204 Rockwell Automation Publication 193-UM015D-EN-P - February 2015
Chapter 6 Protective Trip and Warning Functions
Over Frequency Warn Level
Over Frequency Warn Level (Parameter 376) allows you to define the frequency
at which the E300 Electronic Overload Relay indicates a warning. It is user-
adjustable from 46…65 Hz.
Table 246 - Over Frequency Warn Level (Parameter 376)
Power-based Protection
The E300 Electronic Overload Relay can digitally monitor the power that is
supplied to an electric motor to help protect against poor power quality or alert
you when power consumed by the motor differs from what is expected. This
protection is useful for pump cavitation and pump material change detection.
The following E300 Sensing Modules provide power monitoring capabilities.
Table 247 - Power Capabilities
This power information is used for the following protective trip and warning
functions:
• Under Real Power (kW) Trip/Warning
• Over Real Power (kW) Trip/Warning
• Under Reactive Power (kVAR) Trip/Warning
• Over Reactive Power (kVAR) Trip/Warning
• Under Apparent Power (kVA) Trip/Warning
• Over Apparent Power (kVA) Trip/Warning
• Under Power Factor Trip/Warning
• Over Power Factor Trip/Warning
Default Value 62
Minimum Value 46
Maximum Value 65
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 1
Units Hz
The Over Frequency Warning function does not include a time delay feature.
Once the Over Frequency Inhibit Time has expired, the Over Frequency 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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