Operation Manual of WEICHAI GENSET
2 Parameters
Description of set power
Rated power (PRP): refers to the
maximum power that the generator set
can continuously use within 24 hours in
the specified maintenance period and
under the specified ambient conditions,
which is also called continuous power.
Standby power (LTP): refers to the
maximum power when the generator set
can overload 10% of the rated power for
1h every 12h within a certain period of
time in the specified maintenance
period and under the specified ambient
conditions.
Environmental adaptability of set
1. The set shall be able to work
normally at ratings under the following
environmental conditions and be able to
run for 1 h with 10% overloaded.
Ambient temperature: 5~25℃
Altitude: 100 kPa
Relative air humidity: 30%~60%
2. The set shall be able to run under
the following environmental conditions,
but the set power must be corrected.
Ambient temperature: 25~40℃
Altitude range: 1000~4000 m
Ambient humidity: 5%~90%
3. The set shall be able to work
normally with a heating (low-
temperature start) device under the
following environmental conditions.
Ambient temperature: -40~5℃
Altitude range: 1000~4000 m
Ambient humidity: 5%~90%
Correction of set power
If the ambient temperature is higher
than 25℃, the atmospheric pressure is
lower than 100kPa, and the relative
humidity is higher than 60%, the rated
power of the generator set shall be
corrected. If the loaded power of the
generator set is higher than the
corrected value of rated power when it
is running, black smoke and overheating
will be generated from and caused to the
diesel engine. If the generator set runs
under such conditions for a long time,
the diesel engine will have major faults
and damage. Please take the situation
seriously.
When the ambient temperature is too
high, the air density, the oxygen quantity
and the combustion efficiency decrease
correspondingly, and thus the
mechanical output power of the diesel
engine is reduced. When the alternator
works, it needs cold air to cool the
windings. If the ambient temperature is
too high, the cooling effect decreases
and the internal temperature of the
alternator windings increases. In order
to ensure that the winding temperature
of the alternator is within the allowable
range, the output power of the
alternator must be reduced.
The air density will decrease with the
increase in altitude, and the output
power of diesel engine and alternator
will also be affected.
Although the output power of generator
set will not be decreased when it is used
in low temperature and high humidity
conditions, the factors that may affect
the normal functioning of the set due to
the different site conditions must also be
considered during model selection.
When the set is used under non-
9
    "