Rockwell Automation 1560E SMC Flex Smart Motor Controller - Manual (Page 21)

Product Overview 1-11
Underload :
Utilizing the underload protection of the MV SMC-Flex controller, motor
operation can be halted if a sudden drop in current is sensed.
The MV SMC-Flex controller provides an adjustable underload trip setting
from 0 to 99% of the programmed motor full load current rating. Trip
delay time can be adjusted from 0 to 99 seconds.
:
Underload protection is disabled during slow speed and braking operations.
Undervoltage ;
Utilizing the undervoltage protection of the MV SMC-Flex, motor operation
can be halted if a sudden drop in voltage is detected.
The MV SMC-Flex controller provides an adjustable undervoltage trip
setting from 0 to 99% of the programmed motor voltage. Trip delay time
can be adjusted from 0 to 99 seconds.
Note: For medium voltage applications, undervoltage protection should be
set from 80 to 99%.
An alarm (pre-fault) indication level can be programmed to indicate the
unit is getting close to faulting. The alarm modification information is
displayed through the LCD, HIM, Communication (if applicable) and
alarm contact closing.
Overvoltage ;
Utilizing the overvoltage protection of the MV SMC-Flex, motor operation
can be halted if a sudden increase in voltage is detected.
The MV SMC-Flex controller provides an adjustable overvoltage trip
setting from 0 to 199% of the programmed motor voltage. Trip delay time
can be adjusted from 0 to 99 seconds.
Note: For medium voltage applications, overvoltage protection should be
set from 100 to 115%.
An alarm (pre-fault) indication level can be programmed to indicate the
unit is getting close to faulting. The alarm modification information is
displayed through the LCD, HIM, Communication (if applicable) and
alarm contact closing.
; Undervoltage, overvoltage, and voltage unbalance protection are disabled during braking operation.