Pole Unit Assembly - GE AK-2-50 Maintenance Manual

GEK-7303 Low Voltage Power Circuit Breakers
1·· 2
.
.
. . . .
...
..
.
.
:
:;.:
: ·::··:
~--
.
.
.
, ,,
'
.·.
: ··
. ..
.. .
.
.
:
.-:
:
Fig.
4
(8014830) Disassembly of arc quenchers-standard breaker and AKF center pole.
1. Stud
2. Cap
3. Side Barrier
4. Pocket Barrie~
5. Inner Barrier
DISASSEMBL Y~AK AND AKF
CENTER POLE (Fig. 4) -
The following instructions apply
to
both tl1e
Type AK and AKF breaker center poles.
1. Remove arc quenchers (see REPLACE-
MENT).
2. Remove screws holding spacer block (9).
3. Remove spacer block, steel back plate
(8), and compound support (7).
4.
Rock muffler (6) slightly and remove.
The inner barriers (5) can now be removed for
inspection.
5. Remove nut and withdraw stud (1).
6. Remove cap (2). The side (3) and pocket
(4) barriers should be free.
7. Reassemble and replace the arc quencher
in the reverse order. Tighten the fastenings
after replacement.
DISASSEMBLY- AKF OUTER
POLES (Fig. 5)
1. Remove arc quenchers
(8Ce
above) and lay
on sides on a flat surface. ··
2. Remove hardware from one side of arc
quencher as indicated in Fig. 5.
6. Muffler
7. Compound Support
8. Steel Back Plate
9. Spacer Block
3.
Remove bolt fastening cap (4) and barrier
plate assembly.
4. Barrier plates may now be lifted from as-
sembly for inspection.
5.
In
reassembling, make sure · components
are positioned so that holes for self-tapping hard-
ware are in line. Do not strip threads in compound
by overstressing screws.
POLE UN IT A SSEMB LY (Fig. 6 )
NOTE: The text and part identification numbers
contained in this section apply to illustrations
covering the AK-50 breaker. The same text
is· applicable to the AK- 75 and 100 breakers by
referring to Fig. 7 and identifying the similar
parts. These similar parts may not, in every
case, be identified by the same number.
Each pole unit assembly consists of a set of
arcing contacts, a set of mai~ contacts, the
actuating linkage and the mounting base. See
Fig. 8 and 9, pole unit assemblies mounted on
back frame assemblies.
The stationary arcing-contact assembly con- ,
sists of a set of parallel contact fingers (2),
pin (3), and compression springs (22), which
provide continuous contact press ure for the full