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TM-5-6120-250-34 Substation Trailer Mounted 500 KVA AC 4160-416Y/240V 208Y/120V 3 Phase 50/60 Hertz Avionics Model 950-2200A Manual
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CHAPTER 5 REPAIR OF LOW VOLTAGE SECTION
engage a pin in the tap changer shaft without difficulty if
4-11. Tap Changer Drive Mechanism Installation
both mechanisms are in the proper position.
a. See  that  the  tap  changer  and  the  drive
c. . Secure the flange with its bolts.
mechanism are both on position "ONE". The tap changer
d. After installation check to see that the wedge
is on position "ONE" when the wedge bridges tap lead A
seats itself properly in each position by observing the
and B and the index marks on the drive shaft and support
torque required to turn the drive mechanism in each
structure are in line with one another.
direction. The mechanism will be at the center of a high
b. Place the drive shaft through the opening in the
torque region when the wedge is properly seated. If the
mounting flange and slide the coupling over the tap
device was correctly reassembled the position indicator
(changer shaft. The slotted end of the coupling shoulder
should accurately show the various positions.
4-5

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