Rockwell Automation 7763 Medium Voltage OneGear SMC Flex Motor Controller (10-15 kV) - Manual (Page 39)

Rockwell Automation Publication 7760-UM001D-EN-P - October 2014 39
Product Overview Chapter 1
• The Aux #4 contact is always configured as Normal (N.O.) to control the
line circuit breaker/contactor.
Network inputs can be obtained through proper programming of Option Input
#1 and Option Input #2. (Refer to Appendix B for available options.)
Control Options The MV SMC Flex controller offers the control options described below.
Pump Control Option
This option reduces surges during the starting and stopping of a centrifugal pump
by smoothly accelerating and decelerating the motor. The microprocessor
analyzes the motor variables and generates commands that control the motor and
reduce the possibility of surges occurring in the system.
The motor current will vary during the acceleration period, and may be near the
motor rated starting current. The pump algorithm does not limit starting current
since full voltage is needed to reach full speed with a loaded motor.
The starting time is programmable from 0...30 seconds, and the stopping time is
programmable from 0...120 seconds.
Kickstart is available with this option.
Pump Application Considerations
1. Consult factory if start time settings over 30 seconds are required. The
base rating of the MV SMC Flex is two starts (or one start/stop
combination) per hour, thirty seconds maximum for each operation. A
stopping operation counts as a start for purposes of thermal capacity
calculations.
2. The Pump Control option functions only for centrifugal pumps. It is not
suited for positive displacement, piston, or other types of pumps.
3. The Pump Stop option functions only for a centrifugal pump running at
greater than approximately 2/3 of the motor rated horsepower.
4. Pump applications with input and/or output valves that are closed during
starting and/or stopping may not benefit from the Pump Control option.
Consult the factory for applications with valves.
IMPORTANT The options listed in this section are mutually exclusive and must be specified
when ordering. An existing controller may be upgraded to another control
option by replacing the control module and possibly other components.
Consult your nearest Rockwell Automation sales office.