MR ETOS ED - Page 67

6 Mounting
Maschinenfabrik Reinhausen GmbH 2020 676385142/08 EN ETOS
®
ED
7. Once the diverter switch operation begins, continue to turn in the same di-
rection while counting the tap-change indicator sections required for the
pointer to reach the mid-position of the area marked in gray on the tap-
change indicator. Note the number counted (value B) and the direction of
rotation (example: B=5).
Figure48: Counting the tap-change indicator sections needed to reach the mid-position
8. If value B is greater than 8 tap-change indicator sections, the tap-change
operation has been completed correctly. If value B is less than 8 tap-
change indicator sections, turn another 8 B tap-change indicator sections
in the same direction (example: 8-5=3) to complete the tap-change opera-
tion. Then turn in the opposite direction until the pointer is in the mid-posi-
tion of the area marked in gray on the tap-change indicator.
Figure49: Completing the diverter switch operation
9. If the values obtained for A and B are identical, the on-load tap-changer
and the motor-drive unit are correctly coupled (a slight imbalance of maxi-
mum 1 tap-change indicator section is permitted). If the values obtained
for A and B are different, establish correction value C by halving the differ-
ence between A and B: C=|(A-B) x 0.5|
Example: C=|(2-5) x 0.5|=|-1.5|=1.5