Tettex 2293 - Page 158

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Dynamic resistance on tap
changer
Following parameters are calculated and recorded by the device for each tap change.
tFall [mS]:
Time from the staring of the tap changer movement (drop in current) until the
minimum current is reached
tRise [mS]:
Time from minimum current reached until current becomes stable
Delta:
Current drop from stabilization to the minimum while changing tap