ABB UniSec SDS Installation Manuals page 29

D I S T R I B U T I O N S O LU T I O N S
DRS/DRC end or isolating units
For DRC and DRS units, the busbars are not installed
directly on the top of the switch-disconnector or
bushing.
DRS/DRC 12-17.5 kV, 630-800 A end or isolating units
25
1
3
8
1
7
DRS/DRC 24 kV, 630 A end or isolating units
25
1
3
3
8
1
7
DRS/DRC 12-17.5 kV, 1250 A end or isolating units
26
1
3
3
6
1
7
Therefore to tighten the screws properly, the nuts
must be installed under the busbars.
25
1
8
1
7
25
1
8
1
7
26
1
6
1
7
25
1
3
8
1
7
25
1
4
3
8
1
7
26
1
3
3
6
1
7
29
25
1
3
8
1
7
25
1
4
3
8
1
7
26
1
3
3
6
1
7