Rockwell Automation 7763 Medium Voltage OneGear SMC Flex Motor Controller (10-15 kV) - Manual (Page 73)

Rockwell Automation Publication 7760-UM001D-EN-P - October 2014 73
Programming Chapter 3
Example Settings
Undervoltage
(1)
With Line Voltage programmed for 11,000V and the Undervoltage level
programmed for 80%, the trip value is 8800V.
Overvoltage
(1)
With Line Voltage programmed for 13,800V and the Overvoltage level
programmed for 115%, the trip value is 15,870V.
Jam
(2)
With Motor FLC programmed for 150 A and the Jam level programmed for
400%, the trip value is 600 A.
Underload
(2)
With Motor FLC programmed for 90 A and the Underload level programmed
for 60%, the trip value is 54 A.
Ground Fault Allows the user to enable the ground fault level in amps, delay time and inhibit time. A separate core
balance current transformer is required. Ground Fault Enable, Ground Fault Level,
Ground Fault Delay, Ground Fault Inhibit
Time, Ground Fault Alarm Enable,
Ground Fault Alarm Level, Ground Fault
Alarm Delay
PTC Allows the user to connect a PTC to the SMC and enable a fault when it becomes active. PTC Enable
Phase Reversal Determines the proper orientation of line connections to the SMC. If Enabled and phases are out of
sequence, a fault will be indicated. Phase Reversal
Restarts Allows the user to determine the maximum number of restarts per hour the unit can experience, and
delay time between consecutive starts. Restarts Per Hour, Restart Attempts,
Restart Delay
(1) The delay time must be set to a value greater than zero when Undervoltage, Overvoltage and Unbalance are enabled.
(2) For Jam and Underload detection to function, the Motor FLC must be programmed in the Motor Protection group. See page 63 .
Parameter Description Option
(1) The average value of the three phase-to-phase voltages is utilized.
(2) The largest value of the three phase currents is utilized.