Final Assembly; Mounting Of Motor-Drive Mechanism - ABB UCL Installation And Commissioning Manual

5. Final assembly

5.1 Mounting of motor-drive mechanism

See Figs. 24 and 25.
Proceed as follows:
1. Mount the motor-drive mechanism onto the transformer.
The mounting holes on the transformer should be level
within 1 mm. If adjustment is needed, shims should be
used.
2. Install the bevel gear SA 21 on the edge of the transformer
cover; see Fig. 26.
3. Check that the position indicator on the motor-drive
mechanism shows the same position as the indicator
inside the bevel gear of the tap-changer. (The cover has to
be removed.)
WARNING
Do not energize the transformer before the tap-
changer and the motor-drive mechanism are correctly
assembled.
30 Installation and commissioning guide UCL/VUCL | 1ZSC000562-AAZ en