Test voltage on small gensets

[barry100]

Hi all
Anybody know the working voltage on small brushless 240 vac 5 Kva gensets I know they start about 250 vac but what can drop down and give  usefull power  say under a load test
Barry

[Combustor]

Hello Barry100,
                    Any brushless sets I have seen use a solid state electronic voltage regulator, which should be capable of  regulating output voltage to within about
       1% from no load to full continuous rated output. Voltage may dip during momentary overloads such as motor starting etc. but should otherwise remain
        constant at its preset level.  This is often adjustable on the regulator board within certain limits.   Regards,  Combustor.

[trigzy]

There  are also some brushless units that use a capacitor/harmonic winding for voltage regulation.  The regulation on these is not as good.   In any case, assuming you are in North America, based on what the utilities generally allow:

Lowest 113/226V
Nominal 120/240V
Highest 127/254V

Steve

[barry100]

Hi All
This is a capaciter type regulator (no eletronic regulator),I'm in Australia mains voltage is 240vac single phase,  Trigzy are you saying the voltage range may be 226 lowest  to 254 volts highest.
Barry

[trigzy]

Hi Barry,
            Those are what the North American utilities consider "acceptable" on our grid system.  Hopefully, if you were at the high end of the range, that would be with little or no load, and if you were closer to the bottom, hoepfully that would be a fully loaded condition.  The closer to 240V, (if that is the spec. voltage in your area) the better.  The closer your no load - full load numbers are, the better regulation the genset has.  If it's way off, look for a new capacitor for your generator.  There are also diodes, and perhaps a zener diode on the rotor, these may need to be replaced.

Steve