400
Technical data
ACH550-01 User's Manual
200 V drives
For 200 V drives, in the temperature range +40 °C…50 °C
(+104 °F…122 °F), the rated output current is decreased by 1%
for every 1 °C (1.8 °F) above +40 °C (+104 °F). The output
current is calculated by multiplying the current given in the rating
table by the derating factor.
Example:
If the ambient temperature is 50 °C (+122 °F), the
derating factor is 100% - 1%/°C = 90% or 0.90.
The output current is then 0.90 ·
I
2N
.
Altitude derating
In altitudes from 1000…2000 m (3300…6600 ft) above sea
level, the derating is 1% for every 100 m (330 ft). If the
installation site is higher than 2000 m (6600 ft) above sea level,
please contact your local ABB representative for further
information.
Single phase supply derating
For 208…240 V series drives, a single phase supply can be
used. In that case, the derating is 50%.
Switching frequency derating
The switching frequency control (see parameter 2607 on page
240
) can decrease the switching frequency instead of the
current when the drive reaches the internal temperature limit.
This function is on by default.
For worst case sizing, the maximum derating values are as
follows:
If the 8 kHz switching frequency is used, limit
P
N
and
I
2N
to 80%.
If the 12 kHz switching frequency is used, limit
P
N
and
I
2N
to
65%.
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