184 Rockwell Automation Publication 193-UM015D-EN-P - February 2015
Chapter 6 Protective Trip and Warning Functions
• L3 Line Loss Warning is enabled
• L3 Line Loss is activated via the appropriately programmed digital input
(see Input Assignments, Parameters 196…201, in
Chapter 4)
• Line Loss Inhibit Timer has expired
• L3 Percent FLA (Parameter 49) is equal to 0%
When the L3 Line Loss Warning conditions are satisfied, the:
• TRIP/WARN LED flashes a yellow 16-short blink pattern
• Bit 15 in Current Warning Status (Parameter 10) sets to 1
• Bit 1 in Device Status 0 (Parameter 20) sets to 1
• Any relay outputs configured as a Warning Alarm close
Voltage-based Protection
The E300 Electronic Overload Relay can digitally monitor the voltage supplied
to an electric motor to help protect against poor voltage quality. You can prevent
a contactor from energizing if the voltage is either too high, too low, or wrong
rotation. The following E300 Sensing Modules provide voltage monitoring
capabilities.
Table 221 - Voltage Capabilities
This voltage information is used for the following protective trip and warning
functions:
• Undervoltage trip/warning
• Overvoltage trip/warning
• Voltage imbalance trip/warning
• Phase rotation mismatch trip
• Under frequency trip/warning
• Over frequency trip/warning
Voltage Trip Enable (Parameter 184) and Voltage Warning Enable (Parameter
190) are used to enable the respective voltage-based protective trip and warning
functions.
The L3 Line Loss Warning function does not include a time delay feature. Once
the Line Loss Inhibit Timer has expired, the L3 Line Loss Warning indication is
instantaneous.
Catalog Number Measurement Method L-L Voltage Trip/Warning Range
193-ESM-VIG-__-__ Internal 20…800V
592-ESM-VIG-__-__ Internal 20…800V
193-ESM-VIG-30A-CT External 20…6500V
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