ABB UniSec Manual page 20

Figure 52. Example of main busbar connections
for 3 SDC 375 units (with 12-17.5 kV)
NOTE
Insulating terminal covers are installed in the
end units. For 24 kV, a rubber terminal cap is
installed in all the units.
NOTE
Make sure the busbar spacers are positioned
as shown in the figures below.
20
The following figures show the busbar connections for units
with switch-disconnector. The components required are indi-
cated in Table 5. The main busbar connections of each unit
type with different rated currents and voltages are shown. Each
figure gives a reference to the corresponding numbers of the
components in Table 5.
All unit types
Part Name
1. Round-headed socket screw M10x40
2. Round-headed socket screw M10x45
3. Round-headed socket screw M10x50
4. Round-headed socket screw M10x60
5. Cheese-head socket screw M10x65
6. Cheese-head socket screw M10x70
7. Rubber cap for local terminal
8. Ring field control
9. Insulating terminal cover
10. Insert
11. Busbar
12. Conical spring washers D10
13. Hexagonal nut M10
14. Busbar spacer
15. Shim washer d20x2
16. Round-headed socket screw M10x30
17. Hexagonal-headed screw M12x40
18. Hexagonal-headed screw M12x60
19. Nut M12
20. Conical spring washer D12
21. Round-headed socket screw M12x50
22. Busbar spacer D12
23. Round-headed socket screw M12x30
Table 5. List of components used