- Undo the four fCl;tening bolts of the crank case.
- Lift the pole columns, transport to the workshop and mount them
on an assembling trestle in upright position.
b) Change of the ard ng contacts
- . Loosen the expan~ion bolts at the fixed contact
(1.1)
and proceed
as described in ,:hapter 6.2.
!
- Lift the fixed ccntact up~ards out of chamber porcelain, place it
on a dry pad, c
11
~an the surfaces and remove any adheri ng decom-
pos it i on product:;.
- Replace the fixE!d arcing contact
(1.1.02).
- Undo the bolts of the upper flange of the support porcelain
(1.6)
(see figure
81,
item
8).
- Lift the chamber porcelain, place it on a dry pad and clean the
inner surfaces f"om any decomposition products.
- .Uncoup1e the COII[P 1ete interrupter uni t (1. 3) by 1ooseni ng the
locking pin
(1.8.02)
(see figure
81,
item 0). Use the assembling
tool mentioned ill table 85.
Pullout the comf1lete interrupter unit (for disassembl ing of the
complete pole columns proceed as described in chapter 3.9.3).
- Mnunt a new interrupter unit in the lower support for cont?ft
(~5) and couph
W;;.ri
a locking pin. Use the assemL:ihg
~JHl
mentioned in tab e 85.
.
-
- Mount the chamber porcelain, fasten the bolts and tighten with
83 Nm.--
When mounting the fixed contact on the chamber porcelain, the
contact has to be positioned with respect to the interrupter unit.
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