ABB VersaRupter Installation, Operation And Maintanance Manual - page 49
VersaRupter MV Indoor Switch | Installation and Operation Manual
49
Replacement of Fixed Contact and Arcing Chamber
3. Replace the pressure spring back in the hole and place
the contact onto the insulator making sure the cutouts
in the arcing tips, see figure 117, are seated on the
pressure spring.
4. Replace the thermal disc (600 A) and arc chute and
screw the assembly down to secure it. See the correct
torque values in the “Torque Values for Self Tapping
Screws” section.
Note:
Damaged parts must be replaced.
The arcing contacts (3.6) must be seated correctly on the
pressure spring (3.7).
When mounting the thermal disc (3.4) and the arcing
chamber (3.3), the main contact (3.5) must be pressed
firmly against the hollow insulator (3.8). Attach the whole
assembly by screws (3.1). For correct torque values, see
the “Torque Values for Self Tapping Screws” section.
Check correct position of the arcing contacts and test for
correct functionality. Grease the contact area with
ISOFLEX TOPAS NCA 52.
Figure 117
Figure 118
Figure 119