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

GEK-7303 Low Voltage Power Circuit Breakers
I
l STATIONARY "ARCING
I
COOTACT
· I
. 2. P1N (STATIONARY ARCING
I
25
CONTACT) -
-
I
3. lNSULATIOO
I
24
4. ID.ABLE
ARCf'.lG CO'JTACT
4A.STA T. NTERMEDIATE
23
CON'lllCT
5. MOI.AB.E MAN CONTACT
22
6 SHOULDERED PIN
4
7. LNK
21
a PIN (ARCING CONTACT
LINK)
5
20
9. INSULATING LINK
I Q PIN ( INSll.ATING LINK )
IOA. A.OJUSTING PLATE
1 9
II. PIN (SIDE .LINK)
12.CLEVIS
18
13. CLEVIS PIN .
1 4. LOWER STUD
17
15. POLE UNIT BASE
16
16. SPRING (MAIN MOVABLE
CONTACT)
17 . PIN(MOVAEl.E MAIN
COOTACT)
5 -
1a P1N (MOVABLE
CONTACT)
ARCING
4
19 SIDE
LN<
2 Q SPRING (STATIONARY
MAN
CONTACT)
2i. ~ (STATIONARY)
ARCING CONTACT
-
- 22. Uff>ER STUD
2 3. PIN(STATIONARY- MAIN
CONTACT)
24.
STATICNARY
MAl'l
CONTACT
25. TOP COOTACT BLOCK
Fig. 7 (215D174) Pole unit ·assembly - AK-75 and AK-100 .
The . movable arcing contacts (4) should be
replaced when the stationary arcing contacts are
replaced.
. 1. Separate the front frame from the back
frame as described under SEPARATION OF FRONT
AND REAR FRAMES.
2. Remove pins
(8)
and (19) and withdraw
the contacts.
· 12
3. Reassemble parts in reverse order.
Stotio~o ry,lntermediate and Ma in
Conta d1 (Fig. 6) _
.
1.-
Remove stationary arcing ctonacts as de.;.
scribed above.
2. Remove screws (27) and remove bracket
which holds ~in (25) in place •
3. Remove . main-and intermediate-contact .
stop (20A) which h.olds the lower part
of
stationary
contact. Removal
will
be facilitated
if
the force
on the contact springs (21) is neutralized. This
can be accomplished
by
operating the breaker
with the maintenance handle, with the sa!ety· pin ·
in place, until the load on the contact stop is
· relieved. · ·
4. Loosen the hardware -which fastens the
upper stud to the pol e unit base until the contact