If the installation altitude exceeds 1,000 m, the rated operating current must be reduced for thermal reasons.
If the installation altitude exceeds 2,000 m, the rated voltage must also be reduced because of the limited insulation strength. For installation altitudes between 2,000 m and 5,000 m above sea level, only rated voltages ≤460 V are allowed.
The following illustration shows the reduction in the rated device current in relation to the installation altitude: The rated operating current Ie must be reduced when installed at 1,000 m above sea level or higher.
Ambient temperature
The 3RW44 soft starters are designed to be operated with a nominal current at an ambient temperature of 40 ° Celsius. If this temperature is exceeded, e.g. due to excessive heating up in the switchgear cabinet, other loads or due to a higher general ambient temperature, this will influence the performance of the soft starter and must be taken into account in the dimensioning process
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