Table of Contents
Advertisement
5.2.4 Mounting of horizontal drive shafts for three units
The following applies to the fitting of drive shafts and their
protective tubes when the tap-changer consists of three
phases UCL.T/VUCL.T or UCLYD/VUCLYD. The tap-changer
unit, which is placed closest to the drive mechanism, is called
unit -1, the next unit -2 and the last unit -3; see Fig. 26.
1. Mount the drive shaft to the tap-changer unit -1 according
to Section 5.2.2, steps 1–8.
2. Mount the drive shaft between unit -1 and unit -2
according to Section 5.2.3, steps 1–8.
3. Mount the drive shaft between unit -2 and unit -3
according to Section 5.2.3, steps 1–8.
The shaft here is SA34, the protective tube closest to
unit -2 is SA35 and the other protective tube is SA36.
When a support bearing is used, follow the appropriate parts
of Section 5.2.3, steps 2–8.
WARNING
The bevel gear contains moving gears. Observe
caution!
5.2.5 Before operation
1. Check again that the tap-changer and the motor-drive
mechanism are at the same position.
2. Remove the locking device for the motor-drive mechanism;
see Fig. 44.
Fig. 44. Locking device for motor-drive mechanism.
40 Installation and commissioning guide UCL/VUCL | 1ZSC000562-AAZ en
5.3 Supervisory equipment
Accessories and safety devices are described in a separate
document,
changers, 1ZSC000562-AAD
5.4 Assembly of accessories
All parts that have been removed for transport are specified
on the packing list. The openings on the tap-changer are
sealed by a transport cover.
1. Remove the transport covers.
2. Check the O-rings. Make sure that they are pressed into
the bottoms of the grooves on the flanges.
3. Assemble all remaining accessories. Tightening torque for
the nuts is according to Section 1.8.
5.5 Connection to the oil conservator
Remove the transport cover on the flange for connection to
the oil conservator. Make sure that the O-ring is in place on
the flange and connect the pipe to the oil conservator. Tighten
the nuts; see Fig. 45.
Locking device
BUE
If transformer ratio measurement is to be conducted
after drying, this is a suitable stage to carry it out; see
Section 3.4.2.
Accessories and protection devices for on-load tap-
.
If oil filling is carried out under a vacuum without the
oil conservator, the steps in this section are performed
after oil filling.
BUL
Advertisement
Table of Contents
