Low voltage out of Genset

[John Suter]

Alan, we (the group) are assuming the low voltage you
report is equally low for both legs. If not, advise
the as we might have to modify the advice.

John Suter


--- one_dusty_hoot wrote:

> Alan, the genset puts out 2 cycles per revolution,it
> should run at 1800 rpm, govenor controlled. This
> would
> output 1800 X 2=60 cycles per second. As load is
> increased, the speed decreases, then more fuel is
> given by the govenor to maintain speed.
>
> Look at the governor next on the motor, there is an
> arm that goes against a stop when the generator is
> started. There at the stop point is the speed
> adjustment.
>
> Before you start adjusting the stop you need to know
> what speed your motor is turning. You can buy a
> vibration tachometer at small motor repair shops.
> You can move the wand in and out by turning the
> knob. When the harmonic frequency is reached, the
> extended arm will begin vibrating rapidly. Mayve
> $20?
>
> Do not attempt to adjust speed without something as
> a reference.
>
> Your problem may be that the motor is running sour,
> could be the air filter is clogged, and possibly not
> enough diesel by a dirty filter?
>
> Bob Janes 87FC35 Greenville, SC
>
>
>
>
> --- In WanderlodgeForum@yahoogroups.com, Curt
> Sprenger
> wrote:
> >
> > 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
> > >
> > >
> >
>
>
>
>
>


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