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c. If the number of rotations m=k, the connection is correct. If m≠k and m-k>1, the balance of the rotation
difference is required. Loosen the connection of the vertical shaft of the electric mechanism, shake (m-k) 1/2
lap in the direction of multiple turns, and finally connect the vertical drive shaft with the electric mechanism.
d. Following the above steps, check the rotation difference between the electric mechanism and the tap
changer, until the correction results in the same number of turns, that is, m=k
for example:
The connection verification between the SHZV tap changer and the SHM electric mechanism: from the 10
position (setting position) to the 11 position, m=5 circle, from the 11 position back to the 10 position (the
original setting position) k=3 circle, the handle rotates a circle Number difference: mk=5-3=2 turns
Adjust the number of turns (mk) 1/2=1/2(5-3)=1 turn. Loosen the connection between the vertical drive shaft
and the electric mechanism, and turn the handle to position 10→position 11 according to the number of
adjustment turns 24 above. Then connect again.
The gear box can only be adjusted only by rotating its drive shaft. It must not rotate on
its own.
Incorrect adjustment of the gear box can cause damage to the tap-changer!
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