User Manual

Rockwell Automation Publication 193-UM002I-EN-P - December 2011 135
Chapter 6
Monitoring Parameters
Introduction
This chapter provides information for the current monitoring and diagnostic
parameters of the E3 Overload Relay.
Phase Current Reporting
Current Range
The E3 Overload Relay utilizes a true RMS algorithm to calculate the RMS value
of the current passing through phase L1, L2, and L3. The relay is capable of
sensing currents ranging from 0%…720% of the maximum FLA Setting.
The following chart illustrates the reporting current precision, the minimum and
maximum reporting current values, and the 720% maximum FLA value for each
current range.
IMPORTANT
The E3 Overload Relay will report 0 A or 0% FLA if the current
is below 30% of the minimum FLA Setting.
IMPORTANT
The E3 Overload Relay is capable of reporting values greater
than 720% of the maximum FLA Setting, but the accuracy of
the value may be compromised.