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Derating factor %
Notes
1) See derating diagram or consult the factory for other conditions.
2) At reference conditions unless otherwise stated.
3) Rating definition (ISO 8528-1):
LTP: Limited Time Power is the maximum electrical power which a generating set is capable of delivering (at variable load), in the event of a
utility power failure (for up to 500 hours per year of which a maximum of 300 hours is continuous running). No overload is permitted on these
ratings. The alternator is peak continuous rated (as defined in ISO 8528-3) at 25°C.
PRP: Prime Power is the maximum power available during a variable power sequence, which may be run for an unlimited number of hours per
year, between stated maintenance intervals and under the stated ambient conditions. A 5% overload is permitted for 1 hour in 12 hours. The
permissible average power output during a 24h period shall not exceed the stated load factor of 80%.
4) Specific mass fuel used: 0.86 kg/l.
Height
(m)
Temperature
(°C)
0 5 10 15 20 25 30 35 40 45 50
0 100 100 100 100 100 100 97 95 92 89 86
500 100 100 98 97 95 94 91 89 86 83 81
1000 95 93 92 90 89 88 85 83 80 78 75
1500 88 87 85 84 83 81 79 77 75 72 70
2000 81 80 79 78 76 75 73 71 69 67 65
2500 74 73 72 71 70 69 67 65 63 61 59
3000 68 67 66 65 64 63 61 59 57 56 54
3500 61 60 59 58 57 56 55 53 52 50 49
4000 54 53 53 52 51 50 49 47 46 45 43
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