Derating factor
IEC type
ACS480-04-…
12 kHz8 kHz< 4 kHz
0.480.651.004A1-4
0.480.651.005A7-4
0.480.651.007A3-4
0.480.651.009A5-4
0.510.681.012A7-4
0.510.681.0018A-4
0.510.671.0026A-4
0.490.651.0033A-4
0.490.651.0039A-4
0.490.661.0046A-4
0.490.661.0050A-4
Derating factor
UL (NEC) type
ACS480-04-…
12 kHz8 kHz< 4 kHz
3-phase U
N
= 480 V
0.480.651.002A1-4
0.480.651.003A0-4
0.480.651.003A5-4
0.480.651.004A8-4
0.480.651.006A0-4
0.480.651.007A6-4
0.510.681.0011A-4
0.510.681.0014A-4
0.510.671.0021A-4
0.490.651.0027A-4
0.490.651.0034A-4
0.490.661.0042A-4
￭ Altitude derating
400/480 V units: In altitudes 1000…4000 m (3281…13123 ft) above sea level, the derating
is 1% for every 100 m (328 ft). In addition:
• A maximum altitude of 4000 m (13123 ft) is permitted for these earthing systems:
neutral-grounded TN and TT systems and non-corner grounded IT systems. A maximum
altitude of 2000 m (6562 ft) is permitted for these earthing systems: corner-grounded
TN, TT and IT systems.
• Above 2000 m (6562 ft), the maximum permitted voltage for the relay output RO1
decreases. At 4000 m (13123 ft), it is 30 V.
• Above 2000 m (6562 ft), the maximum permitted potential difference between the
adjacent relays of the BREL-01 relay extension module (option +L511) decreases. At
4000 m (13123 ft), it is 30 V.
Technical data 101
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