ABB ACS350 Series, User Manual

Page: 291 / 314

Technical data
291
Symbols
Sizing
The current ratings are the same regardless of the supply voltage within one voltage range. To achieve
the rated motor power given in the table, the rated current of the drive must be higher than or equal to
the rated motor current.
Note 1: The maximum allowed motor shaft power is limited to 1.5 · P
N
. If the limit is exceeded, motor
torque and current are automatically restricted. The function protects the input bridge of the drive
against overload.
Note 2: The ratings apply at ambient temperature of 40°C (104°F).
Derating
The load capacity decreases if the installation site ambient temperature exceeds 40°C (104°F) or if the
altitude exceeds 1000 meters (3300 ft).
Temperature derating
In the temperature range +40°C…+50°C (+104°F…+122°F), the rated output current 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
In altitudes 1000…2000 m (3300…6600 ft) above sea level, the derating is 1% for every 100 m (330 ft).
Switching frequency derating
Derate according to the switching frequency used (see parameter 2606 ) as follows:
Ensure that parameter 2607 SWITCH FREQ CTRL = 1 (ON), which reduces the switching frequency if
the drive’s internal temperature is too high. See parameter 2607 for details.
Input
I
1N
continuous rms input current (for dimensioning cables and fuses)
Output
I
2N
continuous rms current. 50% overload is allowed for one minute every ten minutes.
I
2,1min/10min
maximum (50% overload) current allowed for one minute every ten minutes
I
2max
maximum output current. Available for two seconds at start, otherwise as long as
allowed by the drive temperature.
P
N
typical motor power. The kilowatt ratings apply to most IEC 4-pole motors. The
horsepower ratings apply to most NEMA 4-pole motors.
Switching
frequency Drive voltage rating
U
N
= 200…240 V U
N
= 380…480 V
4 kHz No derating No derating
8 kHz Derate I
2N
to 90%. Derate I
2N
to 75% for R0 or to 80% for
R1…R4.
12 kHz Derate I
2N
to 80%. Derate I
2N
to 50% for R0 or to 65% for
R1…R4 and derate maximum ambient
temperature to 30°C (86°F).
16 kHz Derate I
2N
to 75%. Derate I
2N
to 50% and derate maximum
ambient temperature to 30°C (86°F).
%
°C