5 Mounting the Unit
5.1 Environmental Requirements
5.1.1 General Environmental Requirements
In environments with airborne liquids, particles, or corrosive gases, ensure that the protection rating of the equipment matches the
installation environment. Failure to meet requirements for ambient conditions can reduce the lifetime of the AC drive. Ensure that
requirements for humidity, temperature, and altitude are met.
Vibration and shock
The AC drive complies with requirements for units intended for installation in enclosures.
For detailed ambient conditions specifications, see
Installation requirements:
•
Make sure that there is sufficiently free space around the AC drive for cooling, see
•
Some free space is also necessary for maintenance.
•
Make sure that the mounting surface is sufficiently flat.
5.1.2 Ambient Temperature and Derating
The power rating of the unit is valid for an ambient temperature of 40 ºC (104 °F). If the device is to be used in higher ambient
temperatures, its power rating must be subjected to derating.
Use the following formula to calculate the reduced power:
�
de
= �
�
∗ 100 % − � − 40 °� ∗ � /100
Legend:
•
P
n
= nominal power of the unit
•
t = ambient temperature
•
x = derating coefficient, see the following list:
-
in ambient temperature of 40–50 °C (104–122 °F), use derating factor 1.5%/1 °C (°F)
-
For 50–55 °C (122–131 °F) ambient temperatures use derating factor 2.5% / 1 °C (°F).
Mounting the Unit
Operating Guide | VACON® NXI Inverters FI9-FI14
AQ304441431479en-000101 / DPD00909| 27
Danfoss A/S © 2019.11
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