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Closing; Opening - Siemens 3AK Operating Instructions Manual

Vacuum circuit-breaker module.
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2013-09-09
The adapter (50.6) of the hand crank (50.) is designed in such a way that the hand
crank becomes uncoupled when the motor supply voltage returns.

Closing

Provided there is no lock-out due to a mechanical locking device, send the closing
command via the CLOSE pushbutton (53.) or the corresponding command element
until the vacuum circuit-breaker module is closed and shows and signals the
CLOSED position.
Change of the position indicator (59.):
OPEN
After switching on and possibly releasing the CLOSE pushbutton (53.), the closing
spring (62.) is immediately automatically charged by the motor and the indicator
"Closing spring charged" (55.) becomes visible.
Change of the spring state indicator (55.):
Charged
Note
If an undervoltage release 3AX1103... is fitted, it must be connected to the control
voltage for switching operations (mechanical or electrical), as otherwise closing
is not possible.

Opening

The opening spring (64) is charged during the closing operation.
To open, send the opening command via the OPEN pushbutton (54.) or the corre-
sponding command element until the vacuum circuit-breaker module is open and
shows and signals the OPEN switching position.
Change of the position indicator (59.) after electrical opening:
CLOSED
The spring state indicator (55.) does not change.
Discharging the closing spring
To discharge the closing spring:
the supply voltage must be deactivated
the vacuum circuit-breaker module must be closed manually (see "Closing" on
page 45) and then
opened manually (see "Opening" on page 45).
The spring state indicator (55.) does not change.
CLOSED
Discharged
OPEN
Operation
Charged
45

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