Technical data
12.5 Current and voltage derating dependent on the installation altitude
Converter with control units CU250D-2
330 Operating Instructions, 04/2014, FW V4.7, A5E34261542B AA
Current and voltage derating dependent on the installation altitude
Current derating depending on the installation altitude
m above sea level you must
reduce the inverter output current
corresponding to the adjacent curve as a result
of the lower cooling power of the air.
Permissible line supplies depending on the installation altitude
● Installation altitude up to 2000 m above sea level
– Connection to every supply system permitted for the inverter.
● Installation altitudes between 2000 m and 4000 m above sea level
– Connection to a TN system with grounded neutral point.
– TN systems with grounded line conductor are not permitted.
– The TN line system with grounded neutral point can also be supplied using an
isolation transformer.
– The phase-to-phase voltage does not have to be reduced.
Also observe restrictions related to the connection of components.
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