Chapter 9 Specification MS300 (IP66 / NEMA 4X)
9-8
For IP66 / NEMA 4X / UL Type 4X
Current derating at ambient temperature
Ambient temperature 40
o
C 45
o
C 50
o
C
Operating
altitude
above sea level
(m)
0
–1000 100 %
1001–1500 100 % 95 %
1501-–2000 100 % 95 % 90 %
Operating
Conditions
Ambient Temperature Limits
IP66 / NEMA 4X /
UL Type 4X
When the AC motor drive is operating at the rated current, the ambient
temperature must be between -20
–40 °C. When the temperature is over
40 °C, for every increase by 1 °C, decrease the rated current 2.5 %. The
maximum allowable temperature is 50 °C.
High Altitude
If the AC motor drive is installed at an altitude of 0–1000 m, follow normal
operation restrictions. If it is installed at an altitude of 1000–2000 m,
decrease the rated current by 1 % or lower the temperature 0.5 °C for every
100 m increase in altitude. The maximum altitude for corner grounded is
2000 m. Contact Delta for more information if you need to use this motor
drive at an altitude of 2000 m or higher.