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Is there a reduced price if you trade in an engine in need of rebuiding?

The general principal I use for things like that is to make the sound bounce off sound absorbent material as much as practical. You can get sound absorbing foam and/or fiberglass sheets. The foam with triangular projections works better on lower frequency noise than plain foam, and the bigger...

JEK, the WIKI has information on the filters. Scroll down to the heading "Maintenance Parts:" http://www.steelsoldiers.com/showthread.php?62648-MEP-002A-and-003A&highlight=wiki

When you measured 47 Hz, you also measured the engine RPM, which was 1410. Get the frequency and voltage correct before connecting a load. All three phases will always read the same frequency. Have you looked at the motor on your lathe? Even fairly large ones wired for 480V can often...

Yes screejunk, as I said, I'm with you as far as not running at a speed other than 1800 RPM with a load. The question that started the thread was how to prevent damage if the generator needs to be run slower than 1800 RPM while diagnosing engine problems. I ran the test with no load because...

I was assuming a power factor of 1 for simplicity, and also since the load might be resistive and actually have a power factor of 1. In any case, thanks, you answered my question: You don't push that generator to 50A 208 3 phase.

3-phase 50A 208V = 18 KW. Do you really run MEP-003As that hard? Maybe you meant 50A 240V single phase = 12 kW?

It may just be that I'm the only one around with nothing to do on a Sunday evening. :-P

Well, you're certainly welcome Rick, but I don't feel that I risked my equipment. Logic said there would be no harm, and the meter immediately confirmed that when I slowed down the engine. I don't know of any reason that the battery charging system would be harmed by running below 1800 RPM any...

Yes, it's inside my house at the box. Installing the meters at the generator has its advantages too, especially if the unit will be mobile. I look forward to photos of your setup. Isn't it great when good stuff goes to the dumpster?

OK, I just ran my MEP-003A. First I disconnected the output of the main transistor at terminal 17 of the regulator board. This terminal sinks the current through the exciter field control transformer CVT1 supplied from terminal 14, which is in turn supplied by rectifying diodes CR6 and CR7...

Gary, I checked the -12 manual for both the 002 and the 003. It's interesting, or odd, that the warning is only in the 002 manual. I'm going to do the test shortly.

:) I hope I don't go from a functioning generator to parts in a short idle test, but if I do, you'll be at the top of the list. :beer:

I have been known to be a bit of an iconoclast, Jerry. :-P I'll see if I can run the test soon.

That's a good point, glcaines. It could be that there are other reasons not to idle the engine. For one, it's an air cooled engine, and gets little cooling at idle. I was thinking only of the warning I've read on this board several times that said that the output transistor of the regulator...

I got to thinking about this no-idle rule for the MEP-002A and MEP-003A. The regulator controls the exciter's field by applying current to the control windings of CVT1. When current is applied, CVT1 reduces its output to the rectifier bridge A4, and current to the exciter windings is in turn...

Maybe so no one puts gasoline in it.

Doh! I keep forgetting about the classified section here... before going to eBay/Craig's List. I'm glad you said that, Rick.

I wrote this in a previous thread. It is not a recommendation, just my experience: I bought the MEP-003A this summer, and the only thing I've had to do to it so far is clean and lubricate the starter motor. Now that I have reliable backup power, I would not hesitate to buy another MEP through...

This thread is about MEP-002A synchronization. If you would like to know about what to expect when buying a surplus generator, you should go to the auxiliary equipment section here: http://www.steelsoldiers.com/forumdisplay.php?55-Auxiliary-Equipment and use the orange button near the top of...