ABB UCL Installation And Commissioning Manual page 29

Carry out another three operations in the same direction while
pushing down the diverter switch.
For UCL, it may be necessary to push and pull the
lifting device for the diverter switch a little back and
forth while pushing down.
The top part of the diverter switch lifting device should be
below the level of the upper part of the housing for the cover
Transition resistors
Guide pins
Coupling disk
Notch for
drive pin
Guide bar
for diverter
switch
Fig. 23.
Drive pin
UCL
Diverter switch housing, view from above
when lowered to its final position. Only the springs of the
lifting device should be above this level.
Insert the O-ring for the cover in the upper flange. Mount the
tap-changer cover. Turn the cover so that the guide pin in
the housing is facing the guide hole in the cover. (The cover
must be pressed down in order to overcome the force of the
springs that hold the diverter switch pressed in place.) Fit the
screws and washers and tighten them.
Buffer springs
Lifting device
Serial number (on
the opposite side
of the diverter
switch)
Plug-in contacts
Coupling with
drive pin
Holes for guide pins
A–A
Oil drainage
tube
1ZSC000562-AAZ en | Installation and commissioning guide UCL/VUCL 29
Transition
resistor
Guide pins
VUCL
Slot for guide bar
Guide pins
Slot for the oil
drainage tube