Vertiv Liebert STS2 - 6.6 Key Lockout Switch

Vertiv™ | Liebert® STS2/PDU
™
User Manual | Rev. 6 | 10/2017 6
2.4 Altitude
The standard units are designed for full load operation up to 4000 feet (1200m) above sea level. See Figure 1 for
recommended deratings for altitudes greater than 4000 feet (1200m).
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 (1200m).
Figure 2 Maximum ambient temperature for full load operation at higher altitudes
0
10,000
(3048)
9500
(2896)
9000
(2743)
8500
(2591)
8000
(2438)
7500
(2286)
6000
(1829)
5500
(1676)
7000
(2134)
6500
(1981)
5000
(1524)
4500
(1372)
4000
(1200)
100
86
88
90
92
94
96
98
Rating (%)
Altitude, Feet (M) Above Sea Level
0
10,000
(3048)
9500
(2896)
9000
(2743)
8500
(2591)
8000
(2438)
7500
(2286)
6000
(1829)
5500
(1676)
7000
(2134)
6500
(1981)
5000
(1524)
4500
(1372)
4000
(1200)
104.0 (40)
86.0 (30)
87.8 (31)
94.1 (33)
93.2 (34)
95.0 (35)
96.8 (36)
98.6 (37)
Maximum Ambient
Temperature, °F (°C)
Altitude, Feet (M) Above Sea Level
102.2 (39)
100.4 (38)
89.6 (32)