Rockwell Automation 1426 PowerMonitor 5000 Unit - Manual (Page 52)

52 Rockwell Automation Publication 1426-UM001F-EN-P - November 2013
Chapter 4 Metering
Set-up Parameters
The following set-up parameters specify the configuration of the voltage and
current sensing circuit, how the metered values are scaled, nominal values, update
rate, and averaging. These parameters are found in the power monitor's
Configuration > Metering_Basic web page.
Metering_Mode
Metering_Mode must match the external electrical system and how it is wired to
the PowerMonitor voltage and current input terminals. Refer to the wiring
diagrams in
Chapter 2 . The following are the selections for the Metering_Mode:
0 = Demo
1 = Split-phase
2 = Wye (default)
3 = Delta, 2 CT
4 = Delta, 3 CT
5 = Open Delta, 2 CT
6 = Open Delta, 3 CT
7 = Delta, Grounded B Phase, 2 CT
8 = Delta, Grounded B Phase, 3 CT
9 = Delta, High Leg
V1_V2_V3_PT_Primary
V1_V2_V3_PT_Secondary
VN_PT_Primary
VN_PT_Secondary
These parameters define the transformation ratios of the potential (voltage)
transformers (PTs or VTs) used to connect the power monitor to the measured
power circuit. When the power monitor is directly connected to the measured
circuit (up to 690V L-L), you can specify any 1:1 ratio.
I1_I2_I3_CT_Primary
I1_I2_I3_CT_Secondary
I4_CT_Primary
These parameters define the transformation ratios of the current transformers
(CTs) used to connect the power monitor to the measured power circuit. The
secondary value is permitted to be only 5 A.
Nominal_System_LL_Voltage
Nominal_System_Frequency
These parameters specify the nominal system (line-to-line) voltage and
frequency. The power monitor uses these values to optimize metering accuracy,
and the M6 model uses these values to set thresholds for detection of power
quality events.