Cooper QD3 - Page 34

QD3 Quik-Drive Voltage Regulator Tap-Changer Manual
34
CAUTION:
Do not remove lead ties from lead bundles hold-
ing the tap leads in a certain position. Try to keep
from moving the lead bundles from normal position.
Doing so can result, possibly, in de-electric failures.
6. Use a deep well 9/16 inch socket with ratchet or
a 9/16 inch wrench to loosen and remove all lead
connections from the back of the tapchanger contact
board. (See Figure 85.)
Tap Lead
Connections
Reactor P1 & P2
Connections
Figure 85.
Tap leads and reactor connections.
7. Remove the mounting bolts fastening the tapchanger
mounting bracket to the top core clamp. See (Figure
86.) Remove the tapchanger from the regulator and
place on a work surface.
Mounting
Hardware
Figure 86.
Tap-changer to core clamp fastening hardware.
QD3/T350 Tap-Changer Assembly
Separation
1. After removing the tapchanger from the regulator
assembly, use a Phillips one point screwdriver to
loosen and remove the six screws mounting the
Reversing Lower, Raise and Neutral switch located
in the upper left corner of the tapchanger assembly.
(See Figure 87.)
Figure 87.
Lower, raise, and neutral logic switches.
Screws
Neutral
Raise
Lower
Figure 84.
E & P lead connections.
E3
E2
E1
G
!