Drying; Preparations - ABB VUBB Installation And Commissioning Manual

Vacuum on-load tap-changers
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5 Drying

5.1 Preparations

Procedure
1.
Remove the bolts (2), and then the top cover (1).
2.
Remove the O-ring (3).
3.
Put the parts in storage in a dry and dust-free area.
End of instruction
Installation and commissioning guide
1ZSC000562-AAK EN, REV. 2, 2019-07-03
CAUTION!
Carefully lift the top cover straight up.
The shaft for the bevel gear can bend if
the top cover is not lifted straight up.
CAUTION!
Do not drop bolts or other small parts
into the tap-changer.
Objects that fall into the tap-changer
can prevent the free movement of the
mechanism, or cause electrical short
circuits.
29

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