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50.0
55.0
50.0
Hand crank
50.1
Manual-spring charging port
53.0
Manual close button
54.0
Manual open (trip) button
55.0
CHARGED/DISCHARGED indicator
Figure 16: Use of manual-spring operation crank
22
50.1
53.0
54.0
When the closing spring has been fully
charged, the crank actuates the linkage (55.1)
via control lever (55.2) for the closing-spring
CHARGED indicator (55.0), and actuates the
limit switches (50.4.1) for interrupting the
motor supply.
At the same time, the lever (62.5) at the
other end of the charging shaft is securely
locked by the close-latch pawl (62.5.2).
When the closing spring is being charged,
cam disc (62.3) follows along, and it is
brought into position for closing when the
closing spring is fully charged.
Closing
Refer to Figure 15: Stored-energy operating
mechanism on page 20 and Figure 16: Use of
manual-spring operating crank on page 22.
If the circuit breaker is to be closed locally, the
closing spring is released by pressing the
close button (53.0). In the case of electrical
control, the spring-release coil 52SRC (53.1)
unlatches the closing spring.
As the closing spring discharges, the charging
shaft is turned by crank (62.2). The cam disc
(62.3) at the other end of the charging shaft
actuates the drive lever (62.6), with the result
that the jack shaft (63.0) is turned by lever
(63.5) via the coupling rod (62.8).
At the same time, the levers (63.1), (63.5)
and (63.7) fixed on the jack shaft operate the
three-insulated couplers for the circuit
breaker poles.
Lever (63.7) changes the OPEN/CLOSED
indicator (58) to CLOSED. Lever (63.5)
charges the tripping spring (64) during
closing, and the circuit breaker is latched in
the CLOSED position by lever (64.3) with pawl
roller (64.3.1) and by pawl (64.2). Lever
(63.1) actuates the auxiliary switch through
the linkage (68.1).
The crank (62.2) on the charging shaft moves
the linkage (55.1) by acting on the control
lever (55.2). The closing-spring CHARGED
indication (55.0) is thus canceled and, the
limit switches (50.4.1) switch in the control
supply to cause the closing spring to recharge
immediately.
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