25kw generator

Something else to think about as you can always install demand circuits using contactors, about $35eh, or line voltage timers, about $65eh, to cycle peak demands thus use a smaller genset too control the same 85amp load requirement.

Digital lawn sprinkler timers, about $25eh, make a excellant pilot low voltage, low cost, timer used with a contactor for high current switching. This configuration would be a low voltage pilot circuit.

T_Bone

Aero

The person selling it has no other information. What I'd have to do is step it up to 220 or 240vac depending on what piece of equipment I run with it. Its temporary solution to a long running problem.

This probably means it's still acting as a 3-phase generator but only one phase is being used.

With the generator running flat out in a 3-phase environment, it would produce a line current of 69 amps per phase.

(3 phase power = line current * line voltage * 1.73)

So 25kw / (208 volts * 1.73) = 69 amps

So the windings in the generator would be sized for 69 amps -- in the worst case this limits you to 14KW or so.

Now, since the engine is designed for 25KW the generator might be able to do more than just 14KW into one phase.

If you can split some of your 240 volts loads to run off a different phase pair, you can probably use more of the capacity of this generator.

As the other posters mentioned, most motors and heaters are rated to operate at 208 volts as well as 230/240 volts.

I know this is not ideal to have one leg/phase unloaded, but it's run like this for the past 14 years without a problem.

With a 25kw unit you should be fine doing the same. I think all 220 volt equipment is also rated at 208 volts, at least our well pump is. And the single phase is 117 or so anyway.

Wayne