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, 14 and 15.
Proceed as follows:
1. Mount the motor-drive mechanism onto the transformer.
The mounting holes on the transformer should be leveled
within 1 mm. If adjustment is needed, shims should be used.
2. Install the bevel gear on the edge of the transformer cover.
3. Check that the position indicator in the motor-drive
mechanism shows the same position as the indicator
inside the top cover of the tap-changer.
WARNING
Do not energize the transformer before the tap-
changer and motor-drive mechanism are correctly
assembled.
1ZSE 5492-118 en, Rev. 5 | Installation and commissioning guide UBB 23