Rockwell Automation 592- E300 Overload Relay User Manual - Manual (Page 132)

132 Rockwell Automation Publication 193-UM015B-EN-P - June 2014
Chapter 5 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 3)
• 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 will flash a yellow 16-short blink pattern
• Bit 15 in Current Warning Status (Parameter 10) will set to 1
• Bit 1 in Device Status 0 (Parameter 20) will set to 1
• Any relay outputs configured as a Warning Alarm will close
Voltage Based Protection The E300 Electronic Overload Relay has the option to digitally monitor the
voltage supplied to an electric motor to protect against poor voltage quality. The
user 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 117 - Voltage Capabilities
This voltage information is used for the following protective trip and warning
functions:
• Under Voltage Trip/Warning
• Over Voltage 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.
IMPORTANT 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