Rockwell Automation 7763 Medium Voltage OneGear SMC Flex Motor Controller (10-15 kV) - Manual (Page 23)

Rockwell Automation Publication 7760-UM001D-EN-P - October 2014 23
Product Overview Chapter 1
Selectable Kickstart
Selectable kickstart provides a power boost at start-up that is user-adjustable from
0…90% of locked rotor torque. The additional power helps motors generate
higher torque to overcome the resistive mechanical forces of some applications
when they are started. The selectable kickstart time is user-adjustable from
0.0…2.0 seconds.
Figure 9 - Selectable Kickstart
Current Limit Start
This starting mode provides a true current limit start that is used when limiting
the maximum starting current is necessary. The Current Limit level is user-
adjustable from 50%…600% of the motor's full-load ampere rating, and the
current limit time is user-adjustable from 0…30 seconds. Once the MV SMC Flex
controller senses that the motor has reached the up-to-speed condition during
the current limit starting mode, the output voltage automatically switches to full
voltage and the bypass contactor is closed.
Figure 10 - Current Limit Start
Kickstart is also available with Current Limit Start, Dual Ramp Start and Linear
Acceleration.
100%
Start Run
Percent
Voltage
Start Run
Time (Seconds)
Initial
Torque
Kickstart
Percent Full
Load Current
Start
Time (seconds)