20
1ZSE 5492-115 en, Rev. 5
fm_00073
4 Installation on the transformer
4.3 Connection to the oil conservator
See Fig. 9.
Remove the transport cover from the ange for the oil conservator. Check that the
O-ring is in place on the ange and connect the pipe to the oil conservator.
In cases where the oil conservator is installed directly on the top of the on-load tap-changer,
install the oil conservator directly on the ange with the connection sealed by an O-ring that
is left on the ange when the transport cover is removed. After that, the other bracket of the
conservator is mounted to the tank.
For UZ with normal barrier, the oil level difference between on-load tap-changer and trans-
former should be a maximum of 1.2 m. For a reinforced barrier, the oil level difference may
be 8 m.
CAUTION
Where the conservator is common to the transformer and the on-load tap-changer, an oil
lter must be placed in the pipe between the on-load tap-changer and the conservator.
Filter with housing can be ordered from ABB, ordering No. LL 114 004-AP.
O-ring 64.2 x 5.7
Ø 52
Ø 100
Ø 130
Stud M12
Fig. 9. Attachment ange for oil conservator.
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