Symbols; Sizing; Derating; Temperature Derating - ABB ACS150 User Manual

114

Symbols

Input
I
1N
Output
I
2N
I
2,1min/10min
I
2max
P
N

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
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
90% or 0.90. The output current is then 0.90 · I

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:
Switching
frequency
4 kHz
8 kHz
12 kHz
16 kHz
Ensure that parameter
switching frequency if the drive's internal temperature is too high. See parameter
2607
Technical data
continuous rms input current
continuous rms current. 50% overload is allowed for one minute every ten minutes.
maximum (50% overload) current allowed for one minute every ten minutes
maximum output current. Available for two seconds at start, otherwise as long as
allowed by the drive temperature.
typical motor power. The kilowatt ratings apply to most IEC 4-pole motors. The
horsepower ratings apply to most NEMA 4-pole motors.
U
N
No derating
Derate I to 90%.
2N
Derate I to 80%.
2N
Derate I to 75%.
2N
2607
for details.
.
2N
Drive voltage rating
= 200...240 V
SWITCH FREQ CTRL = 1 (ON), which reduces the
. If the limit is exceeded, motor
N
U = 380...480 V
N
No derating
Derate I to 75% for R0 or to 80% for
2N
R1 and R2.
Derate I to 50% for R0, or to 65% for
2N
R1 and R2, and derate maximum
ambient temperature to 30°C (86°F).
Derate I to 50% and derate maximum
2N
ambient temperature to 30°C (86°F).
%
· 10°C =
°C