CARLO GAVAZZI VMU-C EM, Instruction Manual

Page: 78 / 126

VMU-C
VMU-C Instruction manual 78
5.3
”VOLTAGES” CHART
Voltage trend chart
The Chart compares the 2 voltage sets of data (VLNsys: star system voltage and
VLLsys: line system voltage).
These values refer to the instrument of choice (real or virtual according to the system
configuration settings).
Should the reference instrument be virtual, the voltages shown in the chart represent the
average value of the voltages measured by each individual real instrument.
Data may be displayed on a daily, monthly or yearly basis.
Note : in charts the sampling frequency (current values for each phase), depends on the
storage interval set on VMU-C, which must be equal to 5,10,15,30,60 minutes.