Dynamic resistance on tap
changer
By clicking the current Box, a window will
pop up proposing several maximum
currents. The maximum selectable current
for this test is 12A.
Any value can also be introduced by clicking
over the “user defined values” textbox.
Two connections modes can be selected by
how the sort circuit is done in the not
measured transformer winding.
LV winding short circuited by the
device (recommended)
LV winding short circuited externally,
the operator is then responsible of
removing the non tested winding
measuring cables and performing
the short circuit
15.4.5 Static resistance settings
To access the measuring parameters, click setup button in the bottom of the screen, and then
select “Static” folder.
Record static resistance can be activated and deactivated by clicking the checkbox before
“Record static resistance values simultaneous”. If activated, after each tap change the instrument
will stabilize and record the resistance value. This will slow down the overall procedure but will
collect valuable information.
The static resistance can be measured while
tap changer is increasing tap position (up),
while is lowering tap position (Down) or bot
cases (Up & Down).
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