Derating Factors - Siemens SINAMICS S120 Equipment Manual

2.3.6.1

Derating factors

Derating factors as a function of site altitude and ambient temperature
Fig. 2-13
Note
A current correction factor of K
factor of K
Fig. 2-14
Chassis Power Units Liquid Cooled
SINAMICS S120 Equipment Manual, Edition 12/2007, 6SL3097-2AM00-0BP4
20 25 30
Current correction factor K
T
(see diagram below). The output current cannot be increased.
I
100
95
90
85
0
1000
Site altitude in m above sea level
Current correction factor K
35 40
Ambient temperature in °C
as a function of cooling air temperature
T
> 1 can be applied only to compensate a current correction
2000
as a function of site altitude
I
Line-Side Power Components
2.3 Active Interface Modules
1.3
1.2
1.1
1.0
0.9
0.8
45 50 55
1.00
0.95
0.90
0.85
3000 4000
2-23