Closing Spring And Charging Mechanism; Operating Mechanism - GE AK-2-50 Maintenance Manual

GEK-7303 Low Voltage Power Circuit Breakers
~
FIG ·IIA
· ~C>IANSM
N t.1111:lN" BEFORE
RESETTING AS SHOWN IN. FIG.- I I B
FIG.- 116
~CHANSM
N RES€T POSITlCN
_ 5
6
7
1 .
Pin
Z.. Bushing
3, Bracket
4 . Indicator
5. Bracket
6. Frame
7, Crank Roller
8, Gear Reduc ..
tion Unit
9. Motor
10,
Crank
15
14
1 3
·12_
II
IO
··-
~ -
11,· Paddle
lZ., Closing Cam
Roller
13. Closing Cam
Arm
1'4: Crank Shaft ·
15. Spring Charg-
ing Arm
16. Closing Spring
17, Push Rod
18, Clip
Fig. 10 (541E304) Closing spring
· · and charging mechanism
3. As the crank turns; the roller pushes the
paddle arm upward, there~y chargi~ the closing
springs through the spring charging arm (15)
of the crank shaft.
4. As the . charging roller approaches dead
center a cut-off switch opens, de-energizing the
motor circuit.
2
3
FIG.-IIC
tJE:CHANSM N a..osED POSITl()'.I
(CLOONG SPRf'lG ClSOtARGED)
1.
Spring
z. .•
Cam
3.
Link
4 . Reset Spring
4A,· Spring Adjusting Nuts
5. Prop
6. Adjus.ting Screw
7. Adjusting Screw Stop Pin
8. Prop Return Spring
9. Roller
10. Trip Latch
11. Trip Shaft
lZ.. Clevis Pin
13. Clevis
14. Latch Buffer Stop
(Bronze Material)
15 . Roller
16. Prop
13
~2
()
···--9
- 8
·7
6
5. The breaker is now ready to close when .
a closing signal is given.
Fig. 11 (541E305) Operating mechanism
Closing the
halter
Electrically Operated (Fig. 10)
6. With the breaker resting at the precharge
· position, the trip latch may. or may not
be
in the
reset position. This depends on . the position of
roller (15, Fig. llB) with respect· to the cam
(2, Fig. 11B).
14
1. With
the
mechanism in the position described
·· above and the closing springs charged, applying_
a closing signal
·will
cause the motor
to
continue
to
charge the closing springs allowing the mec~-
anism to reset,
u·
not already resP.t,
to
the posi-
tion shown in Fig. UB.