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Appendix A – ACS/ACC 600 Technical Data
A-6
601/604/607 US Supplement
Output Current Derating
For High Altitude
When the altitude of the installation site exceeds 1000 m (3300 ft.)
above sea level, the rated output current for Normal Use is decreased
by 1% for every additional 100 m (300 ft.). If the installation site is
higher than 2000 m (6600 ft.) above sea level, please contact your
local ABB distributor or office for further information. For Heavy Duty
Use, apply the I
2HD
current given in the rating table up to 2000 m (6600
ft.). No derating is required.
The output current is calculated by multiplying the I
2N
current given in
the rating table by the derating factor determined from the derating
curve.
Output Current Derating Factors for High Altitude
(Percent of I
2N
)
88%
90%
92%
94%
96%
98%
100%
3300
1000
4900
1500
6600 Feet
2000
Meters
Altitude
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