ABB MT series Installation, Operation & Maintenance Manual

Also see for M2A series: Installation and maintenance instruction Instructions Installation, operation & maintenance instructions Machine Instructions Manual

ABB MT series Installation, Operation & Maintenance Manual Manual pdf 13 page image

5.7.3 Dimensioning with ABB ACS550convertersThe loadability curves presented in Figures 5a - 5d arevalid for ABB ACS550 series converters. The figures showthe approximate maximum continuous output torque ofthe motors as a function of supply frequency. The outputtorque is given as a percentage of the nominal torque ofthe motor. The values are indicative and exact values areavailable on request.NOTE!The maximum speed of the motor must not beexceeded!5.7.4 Dimensioning with other voltagesource PWM-type convertersFor other converters, which have uncontrolled DCvoltage and minimum switching frequency of 3 kHz,the dimensioning instructions of ACS550 can be usedas guidelines, but it shall be noted, that the actualthermal loadability can also be lower. Please contact themanufacturer of the converter or the system supplier.NOTE!The actual thermal loadability of a motor may belower than shown by guideline curves.5.7.5 Short time overloadsABB motors can usually be temporarily overloaded as wellas used in intermittent duties. The most convenient methodto dimension such applications is to use the DriveSize tool.5.8 Rating platesThe usage of ABB’s motors in variable speed applicationsdo not usually require additional rating plates and theparameters required for commissioning the converter canbe found from the main rating plate. However, in somespecial applications the motors can be equipped withadditional rating plates for variable speed applications andthose include following information:- speed range- power range- voltage and current range- type of torque (constant or quadratic)- converter type and required minimum switchingfrequency5.9 Commissioning the variablespeed applicationThe commissioning of the variable speed application mustbe done according to the instructions of the frequencyconverter and local laws and regulations. The requirementsand limitations set by the application must also be takeninto account.All parameters needed for setting the converter must betaken from the motor rating plates. The most often neededparameters are:- Motor nominal voltage- Motor nominal current- Motor nominal frequency- Motor nominal speed- Motor nominal powerNote: In case of missing or inaccurate information, do notoperate the motor before ensuring correct settings!ABB recommends using all the suitable protective featuresprovided by the converter to improve the safety of theapplication. Converters usually provide features such as(names and availability of features depend on manufacturerand model of the converter):- Minimum speed- Maximum speed- Acceleration and deceleration times- Maximum current- Maximum Torque- Stall protectionLow voltage motor manual 01-2009 | ABB Motors and Generators EN-13