Voltmaster XAF105, Owner'S Manual, Page: 28 / 46

22 Voltmaster Engine-Driven Generators
Operation: Operating the generator
Model XDR diesel generators
Diesel generators require a load of at least 25% of the generator’s
rated output. Operating a diesel generator with insufficient load
(referred to as “wet stacking”) will irreparably damage the engine
and void the warranty.
Model XTP three-phase generators
When checking the no-load voltage on an XTP three-phase
generator, the voltage will be about 10% below the rating listed on
the generator serial number tag. When a load is placed on the
generator, the reactor transformer inside the generator activates,
and the voltage immediately increases to the generator’s rated
voltage.
If relays, electric controls, etc., are used with a three-phase motor, an
automatic voltage regulator is required. If an automatic voltage
regulator is installed, the voltage regulation is ±1.5%.
XTP generators feature a three-phase circuit breaker that is rated for
the amperage load of the generator. If the circuit breaker trips
under load, you must remove some of the load to prevent over
loading the generator. All three-phase circuit breakers are designed
for motor load starting, permitting momentary overload conditions
associated with three-phase motors.
Receptacles
The ratings on the generator serial number tag can be met by using
the receptacles in combination or individually, as long as the
generator and receptacle ampere ratings are not exceeded.
Receptacles are protected by ground-fault circuit interrupters
(GFCI). Consult the National Electrical Code, Underwriters
Laboratories or Canadian Standards Association code for ground-
fault protection requirements for temporary installations.
CAUTION
Operating a diesel generator without the proper load will
permanently damage the engine.
Always operate the diesel engine under load, using at least 25% of
its rated capacity.