Low voltage out of Genset

[Curt Sprenger]

I'm not an expert but found this on the Internet. For an oscillating or
varying current, frequency is the number of complete cycles per second
in alternating current direction. The standard unit of frequency is the
hertz, abbreviated Hz. If a current completes one cycle per second, then
the frequency is 1 Hz; 60 cycles per second equals 60 Hz (the standard
alternating-current utility frequency in the United States).

I recall the Onan guy adjusting rpms on our previous gen. set to get the
frequency to 60 and to increase voltage.

Sounds to me you are on the right track. If you can, turn up the rpms
and watch for voltage increase. Good luck. Please keep us posted.

Curt Sprenger 1987 PT38, Anaheim Hills, Calif.



Alan wrote:

> My 87FC35 has a 8.0 kW genset. I am getting low voltage out of it
> (around 95 volts). On my last onan genset (77 GMC - carbed gas),
> this was a common problem and was simply corrected by increasing
> RPMs. (If this is the fix, how do I adjust idle speed? This fuel
> injection isn't as intuitive for me as I've been a carburetor guy.)
>
> I found an installation manual for the genset and it says to adjust
> some "taps" on a transformer regulator. It also says "output
> frequency is determined by engine speed and normally does not
> require adjustment." I'm not exactly sure what it means by "output
> frequency". Is that voltage??
>
> Is this problem more complicated than adjusting the RPMs? Maybe I
> don't have one of the Onan manuals..?? I have a parts manual and an
> installation manual.
>
> I have searched the forums and did not find a post that seemed to
> address my situation. Let me know if I missed it.
>
> Thanks in advance,
> Alan Johnson
> 87FC35
>
>