METREL MI 3399, Instruction Manual With Exercises

Page: 148 / 272

Power and Voltage Quality Trainer AD 2
– MI 3399
148
Figure 4-9: Table view
Depending on the parameter we're observing in “Table” view (in our case current), few
options are shown:

Min
– presents minimal 10/12 cycle RMS value in given time interval,

Avg
– presents RMS average of 10/12 cycle RMS in given time interval,

AvgOn
– presents only non-zero RMS average of 10/12 cycle measurements in
given time interval (same as Avg, but doesn’t take zero measured values into
account). This measurement is useful for evaluating switch type of load

Max
– presents maximal 10/12 cycle RMS value in given time interval.
Other data (power, harmonics, etc.) can be accessed and analysed in similar fashion.
4.2 Exercise 2
– Voltage Dip
In this exercise, we will show how the instrument should be setup in order to capture
and observe a voltage dip. Voltage dip is a temporary reduction of the voltage
magnitude at a point in the electrical system below given limit. Before start, please set
the switch S1 in the Application Trainer to ON as shown in the table below. The
remaining switches should be set to OFF.
Switch Description State
S1 Dip
ON
The Application Trainer will simulate an electrical system with the following
parameters:

Fundamental voltage: 230 V

Fundamental current: 1000 A