Mep002a 208 instead of 240v

[Geronimoejoe]

I'm going to try to post this once more, then give up. I tried earlier, but it never posted.
My output L2,L3 is running 208 instead of 240vac.
The switch under the lid is on the right position for 240 vac (single phase), but even the 120 vac is running 108 vac. I don't know gens, so I need to get pointed in the right direction. This is short because I don't think it's going to post. More information, I'll post back after this posts.
Thank you
Geronimoejoe

 

[JD4044M]

Sounds like you need to raise the RPMs a little which will bring the voltage and Cycles up at the same time. That is all I can offer. Hook your meter up while you do it and watch the voltage.

 

[NY Tom]

Isn't there a small knob on the control panel for the voltage adjustment?

The other larger knob sets the cycles (HZ) by adjusting the engine operating RPM.

 

[Scoobyshep]

Rpm is frequency. Really low frequency can cause some loss in voltage. Check voltage regulator knob.

Sent from my SM-G973U using Tapatalk

 

[Light in the Dark]

Yes make sure you are running at the proper RPM, and verify the hertz being produced. Once your hertz are correct, you should be able to turn the voltage knob on the face of the machine to increase the voltage. Verify with a handheld meter or a cheap kill a watt, don't go solely by the factory gauges.

 

[Light in the Dark]

And are your measurements unloaded, or under load?

 

[JD4044M]

Here is a site to explain the common generator.Generator Facts

Here is the Manual for your generator on line. Refer to 6.6 for voltage adjustment.
http://manuals.chudov.com/MEP-002A/MEP-002A-manual-2.pdf Military Manual

 

[Guyfang]

Are you taking your voltage readings from the gen set meter? Or a handheld Multimeter?

 

[Isaac-1]

Where are you located, I am also the Laura outage area, and have a MEP-002a that got clobbered by a tree as well as a MEP-003a. Dealing with lots of issues here at the moment, for ourselves and family with generator, roof, and other issues, but I might be able to help if you are nearby. I am in DeRidder

 

[Light in the Dark]

Good luck everyone

 

[Ray70]

Hold on, go back to the original post. Why are you using L2-L3 if you are set in 120/240 mode??
You should have 240V between L1 and L3 and 120 between L1-L0 and L3-L0
L2 is not is play unless you're in 208 mode.
Was that a misprint in your description or are you hooked up incorrectly?
Also, where is your AM/VM switch set and are you testing with the gage or a good multi meter? and what lugs are you testing?

 

[Light in the Dark]

Hold on, go back to the original post. Why are you using L2-L3 if you are set in 120/240 mode??
You should have 240V between L1 and L3 and 120 between L1-L0 and L3-L0
L2 is not is play unless you're in 208 mode.
Was that a misprint in your description or are you hooked up incorrectly?
Also, where is your AM/VM switch set and are you testing with the gage or a good multi meter? and what lugs are you testing?

Good catch