Diesel genset question
Diesel genset question
(OP)
Genset in question has a voltage regulator that is very rusty and corroded. Want to run the engine. Is it best to disconnect all the connections to the vr? Don't want to do something to smoke the generator. I think its a cat scrc 140KW.





RE: Diesel genset question
Bill
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"Why not the best?"
Jimmy Carter
RE: Diesel genset question
RE: Diesel genset question
The regulator is likely DOA, and there is no CAT supplied replacement, if you're looking to revive the set, PowerTronics has replacement regulators and great technical support. I would strongly recommend a megger test and a close look at the rotor before starting, and your best long term solution may be a replacement tail end.
Hope that helps, Mike L.
RE: Diesel genset question
I had motored the engine many months ago, with the starter, after doing an oil change and prelube, with no injectors in, excellent oil pressure. The regulator looks like it would be an easy fix, all simple components, its just a rusty mess.
There is no electronic control of rpm on this that I can see. Just a mechanical governor.
RE: Diesel genset question
A quick megger test of the rotor at 250 VDC, should be above 10 megohms. a visual inspection, may sure the coating is sound, not flaking, and that the slip rings don't have huge pits if it sat in one position and the brushes got moisture under them and corroded the slip rings.
The regulators were tough and reliable, but no parts availability for a long time now, some items are still available, but not usually what you need. Whenever I deal with one of these units these days I just buy an aftermarket regulator, if time is not an issue you may be able to get it working with what is there. Not likely your CAT dealer can help, unless you're near the oil patch, last dealer guy I knew of who was commfortable with them was in Midland.
That vintage unit would have minimum electric controls, if it has an overspeed/crank terminate switch it will be the Synchro Start centrifigul switch type, unless it got retrofitted.
At that output I'm guessing a D333 is the prime mover?
Mike L.
RE: Diesel genset question