Rockwell Automation Allen-Bradley E300

Rockwell Automation Publication 193-UM015D-EN-P - February 2015 327
Metering and Diagnostics Chapter 8
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% * (I
d
/I
a
)
where
I
d
= Maximum Line Current Deviation from the Average Current
I
a
= Average Current
Table 399 - 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 400 - 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