Specifications

December 2008 Page 1–11
Chapter 1. Product Description
1
Altitude Correction Factor
(in meters)
1500 1.00
1800 0.97
2100 0.94
2400 0.91
2700 0.87
3000 0.83
3600 0.79
4200 0.74
4800 0.69
5400 0.64
6000 0.59
Table 1–6.
Altitude Dielectric Strength
De-Rating for Air Insulation
Temperatures
Altitude (in degrees C)
(in meters)
Short-time Long-Time Difference
Usual 1500 60 45 —
Unusual 2000 58 43 2
Unusual 3000 53 41 7
Unusual 4000 48 33 12
Table 1–7.
Altitude Correction for Maximum Temperature of Cooling Air