376 Technical data
Derating
I
2N
:
The load capacity decreases if the installation site ambient temperature exceeds
40 °C (104 °F), the altitude exceeds 1000 meters (3300 ft) or the switching frequency
is changed from 4 kHz to 8, 12 or 16 kHz.
Temperature derating,
I
2N
In the temperature range +40 °C…+50 °C (+104 °F…+122 °F), the rated output
current (
I
2N
) is decreased by 1% for every additional 1 °C (1.8 °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
· 10 °C = 90% or 0.90. The output current is then 0.90 ·
I
2N
.
Altitude derating,
I
2N
In altitudes 1000…2000 m (3300…6600 ft) above sea level, the derating is 1% for
every 100 m (330 ft).
For 3-phase 200 V drives, the maximum altitude is 3000 m (9800 ft) above sea level.
In altitudes 2000…3000 m (6600…9800 ft), the derating is 2% for every 100 m
(330 ft).
Switching frequency derating,
I
2N
The drive derates itself automatically when parameter
=
1 (
When parameter
= 2 (
), the drive controls the
switching frequency towards the selected switching frequency
if the drive’s internal temperature allows.
Switching
frequency
Drive voltage rating
U
N
= 200…240 V
U
N
= 380…480 V
4 kHz
No derating
No derating
8 kHz
I
2N
derated to 90%.
I
2N
derated to 75% for R0 or to 80% for R1…R4.
12 kHz
I
2N
derated to 80%.
I
2N
derated to 50% for R0 or to 65% for R1…R4
and maximum ambient temperature derated to
30 °C (86 °F).
16 kHz
I
2N
derated to 75%.
I
2N
derated to 50% and maximum ambient
temperature derated to 30 °C (86 °F).
%
°C
Summary of Contents for ACS355 series
Page 1: ...ABB machinery drives User s manual ACS355 drives ...
Page 4: ......
Page 16: ...16 ...
Page 32: ...32 Operation principle and hardware description ...
Page 58: ...58 Electrical installation ...
Page 74: ...74 Start up control with I O and ID run ...
Page 106: ...106 Control panels ...
Page 120: ...120 Application macros ...
Page 178: ...178 Program features ...
Page 338: ...338 Fieldbus control with embedded fieldbus ...
Page 368: ...368 Fault tracing ...
Page 404: ...404 Dimension drawings ...
Page 410: ...410 Appendix Resistor braking ...
Page 434: ...434 Appendix Permanent magnet synchronous motors PMSMs ...
