Derating Factors As A Function Of Coolant Temperature - Siemens SINAMICS S120 Equipment Manual

3.2.9.1

Derating factors as a function of coolant temperature

Water cooled SINAMICS S120 devices are suitable for water or a mixture of water and an
antifreeze as coolant, corresponding to Section Antifreeze + biocide (Page 262).
When water is used as a coolant, the units can supply 100% output current at temperatures
between 5 °C and 38 °C. The maximum output current decreases linearly to 90% at
temperatures between 38 °C and 43 °C.
When water and an antifreeze mixture described above is used as a coolant, the units can
supply 100% output current at temperatures between 0 °C and 38 °C. The maximum output
current decreases linearly to 90% at temperatures between 38 °C and 43 °C.
Figure 3-14
Water-cooled chassis power units for common cooling circuits
Manual, 08/2017, 6SL3097-4AM10-0BP0
Maximum output current as a function of coolant temperature
Line-side power components
3.2 Active Interface Modules
71