ABB ACS55 Guide De L'utilisateur page 304

36 Technical data
Definitions
I continuous rms input current (for dimensioning cables and fuses) at ambient
1N
temperature of +40 °C
I continuous output current at max ambient temperature of +50 °C.
LD
10% overloadability for one minute every ten minutes.
I maximum continuous output current at ambient temperature of +40 °C.
2N
No overloadability, derating 1% for every additional 1 °C up to 50 °C.
I maximum instantaneous output current. Available for two seconds every ten
2max
minutes at start-up, or as long as allowed by the drive temperature.
P typical motor power. The kilowatt ratings apply to most IEC 4-pole motors. The
N
horsepower ratings apply to most NEMA 4-pole motors.
R0...R4 ACS310 is manufactured in frame sizes R0...R4. Some instructions and other
information that only concern certain frame sizes are marked with the symbol of the
frame size (R0...R4)
Sizing
Drive sizing is based on the rated motor current and power. 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. Also the rated power of the drive must be higher
than or equal to compared to the rated motor power. The power ratings are the same
regardless of the supply voltage within one voltage range.
Note 1: The maximum allowed motor shaft power is limited to 1.5 · P
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) for I
(122 °F) for I .
LD
In multimotor systems, the output current of the drive must be equal to or greater than
the calculated sum of the input currents of all motors.
Derating
For information on derating, see chapter Technical data, section Derating in ACS310
user's manual (3AUA0000044201 [English]).
. If the limit is
N
and 50 °C
2N