Rockwell Automation 592- E300 Overload Relay User Manual - Manual (Page 242)

242 Rockwell Automation Publication 193-UM015B-EN-P - June 2014
Chapter 7 Metering and Diagnostics
Current Imbalance
Current Imbalance (Parameter 52) reports the percentage of uneven current
consumption in the monitored power system. Current Imbalance is defined by
the following equation:
Current Imbalance = 100% * (Id/Ia)

where
I
d
= Maximum Line Current Deviation from the Average Current

I
a
= Average Current
Table 255 - Current Imbalance (Parameter 52)
Voltage Monitor The E300 Electronic Overload Relay’s voltage monitor diagnostics provides
information on the voltage being supplied to the load. The voltage diagnostics
include three phase voltage, phase imbalance, phase rotation, and frequency.
L1-L2 Voltage
L1-L2 Voltage (Parameter 53) reports the voltage in volts in reference to the T1
and T2 power terminals of the E300 Electronic Overload Relay Sensing Module.
Table 256 - L1-L2 Voltage (Parameter 53)
Default Value 0
Minimum Value 0
Maximum Value 200
Parameter Type UINT
Size (Bytes) 2
Scaling Factor 1
Units %
Default Value 0.0
Minimum Value 0.0
Maximum Value 6553.5
Parameter Type UINT
Size (Bytes) 2
Scaling Factor 10
Units Volts