861-9601.9 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DA10 • Revision 11
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Installation
Filling the busbar run
with SF
6
gas
➭ Determine the filling pressure required according to the rating plate (see page 39, "Rating
plates") and the data given in Section "Insulating gas SF
6
" (see page 35, "Insulating gas").
The pressure depends on the gas temperature.
➭ Connect the SF
6
gas cylinder to the gas filling valve of the evacuated busbar run.
➭ Fill SF
6
into the busbar run until the necessary pressure is reached. Check the filling pressure
on the pressure indicator of the busbar run and on the pressure indicator of the gas filling
equipment.
➭ Remove the connecting tube of the gas cylinder from the gas filling valve. The gas filling
valve closes automatically.
➭ Refit the locking cap of the gas filling valve.
➭ In the case of non-compensated manometers for circuit-breaker housings: Adjust the limit
pressures on the pressure indicators (signaling contacts) in the manometer with the
supplied square socket spanner (see page 35, "Insulating gas").
Completing the assembly
of further busbar runs and
filling with SF
6
gas
➭ Fill all other busbar runs as described above (see page 95, "Completing busbar assembly and
filling with SF
6
gas").
22.2
Installing the panel connections supplied in the accessories, and filling
the circuit-breaker housing with SF
6
gas
To install panel connections that are supplied separately, the circuit-breaker housing is not
filled with SF
6
gas at the factory.
To expose the desiccant bags as briefly as possible to the ambient air, the following assembly
operations are performed
completely for one circuit-breaker housing on one panel each
.
Assembling panel
connections supplied
separately
➭ Remove 4 cheese head bolts M6 and 4 conical spring washers from the cover of the
transformer housing ① .
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.
CAUTION
Risk of property damage
Components may be damaged during disassembly.
➭ Do not reuse cheese head bolts, conical spring washers, toroidal sealing rings and nuts.
➭ Dispose of disassembled components in an environmentally compatible way.