ACS550 Userís Manual 271Technical dataMotor connectionsWARNING! Never connect line power to the drive output terminals: U2, V2 or W2.Line voltage applied to the output can result in permanent damage to the drive. Iffrequent bypassing is required, use mechanically interlocked switches or contactors.WARNING! Do not connect any motor with a nominal voltage less than one half ofthe driveís nominal input voltage.WARNING! Disconnect the drive before conducting any voltage tolerance (Hi-Pot)test or insulation resistance (Megger) test on the motor or motor cables. Do notconduct these tests on the drive.Motor connection specificationsMotor connection specificationsVoltage (U2 ) 0ÖU1 , 3-phase symmetrical, Umax at the field weakening pointFrequency 0Ö500 HzFrequency resolution 0.01 HzCurrent See section Ratings on page 259.Field weakening point 10Ö500 HzSwitching frequencySelectable. See the availability in the table below.Cable temperature rating 90 ∞C (194 ∞F) rating minimum.Maximum motor cablelengthSee sections Motor cable length for 400 V drives on page 272 andMotor cable length for 600 V drives on page 273.1, 4 and 8 kHz 12 kHz208Ö240 V All types Frame sizes R1ÖR4380Ö480 V All types, except forACS550-01-246A-4 only 1and 4 kHzFrame sizes R1ÖR4,except ACS550-01-087A-4and ACS550-U1-097A-4500Ö600 V All types Frame sizes R2ÖR4
