￭ Definitions
The ratings are valid at a maximum surrounding air temperature of 50 °C (122 °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 input voltage of the drive. For input voltage range U1, see section
Electrical power network specification (page 143).
I
1
Nominal input current. Continuous rms input current (for dimensioning
cables and fuses).
I
max
Maximum output current. Available for two seconds every 10 minutes
when output frequency is below 9 Hz. Maximum current setting (parameter
30.17) can also limit the value.
I
N
Nominal output current. Maximum continuous rms output current (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 motors (460 V, 60 Hz).
I
Ld
Continuous rms output current. Allows 10% overload for 1 minute every
10 minutes.
P
Ld
Typical motor power in light-duty use (10% overload). 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 motors (460 V, 60 Hz).
￭ Sizing
ABB recommends the DriveSize tool for selecting the drive, motor and gear combination
(http://new.abb.com/drives/software-tools/drivesize). You can also use the ratings tables.
Output derating
The load capacity (I
N
, I
Ld
) 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.
Note:
•
I
max
is not derated.
• The motor can also have a derating on it.
• You can also use the DriveSize tool for derating.
See Surrounding air temperature derating (page 128), Altitude derating (page 128) and
Switching frequency derating (page 128) for the derating values.
Technical data 125
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