Definitions; Sizing; Output Derating - ABB ACS180 Hardware Manual

94 Technical data
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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 Nominal supply voltage. For input voltage range U1, refer to
n
power network specification (page
I Nominal input current with typical motor power Pn. Continuous rms
1
input current, for dimensioning cables and fuses.
I Maximum output current. Available for two seconds at start.
max
I Nominal output current. Maximum continuous rms output current
n
allowed (no overload).
P Typical motor power in nominal use (no overloading). The kilowatt
n
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 Maximum output current with 110% overload, allowed for one minute
Ld
every ten minutes.
P Typical motor power in light-duty use (110% overload).
Ld
I Maximum output current with 150% overload, allowed for one minute
Hd
every ten minutes.
P Typical motor power in heavy-duty use (150% overload)
Hd
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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
this, the drive cannot accurately measure the motor current.

Output derating

The load capacity ( I
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.
) . If the motor has a lower nominal current rating than
N
, I , I ) decreases in some situations. In such situations,
N Ld Hd
115).
Electrical