Delta MH300 Series - Page 244

Chapter 9 Specification
MH300
9-11
Altitude derating curve
Condition
Operating Environment
High Altitude
If the AC motor drive is installed at an altitude of 0–1000 m, follow normal operation restrictions.
For altitudes of 1000–2000 m, decrease the drive’s rated current by 1% or lower the temperature
by 0.5°C for every 100 m increase in altitude. The maximum altitude for corner grounding is 2000
m. If installing at an altitude higher than 2000 m is required, contact Delta for more information.
Table 9-12
Fig. 9-2
The rated output current derating (%) for different altitudes above sea level:
Altitude (m) 0 1000 1500 2000
Output Current /
Rated Current (%)
100 100 95 90
Table 9-13
For IP20 / UL Open Type
Current derating at ambient temperature
Ambient temperature 40
o
C 45
o
C 50
o
C
Operating altitude (m)
0-1000 100%
1001-1500 100% 95%
1501-2000 100% 95% 90%
Table 9-14
For IP40 / NEMA1 / UL Type 1
Current derating at ambient temperature
Ambient temperature
30
o
C
35
o
C
40
o
C
Operating altitude (m)
0-1000 100%
1001-1500 100% 95%
1501-2000 100% 95% 90%
Table 9-15