ABB ACS355 series User Manual

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 2607 SWITCH FREQ CTRL =
1(ON).
When parameter 2607 SWITCH FREQ CTRL = 2 (ON (LOAD)), the drive controls the
switching frequency towards the selected switching frequency 2606 SWITCHING
FREQ 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
8kHz 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

ABB ACS355 series Specifications

General

Brand	ABB
Model	ACS355 series
Category	Controller
Language	English