Nuova Via di Piano Comprensorio Vulcano
Sesto San Giovanni, MI 20099 Italy
Tel. 02-24105.001
IS 2653 GB
Page
9
of
18
Figure 6 – Example of lifting hooks on main flange and on outdoor and indoor sides extremities
To lift the bushing connect the crane to the central flange hooks and use a pulling device (Tirfor) to connect the
hooks placed on the outdoor side flange to compensate the mass unbalancing (see
Figure 7
). Lift carefully
and compensate the mass unbalancing by acting on the pulling device until the bushing is approximately
horizontal. In any case,
before lift the bushing please strictly follow the steps indicated into the provided erection
and installation manual (IS 2654 GB).
Figure 7 – Example of bushing extraction and lifting
CAUTION:
The two composite insulators are protected by a PE plastic foils. Remove the protection only after
the installation of the bushing on the wall and just before the energizing.
CAUTION:
To lift the bushing do not wrap ropes (i.e. ‘tie’ lifting method) around the silicone sheds. The
composite insulators will be seriously damaged.
CAUTION:
It is not allowed to step on the composite insulators. The silicone sheds can be seriously damaged.
CAUTION:
The centre of gravity point is not symmetrical respect the bushing geometry. Care must be taken to
compensate the mass unbalancing before and during the lifting operation.
Outdoor side
Indoor side
Pulling device
(Tirfor)
