MI 2130 VoltScanner
Setting Up the VoltScanner
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below the set threshold for at least three cycles.
The following picture shows a short frequency variation (high frequency), lasting only
two cycles.
Frequency Variation
Voltage Interruptions
Voltage Interruptions can be the result of power system faults, equipment failures and
control malfunctions. Interruptions can be classified into two categories:
•
long interruptions (longer than three and a half minutes)
•
short interruptions (up to three and a half minutes)
Long interruptions are often permanent and require human intervention to repair the
system for restoration. The VoltScanner records an interruption, if voltage drops below
90Vrms for at least one cycle (20ms/50Hz).
Periodics mode
In this mode the VoltScanner records the mean values of the supply voltage over a
given sampling interval. It also records the minimum and maximum cycle during each
sampling interval. This sampling interval is set in
Periodics
section by choosing
minutes or seconds and setting the time with up and down buttons. It can be set
between 1 second and 21 minutes at 50 Hz and 1 second and 18 minutes at 60 Hz.
The Estimated time tells you how long the VoltScanner will be recording before it runs
out of memory. If sampling interval is 1 second, this will be approximately 1 hour and for
sampling interval of 21 minutes, VoltScanner will keep recording for 47 days.
General Settings
There are some general parameters in the Instrument Settings window that have to be
set regardless of the thresholds chosen in Event & Transient or Periodics section.
Frequency
In this section the nominal frequency (50Hz or 60Hz) of the supply voltage must be set.
