Installation above 1000 m amsl

The devices can be used at altitudes above 1000 m above sea level up to 3800 m above sea level under the following marginal conditions. The maximum altitude is restricted by the reduced dielectric strength due to the thinner air.

• The nominal motor current I_N is reduced due to the reduced cooling above 1000 m (see product manual, chapter Technical data).
• Above 2000 m above sea level, the air and creepage distances are only sufficient for overvoltage category II. If the installation requires overvoltage category III, you must install additional overvoltage protection on the line side.
• The devices are not intended for operation on current supply units or power supply units. The supplying power supply units must meet the isolation requirements according to IEC 60364-4-41 SELV/PELV. The supplying PELV system must not exceed the limit values for extra-low voltage according to EN 61800-5-1.