Liebert POWER PROTECTION STATIC TRANSFER SWITCH - Manual (Page 15)

Location Considerations
7
3.4 Altitude
The standard units are designed for full load operation up to 4000 feet (1200 m) above sea level. See
Figure 1 for recommended deratings for altitudes greater than 4000 feet (1200 m).
Figure 1 Recommended derating for high altitude operation
Operation at full load at a higher altitude can be accommodated in ambient temperatures less than
104°F (40°C) ambient. Figure 2 shows the maximum allowable ambient temperature for full load
operation at altitudes above 4000 feet (1200 m).
Figure 2 Maximum ambient temperature for full load operation at higher altitudes
Table 2 Altitude conversion—feet to meters
Feet Meters Feet Meters
Altitude
4000 1200
Altitude
7500 2286
4500 1372 8000 2438
5000 1524 8500 2591
5500 1676 9000 2743
6000 1829 9500 2896
6500 1981 10000 3048
7000 2134
86
88
90
92
94
96
98
100
0
4000 4500 5000 5500 6000 6500 7000 7500 8000 8500 9000 9500
10000
Altitude (Feet Above Sea Level)
Rating (%)
Max. Amb
ient T
emperatu
re
104.0 (40)
102.2 (39)
100.4 (38)
98.6 (37)
96.8 (36)
95.0 (35)
93.2 (34)
94.1 (33)
89.6 (32)
87.8 (31)
86.0 (30)
0
40
00
45
00
50
00
55
00
60
00
65
00
70
00
75
00
80
00
85
00
90
00
95
00
100
00
Altitude—Feet
°F (°C)