Dimensioning With Abb Acs550 Converters; Dimensioning With Other Voltage Source Pwm-Type Converters; Short Time Overloads; Rating Plates - ABB Low Voltage Motors Manuel D'installation, D'exploitation Et De Maintenance

5.7.3 Dimensioning with ABB ACS550
converters
The loadability curves presented in Figures 5a - 5d are
valid for ABB ACS550 series converters. The figures
show the approximate maximum continuous output
torque of the motors as a function of supply frequency.
The output torque is given as a percentage of the nominal
torque of the motor. The values are indicative and exact
values are available on request.
NOTE!
The maximum speed of the motor must not be
exceeded!
5.7.4 Dimensioning with other voltage
source PWM-type converters
For other converters, which have uncontrolled DC
voltage and minimum switching frequency of 3 kHz,
the dimensioning instructions of ACS550 can be used
as guidelines, but it shall be noted, that the actual
thermal loadability can also be lower. Please contact the
manufacturer of the converter or the system supplier.
NOTE!
The actual thermal loadability of a motor may be
lower than shown by guideline curves.

5.7.5 Short time overloads

ABB motors can usually be temporarily overloaded as
well as used in intermittent duties. The most convenient
method to dimension such applications is to use the
DriveSize tool.

5.8 Rating plates

The usage of ABB's motors in variable speed applications
do not usually require additional rating plates and the
parameters required for commissioning the converter can
be found from the main rating plate. However, in some
ABB/Manual for Low Voltage Motors 01-2009
special applications the motors can be equipped with
additional rating plates for variable speed applications
and those include following information:
- speed range
- power range
- voltage and current range
- type of torque (constant or quadratic)
- converter type and required minimum switching
frequency
5.9 Commissioning the variable
speed application
The commissioning of the variable speed application
must be done according to the instructions of the
frequency converter and local laws and regulations. The
requirements and limitations set by the application must
also be taken into account.
All parameters needed for setting the converter must
be taken from the motor rating plates. The most often
needed parameters are:
- Motor nominal voltage
- Motor nominal current
- Motor nominal frequency
- Motor nominal speed
- Motor nominal power
Note: In case of missing or inaccurate information, do not
operate the motor before ensuring correct settings!
ABB recommends using all the suitable protective
features provided by the converter to improve the safety
of the application. Converters usually provide features
such as (names and availability of features depend on
manufacturer and model of the converter):
- Minimum speed
- Maximum speed
- Acceleration and deceleration times
- Maximum current
- Maximum Torque
- Stall protection
EN-13