Auxiliary Switch - Standard Breaker; Auxiliary Switch Linkage - Akf Breakers - GE AK-2-50 Maintenance Manual

GEK-7303 Low Voltage Power Circuit Breakers
1.
Mounting Bolt
2. Tie Bolt
3. Shaft
- 2
4. Screw
I
5. Bottom Cover
6. End Plate
3
7.
Top Cover
8. 'a' Contacts
9.
10.
Contact Spring
Rocker Arm .
4
11.
Pin
12. Cam
· 5
13.
_ 'b'
Contacts
14.
'b'
Terminals
15. 'a' Terminals -
16. Bar.rier
8
- -7
10
II
12
13
- 6
,--- - - JS
, h ·+- r- - 1 5
- - - 14
Fig. 19 (242C588) Auxiliary switch - standard breaker
2
3
I.PIN
- 2.SW ITCH MOUNTING BOLT
3.AUXILIARY SWITCH SHAF T
4. CROSSBAR .
5. OPERATING ROD
6. LINK
7.
BOLT
8.L INK
9.LOCK NUT
10. L I NK
II. TRIANGULAR LINK
12.
LINK
Fig. 20 (0133C9019) Auxiliary switch linkage --AKF breakers
2.
Remove two mounting bolts.
· · breaker with the maintenance handle, with the safety .
3. Diseng~e auxiliary sw~tch shaft (8) from the pin restraining the closing springs, and with a bell
triangular link (6). · set across the "a" terminals of the auxiliary switch.
4.
Set arrow on new auxiliary switch shaft.
- . 5. Push auxiliary switch shaft (8) into square
hole in link (breaker open). _ ·
6. Replace mounting hardware and wiring.
Adjustment
(Fig. 18) ·
The "a" contacts of the auxiliary switch should
close before the arcing contacts of the breaker
close. This may be checked by slowly closing the
The closing of the . "a" . contacts
can
be
ad-
vanced or retarded by extending or ·reducing
the external length of the operating rod (5).
The length of the operating rod
(5)
should be ad-
justed so that the switch '. ' a" contacts close wh.en
the arcing contacts are parted by 1/8 to 1/4
m.
The operating rod should also be aligned vertically
so that it is parallel with the sides of the breaker
frame center channel and J?erpendicular .with the
crossbar (4). This alignment may be secured by re-
locating the washers on the pin which connects
· the operating rod to the crossbar.