Installation and commissioning guide
1ZSC000562-AAK EN, REV. 2, 2019-07-03
65
8.2.2 Testing of BUL2
Procedure
1.
Remove the cover (1).
G004276
2.
Make sure that the position indicators (7) and (8)
show the same position.
CAUTION!
If the position indicators show different
positions, catastrophic failure of the
transformer can occur.
G004437
3.
Operate the tap-changer with the hand crank, and count the number of turns from the exact position
until the tap-changer operates.
•
A full operation of the tap-changer takes 11.5 ± 1 turns of the hand crank.
NOTE!
The tap-changer is in the
exact position
when the operation is completed and the contacts
are centered.
NOTE!
If the tap-changer does not operate correctly, do a check of the drive shaft couplings.
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