Final Assembly; Mounting Of The Motor-Drive Mechanism - ABB UBB Series Installation And Commissioning Manual

5. Final assembly

5.1 Mounting of the motor-drive mechanism

See figs. 1, 13 and 14.
Proceed as follows:
1.
The mounting holes on the transformer should be leveled within 1 mm. If adjustment is
needed, shims should be used.
2.
3.
Do not energize the transformer before the on-load tap-changer and motor-drive
mechanism are correctly assembled.
1ZSE 5492-118 en, Rev. 4
Mount the motor-drive mechanism onto the transformer.
Install the bevel gear on the edge of the transformer cover.
Check that the position indicator in the motor-drive mechanism shows the same posi-
tion as the indicator inside the top cover of the on-load tap-changer.
WARNING
5 Final assembly
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