Mounting Of Horizontal Drive Shaft For Two Units - ABB UCL Installation And Commissioning Manual

5.2.3 Mounting of horizontal drive shaft for two units

The following applies to the fitting of drive shafts and their
protective tubes when the tap-changer consists of two
phases UCL.B/VUCL.B. The tap-changer unit, which is placed
closest to the drive mechanism, is called unit -1, and the
second unit -2; see Fig. 26.
Mount the shaft between the motor-drive mechanism and
unit-1 according to Section 5.2.2.
Mount the shaft between unit-1- and unit-2 according to the
following instructions:
1. Determine the distance K3 between the spherical shaft
ends; see Fig. 39.
2. Cut the horizontal square shaft SA30 to length = K3 minus
6 mm. Remove burrs.
3. Cut the protective tubes SA31 and SA32 at the non-
slotted end to the length LB3 = (K3+500 mm)/2; see
Fig. 40.
4. Fit two coupling halves, SA11, on one end of the square
shaft with six screws SA12 and washers SA13. Push the
shaft to the bottom of the fitting in the coupling halves;
see Fig. 31. Tighten the two screws; A first and then the
other; see Fig. 41. Fit the two protective tubes, SA31 and
SA32, the slotted end of SA31 in the non-overlapping end,
and two hose clips SA10; see Fig. 40.
5. Remove the locking device on the bevel gear of the
diverter switch housing by loosening the two set screws;
see Fig. 43.
Fig. 39.
38 Installation and commissioning guide UCL/VUCL | 1ZSC000562-AAZ en
K3
6. Connect the square shaft with the mounted coupling
halves to the shaft of the bevel gear closest to the motor-
drive; see Fig. 41. Mount two coupling halves SA11 to the
other end of the square shaft and to the shaft of the bevel
gear on the tap-changer. Push the shaft to the bottom
of the fitting in the coupling halves; see Fig. 31. Lightly
tighten the screws and check that the shaft can be moved
approximately 2 mm in the axial direction (axial play).
Check the dimension shown in Fig. 30. Tighten the two
screws; A first and then the other.
The unit should be at the same service position as the
adjacent unit and be at the exact position. Compare
with the adjacent unit and adjust this unit as described in
Section 5.2.3, point 7 if necessary.
WARNING
The bevel gear contains moving gears. Observe
caution!
7. Push the two protective tubes on the bevel gears and
clamp them with the hose clips SA10; see Fig. 42. Apply
the self-adhesive information plates SA25 around the
tubes at about the middle of the tube length.
The slot on the protective tubes should be facing
downwards.
8. Mount the protective cover SA33. Tighten the two set
screws, (taken from the locking device); see Fig. 43.
SA30 SA32
Fig. 40.
LB3
A
SA10 SA31 SA11