ABB ACS180 - Definitions; Sizing; Output Derating

￭
Definitions
The heavy duty ratings are valid at a surrounding air temperature of 50 °C (122 °F)
and the light duty ratings are valid at a surrounding air temperature of 40 °C
(104 °F) with the default drive switching frequency of 4 kHz (parameter 97.01 ), and
with an installation altitude below 1000 m (3281 ft).
U
n
Nominal supply voltage. For input voltage range U1, refer to Electrical
power network specification (page 115).
I
1
Nominal input current with typical motor power Pn. Continuous rms
input current, for dimensioning cables and fuses.
I
max
Maximum output current. Available for two seconds at start.
I
n
Nominal output current. Maximum continuous rms output current
allowed (no overload).
P
n
Typical motor power in nominal use (no overloading). The kilowatt
ratings are applicable to most IEC 4-pole (400 V, 50 Hz) motors. The
horsepower ratings are applicable to most NEMA 4-pole ( 460V 60Hz)
motors
I
Ld
Maximum output current with 110% overload, allowed for one minute
every ten minutes.
P
Ld
Typical motor power in light-duty use (110% overload).
I
Hd
Maximum output current with 150% overload, allowed for one minute
every ten minutes.
P
Hd
Typical motor power in heavy-duty use (150% overload)
￭
Sizing
ABB recommends the DriveSize tool for selecting the drive, motor and gear
combination (https://new.abb.com/drives/software-tools/drivesize). You can
also use the ratings tables.
The minimum recommended nominal current of the motor is 40% of the drive
nominal output current ( I
N
) . If the motor has a lower nominal current rating than
this, the drive cannot accurately measure the motor current.
Output derating
The load capacity ( I
N
, I
Ld
, I
Hd
) decreases in some situations. In such situations,
where full motor power is required, oversize the drive so that the total derated
output current is sufficient for the motor to reach the full power.
In an environment where more than one type of derating is necessary (for example,
high altitude and high temperature), the effects of derating are cumulative.
94 Technical data