Placing tap-changer into neutral
1. Place a 3/8" socket and ratchet on the output shaft of
the motor; rotate the motor so that the contacts and
other components are aligned in the neutral position
2. Confirm that the regulator is in the neutral position.
A. Main movable contacts are located on the neutral
stationary contact, which is located at the 11 o’clock
position and under the reversing switch movable
contact assembly. See Figure 153.
B. The reversing movable contact is located on the
reversing neutral stationary contact. See Figure154.
24. If none is present, apply Loctite® 243 threadlocker
to the two actuator finger bolts and then install the
actuator finger. It may be necessary to reposition the
movable contact insulator arm if the holes do not quite
line up. See Figure 152.
25. Place the tap-changer into the neutral position. See the
next section for instruction on how to confirm that the
tap-changer in the neutral position.
26. Reinstall the number 1 stationary contact and tighten
the nuts to a torque of 80–90 in-lbs (9.0–10.2 Nm).
Figure 153. Neutral stationary contact.
Neutral
Stationary
Main
Movable
Figure 152. Installing the actuator finger.
Actuator
Finger Bolts
Figure 154. Neutral position for reversing movable.
Reversing
Movable
Contact
Reversing
Neutral
Stationary
52
QD5 QUIK-DRIVE TAP-CHANGER INSTALLATION AND MAINTENANCE INSTRUCTIONS MN225012EN March 2016
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