Tettex 2293 - Measurement Results

166
Dynamic resistance on tap
changer
The triggering of the measurement is automatically done by the instrument, no configuration or
particular settings are needed for this purpose.
The following steps are performed while measuring the tap changer. Steps 3 to 5 will be repeated
for all taps selected in the settings. Step 6 is only necessary if the tap changer accessory is not
available.
Click start button to initiate the
test
Instrument will then require the
operator to drive the tap changer
to a starting position, normally
position one
Instrument will charge and
stabilize
If static resistance is selected,
then it will be measured
The instrument will be waiting for
a tap changer, operator have to
change the transformer tap
position
Only if tap changer accessory is
not connected !
Operator change the tap
position, instrument record the
curve.
Instrument record the curve,
and start the cycle for the next
tap position
15.4.10 Measurement results
The instrument records the curve data, as well as some curve parameters:
tFall [mS]:
Time from the staring of the tap changer movement (drop in current) until the
minimum current is reached