14
1ZSE 5492-118 en, Rev. 4
fm_00201
3. Installation in the transformer
The cover-mounting method or yoke-mounting method is used.
When lifting an UBB model it is recommended to use the lifting eyes on the on-load tap-
changer top section.
WARNING
To put down the on-load tap-changer to stand on the oor without any support means
a risk for tilting with risk for injuries to people and damage to the equipment.
3.1 Cover-mounting
(For yoke-mounting, see section 3.2).
Proceed as follows:
1. Place the gasket (O-ring or plane gasket is usable) around the opening in the transform-
er cover. (This gasket is not included in the on-load tap-changer delivery).
2. Check that the on-load tap-changer ange is positioned in the right way in rotational
relation to the transformer cover.
3. Lower carefully without damaging the terminals the whole on-load tap-changer through
the hole in the transformer cover. If the on-load tap-changer is equipped with tie-in
resistors mounted on the outside terminals, they have to be removed during lowering
the on-load tap-changer through hole in the transformer cover. The studs on the trans-
former cover shall t into the holes in the ange of the on-load tap-changer. Fit washers
and nuts. Tighten.
3 Installation in the transformer
"a"
Top cover
O-ring
Gasket
Nut
Transformer cover
Max 90
o
Lift
Stud bolt
Washer
Tightening of the suction pipe
”a”
Fig. 4. Cover-mounting details.
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