RECONDITIONING
74 OI 248 (EN) REV6 /REV6
The adsorption filter in each pole column that is opened must be re-
placed.
10.1 Reconditioning the Interrupter Chamber
10.1.1 Disconnecting the Interrupter Chamber from the Post Insulator
For this procedure, the pole column must be in the closed position.
• Draw off the SF
6
gas using a service unit, and evacuate and
ventilate the breaker.
• Fasten the lifting tackle to the pole column using two M16
eyebolts. Use the two middle holes in the terminal pad mounting
plate for this purpose.
• Install the slow operation device in the operating mechanism and
slowly move the mechanism to the closed position (see “Slow
Operation for Maintenance Purposes” on Page 127).
• Loosen and remove eight screws (26) on the upper flange of the
post insulator.
• Carefully lift the interrupter chamber 60-80 mm. This will result in
a gap (G) between the interrupter chamber and the upper flange
of the post insulator.
• Remove the splint pin (25) using tool T114.
• Remove the coupling pin (24) using tool T115.
• Lift off the interrupter chamber and fasten in to a suitable fixture
with four M16 screws. Use the holes in the lower high voltage
terminal pads for this purpose.
The period during which the gas compartments are open should
be kept to a minimum.
The ingress of water (rain) must be prevented at all times.
- After electrical operations, SF
6
may contain noxious or toxic
substances and is a greenhouse gas.
- Therefore never discharge SF
6
to the atmosphere.
- Draw off the SF
6
gas into a gas cylinder using a service unit
and send it to reprocessing.
Do not reach into this gap (G) with your hand.
Therefore:
- Always use a tool to remove the coupling pin connection.
Lifing the interrupter chamber more than 80 mm may damage
the components.
Therefore:
- Do not lift the interrupter chamber more than 80 mm.
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