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Tettex 2293 - Page 168

Tettex 2293
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164
Dynamic resistance on tap
changer
Taps to be measured, by clicking the textbox
with the tap number the tap position can be
selected
Testing order direction. Recording will be
done when:
Up -> Only when increasing the tap
Down -> only when decreasing the tap
Both -> one increasing and decreasing tap.
Normal procedure is to select both and
collect data one increasing and when
decreasing the tap number
A cleaning cycle is defined as a movement
of the complete tap changer from button to
upper tap position and reverse. This is
useful as some taps have not been used
since long and rest of oil can show bad
results due to poor contact. A claiming cycle
will remove this thin oil layer.
The number of cleaning taps to be done is
introduced in the corresponding text box.
If tap changer accessory is available and
connected, the operation mode can be
switched to remote and the instrument will
then send the order to the tap changer to
change position once measurement has
been finalized.
For information about connection of the
remote tap changer accessory please refer
to chapter 17 Tap Changer Interface.

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