Altitude Derating - ABB ACS380 Hardware Manual

92 Technical data
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Altitude derating

230 V units: 1000...2000 m above sea level, the derating is 1% for every 100 m
(330 ft).
400 V units: 1000...4000 m above sea level, the derating is 1% for every 100 m
(330 ft) Up to 4000 m altitude is possible for 400 V units when following boundary
conditions are taken into account:
• Maximum switching voltage for integrated Relay Output 1 is 30 V at 4000 m
altitude (e.g. it is not allowed to connect 250 V to Relay Output 1).
• When using BREL-01 side option module maximum potential difference between
adjacent relays is 30 V (e.g. it is not allowed to connect 250 V to Relay Output 2
and 30 V to Relay Output 3).
• If the conditions are not met, the maximum altitude is 2000 m.
• When using 3-phase 400 V ACS380 drive at 4000 m altitude, you can connect the
drive only to the following power systems: TN-S, TN-c, TN-CS, TT (not corner
earthed).
To calculate the output current, multiply the current in the rating table with the
derating factor k, which for x meters (1000 m <= x <= 4000 m) is:
1
k = 1 -
10 000 m
Check the network compatibility restrictions above 1000 m (3281 ft). Check also
PELV limitation on relay output terminals above 1000 m (3281 ft).
. (x - 1000) m