861-9601.9 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DA10 • Revision 11 75/214
Installation
➭ Modify the length of the disconnector coupling rod by turning the hexagonal sleeve ① ,
so that the contact fingers are resting exactly on the fixed contact of the disconnector in
CLOSED position.
Fig. 66: Example for correct and incorrect position of the contact fingers
on the fixed contact
➭ Verify proper contact overlapping after several switching operations with the operating
mechanism of the three-position disconnector.
➭ Tighten the locknuts ② again with a tightening torque of 20 Nm.
Busbar housing covers
with desiccant bag
Mounting busbar
housing covers without
desiccant bag holders
For this reason, only the busbar housing covers without a holder for desiccant bags are
mounted first (cover without "Filter" inscription).
➭ Remove the tools.
➭ Clean the inside of the busbar housings with a hand vacuum cleaner with plastic tip.
➭ Clean the bushing plates with a cloth.
➭ Prepare the flanges of the cleaned busbar housings for assembly
(see page 62, "Preparing busbar assembly").
➭ Clean the sealing surfaces of the busbar housing covers with a lint-free paper,
and apply a thin film of grease (see page 62, "Preparing busbar assembly").
➭ Insert the sealing rings in the busbar housing covers.
➭ Put the busbar housing covers on the prepared flanges.
➭ Fasten the busbar housing covers crosswise. Tightening torque: 20 Nm.
WARNING
In the ambient air, the desiccant bags lose their effectiveness rapidly
The formation of condensation can lead to corrosion of switchgear parts.
High air humidity can lead to creepage distances.
➭ If a gas compartment has been open for more than 30 minutes, replace all desiccant bags.
➭ Do not open the packing of the desiccant bags until right before putting them into the
panel.
➭ Use only desiccant bags whose packing is not damaged and whose humidity indicators in
the packing are blue.
➭ If the humidity indicators are pink, do not use the desiccant bags.
➭ If the desiccant bags have been exposed to the air for more than 30 minutes, do not use
the desiccant bags anymore.
➭ After opening the packings, mount the desiccant bags in the gas compartment within
30 minutes.
➭ Close the gas compartment hermetically with sealing rings (O-rings).
➭ Evacuate the gas compartment immediately.
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