GEH-6385 Reference and Troubleshooting, 2300 V Dr ives Chapter 4 Wizards
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Drive Commissioning: Motor Crossover Voltage
Crossover Voltage specifies the voltage above which field weakening occurs. Field
weakening allows the drive to achieve greater motor speeds with out increasing
voltage by decreasing the volts per hertz ratio.
Set Crossover Voltage to the appropriate voltage level. If Crossover Voltage is set to
<No Value>, the drive begins field weakenin g at the voltage specified by Motor
rated voltage, which was defined previously.
Related functions
• Primary Motor & Application Data
Drive Commissioning: M otor Protection Class
The motor protection cl ass indicates the motor's cap acity to run under overload
conditions. The following values are available for th e motor protection class:
• Class10:150%for30sec: IEC motors. Motor can withstand 150% overload for 30
seconds.
• Class20:150%for60sec: US standard motors. Motor can withstand 150%
overload for 60 seconds.
• Class30:150%for90sec: Specially designed motors. Motor can withstand 150%
overload for 90 seconds.
The drive uses the protection class information to determine motor thermal
characteristics which are used in protective funct ions.
Select the motor protect ion class that corresponds to th e motor connected to the
drive.
Related functions
• Timed Overcurrent Detection
Drive Commissioning: Motor Poles
Parameter Motor poles specifies the number of magnetic poles in th e motor. If the
correct value is kn own, enter it. Otherwise leave blank or set to <No Value>, in
which case the drive will calculate the number from motor nameplate data. It is
recommended that th e correct value be obtained and enter ed if parameter Motor
rated rpm is less than 900.
Related functions
• Primary Motor & Application Data
Drive Commissioning: Motor D ata Sheet
The motor data sheet provides additional motor parameters beyond what is available
on the motor nameplate. This includes equivalent circuit data, winding resistances
and winding inductan ces. Flux curve data is also often in cluded. If the motor data
sheet is not available for the applied motor, the control will determine the motor
parameters during the tune-up phase.