ABB VersaRupter Installation, Operation And Maintanance Manual - page 53
VersaRupter MV Indoor Switch | Installation and Operation Manual
53
Replacement of Parts 38 kV
Contact Knives
Ensure the VersaRupter is open and the A-mechanism is not
charged (if equipped).
1. Detach the draw bar from the jack shaft by removing
the cir-clip and washer as shown in figure 123.
2. Remove the contact screw found in figure 124 allowing
the contact knives to be removed.
3. Lubricate the new contact blades with ISOFLEX TOPAS
NCA 52 and attach them back to the lower terminal
with the contact screw from the previous step.
4. Ensure that the contact knives can easily move and
operate while making connection with the stationary
contacts when closing.
5. Check the alignment of the arc blades when entering
the arc chute.
6. Connect the draw bar to the jack shaft and secure it
with a cir-clip.
7. Put contact grease on the main contacts before test-
ing. The contact position is adjusted by the eccentric
bolt on the operating shaft. It can also be adjusted by
moving the lower insulator.
Figure 123
Figure 124
These operations must be carried out by
specialists only! Improper installation may
result in serious injury or death.