Wacker Neuson GP 4000, Руководство оператора

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Operation GP 4000
4.7 Generator Derating
All generators are subject to derating for altitude and temperature. Internal
combustion engines, unless modified, run less efficiently at higher altitudes due to
the reduction of air pressure. This translates into a lack of power and thus
reduction in generator output. Temperature affects both engine and generator
performance. As temperature increases, an engine will run less efficiently and
more resistance will be found in electrical components. Therefore, as the
temperature increases, the output of the generator decreases. Altitude also affects
the cooling capacity of air—the higher the altitude the less dense the air is and thus
the lower its ability to transfer heat.
For every increase in altitude of 500 m (1650 ft.) above 1000 m (3300 ft.), the
output of the generator will be reduced by 3%. For every increase of 5° C (9° F) in
ambient temperature above 40° C (104° F), the output of the generator will be
reduced by 3%. Use the tables shown for altitude and temperature deration factors.
It may be necessary to consider both altitude and ambient temperature deration
factors to determine true generator output.
Ambient Temperature
°C (°F)
Derate Factor
45 (113) 3 % 0.97
50 (122) 6 % 0.94
55 (131) 9 % 0.91
60 (140) 12 % 0.88
Altitude
m (ft)
Derate Factor
1500 (4900) 3 % 0.97
2000 (6600) 6 % 0.94
2500 (8200) 9 % 0.91
3000 (9900) 12 % 0.88
3500 (11500) 15 % 0.85
4000 (13100) 18 % 0.82