotary power into electrical power are generators, even the rectified AC ones in automobiles.
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Old 12-29-2017, 12:30:57 PM
cornbinder89 cornbinder89 is offline
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Default Re: 26Kw Alternator and 4-53 Detroit Diesel?

I've also heard it this way: If the output is A/C it is an alternator, if D/C it is a generator, so even the little beasty's in your car are generators.
Kinda hard to make a hard a fast rule, as even generators produce A/C in the armature and it is mechanically turned to D/C in the commutator.
Both terms get thrown about with equal abandon.
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