Siemens SINAMICS G180 - Voltage Derating; C.12.2 Voltage Derating

Technical data
C.12 Derating
Installation and Operating Instructions SINAMICS G180
Operating Instructions, 02/2019, 4BS0751-007
209
C.12.2
Voltage derating
The compact units are dimensioned according to minimum air clearances up to 2000 m
above sea level and the cabinet units up to 3000 m. Voltage derating is not required unless
the installation altitude is higher than 2000 m or 3000 m above sea level (this is only
applicable for the basic device
1)
).
Since the air clearances in the inverter cannot be changed, this factor must be taken into
account in the voltage derating calculation.
Table C- 10 Voltage derating for compact units
Installation altitude above sea level
in m
Voltage derating factor in % of rated voltage
0 … 2000
100 %
2001 … 2500
93,4 %
2501 … 3000
87,7 %
3001 … 3500
81,9 %
3501 … 4000
77,5 %
4001 … 4500
71,9 %
4501 … 5000
67,6 %
Table C- 11 Voltage derating for cabinet units (is only applicable for the basic device
1)
)
Installation altitude above sea level
in m
Voltage derating factor in % of rated voltage
0 … 3000
100 %
3001 … 3500
93,9 %
3501 … 4000
88,5 %
4001 … 4500
82,4 %
4501 … 5000
77,0 %
1)
When installing options, it is possible that the permissible installation altitude is further
restricted, or a voltage derating results in a lower value. This must be checked on a case-by-
case basis.