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12. APPENDIX
The standard condition of rated power output:
Altitude: 0m
Ambient temperature: 25°C (77°F)
Relative humidity: 30%
Altitude (m)
0
500
1000
2000
3000
4000
NOTE:
Relative humidity 60% correction factor C-0.01
Relative humidity 80% correction factor C -0.02
Relative humidity 90% correction factor C-0.03
Relative humidity 100% correction factor C-0.04
Example:
Rated power ( PN ) 2.8kVA generator (Altitude: 1000m) Ambient temperature: 35°C,
Relative humidity: 80%
P=Pn*(C-0.02)=2.8*(0.82-0.02)=2.24kVA
Factor of Environment Correction:
Ambient Temperature°C (°F)
25 (77)
30 (86)
1
0.98
0.93
0.91
0.87
0.85
0.75
0.73
0.64
0.62
0.54
0.52
35 (95)
40 (104)
0.96
0.93
0.89
0.87
0.82
0.80
0.71
0.69
0.60
0.58
0.50
0.48
35
45 (113)
0.90
0.84
0.78
0.66
0.56
0.46
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