864-5091.9 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DB10 • Revision 06 77/214
Installation
Bolting busbars together The busbars are accessed through the horizontal flanges of the busbar housings
(assembly openings).
➭ Check whether the busbar has been pre-assembled with a post insulator ① .
➭ Align busbar and post insulator horizontally with each other using the clearance of
the busbar hole.
➭ Align the busbars and the links so that the busbar sections are in line and the fixing bolts will
fit through the holes.
➭ Tighten the fixing bolts just a little. The busbar sections must still be able to move.
22.3 Installing further transport units
➭ Repeat the work operations (see page 71, "Preparing busbar assembly") until all transport
units are installed.
22.4 Completing switchgear installation
As a precondition for this work, the switchgear must have been completely assembled as
described above (see page 77, "Installing further transport units").
Tightening
the busbar fixing bolts
➭ Tighten the fixing bolts of all busbars and fixed contacts at all panel joints of the switchgear.
Tightening torque: 40 Nm.
➭ Finally fit the protective caps on the bolted busbar joints.
Checking the contact
overlapping of the
disconnector contacts
In CLOSED position, the contact fingers must rest exactly on the fixed contact of the
disconnector. Check the contact overlapping with suitable means. For open housing covers,
a welding mirror and a pocket lamp are suitable. For badly visible points, a stick-mounted
camera with a flex handle is suitable.
Fig. 72: Example for correct and incorrect position of the contact fingers on the fixed contact
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