Eaton PowerXL DM1 Series - Temperature Deratings

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Appendix B—Installation guidelines
POWERXL SERIES VFDS MN040060EN—September 2020 www.eaton.com
Temperature deratings
When using the PowerXL drives at elevated temperatures,
derating is required to size the drive and maintain proper
cooling. The following procedures and tables describe the
process of derating and choosing the correct drive.
Procedure
Certain operating parameters and conditions are required
for correct derating. These are: voltage, torque application
(variable or constant), operating temperature, enclosure
rating, switching frequency, required amperage.
Follow the below steps to correctly de-rate the PowerXL
drives.
1. Find the derating table (Table 30–Table 31) for the
voltage and torque application (ex. 480 V, variable torque
= 3HP).
2. Within the table, find the sections of rows for the
application temperature and column for the switching
frequency (ex. 50°C section, 4 kHz column).
3. Look at all the frame sizes and find the frame size for
your required amperage.
4. Take the derating % for that frame size and go to the
catalog tables (Table 2–Table 8). De-rate each option
within that frame size to find the correct drive (ex.) the
derating percentage is 73.7%).