ABB VersaRupter Installation, Operation And Maintanance Manual - page 50
Manual is about: MV Indoor Switch 4.76-38 kV, 200-1200 A, 40 & 61 kA
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VersaRupter MV Indoor Switch | Installation and Operation Manual
50
Replacement of Hollow Insulators with Arcing Chamber
1. Using a T40 Torx socket, unscrew screws (3.9) and
detach the insulator.
2. Attach the new insulator to the frame by the two self
tapping screws (3.9)
Notes:
Remember to mount the piston with piston rod (3.10).
For correct torque values see the “Torque Values for Self
Tapping Screws” section.
Do not forget to install the washer and spring washer for
the self tapping screws.
Figure 120
These operations must be carried out by
specialists only! Improper installation may
result in serious injury or death.