Cooper QD3 - Page 61

S225-12-1
61
!
SAFETY
FOR LIFE
Tap-changer Removal from
Voltage Regulator
1. Remove the internal position indicator shaft from the
tapchanger indicator drive tube. (See Figure 181.)
Figure 181.
Internal flex shaft.
Internal Flex
Tapchanger
Internal Drive Tube
2. Use a pair of diagonal side cutters cut and remove the
cableties from the control winding hard insulation tube
and tapchanger top bracket assembly. (See Figure
182.)
Figure 182.
Control cable fastening.
Cable Tie
3. Use a 9/16 inch socket and ratchet to loosen and
remove the nut and carriage bolt fastening the tap
changer bracket to the regulator side channel. (See
Figure 183.)
Figure 183.
Tap-changer and side channel fastener.
4. Using a Phillips head screwdriver, loosen and remove
the TCB terminal board leads from the 14 position
terminal board located on the top right of the QD3 tap
changer. (See Figure 184.)
TABLE 21
Lead Color and Termination Points
Lead Color TCB Connection
Blue/White 1
Green/White 5
Blue 9
Green 10
Orange 11
Red/Black 13
White G
Figure 184.
TCB lead color and termination points.
White Position G
Red/Black
Position 13
Orange
Position 11
Green
Position 10
Blue
Position 9
Green/White
Position 9
Blue/White
Position 9
Carriage Bolt Nut