Regulating Onan's

[Tony B]

I have finally got the generators back from Stone's place last week and have spent the afternoon playing. Both are as advertised fully operational. :yay::yay::yay: I put my Generator tester on them, both are giving out 280 to 300 volts, I presume this RMS. Does anyone know how to regulate the vopltae? Is it on the engine govenor or internal. For fun tried a load of a 1 kw heavy grinder, neither even stuttered when the grinder was started.

[Stone]

Engine speed will affect voltage but also alter the frequency so I assume you'd want to be leaving that alone.

 

If your genny tester is measuring peak voltage it would be RMS voltage * sqrt(2); 220Vrms (Euro standard) would measure as 311V so not too far out...or your meter could be out of calibration

 

Did you measure with the load applied? The voltage isn't that well regulated (they were designed to run with a fixed, near-constant load always applied) so if practical you should be measuring while your 1kW grinder is running - that'll give you much more of an accurate idea.

 

I'm very glad they work!

 

Stone

[Tony B]

The tester I have is a Harrington box that came from somewhere, built in load test. Not that it seems to worry the Onan. At least I know they are working, great bits of kit, It will proably spend most of its time at Frinmere so will be put to hard use.