Operation
70
9229 0025 176 0E
2021-11-15
Position indicator and spring state indicator when charging the closing
spring, closing and opening
* Spring only charged if motor voltage is applied
Fig. 111 Control element indicators
First closing operation
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.
Operation of the vacuum circuit-breaker in the switchgear is only permitted with the
cover fitted and secured.
If all functions have been checked and are OK, switch on the high voltage while ob-
serving all of the safety regulations and operational requirements.
Closing
Provided there is no lock-out due to a mechanical interlock, send the closing com-
mand via the CLOSE pushbutton or the corresponding control unit until the vacuum
circuit-breaker is closed, and shows and signals the CLOSED switch position.
Change to the position indicator:
After closing and, if necessary, releasing the CLOSE pushbutton, the closing spring
is immediately automatically charged by the motor and the symbol for “Closing
spring charged” becomes visible in the spring state indicator.
Change to the spring state indicator:
Opening
The opening spring is charged during the closing operation.
To open, send the opening command via the OPEN pushbutton or the correspond-
ing control unit until the vacuum circuit-breaker is open, and shows and signals the
OPEN switch position.
Input
Position indicator
Spring state indicator
Charging
with hand crank,
with motor operat-
ing mechanism
Closing
CLOSE pushbut-
ton
Remote operation
*
Opening
OPEN pushbutton
Remote operation
OPEN
CLOSE
Charged
Discharged
Charged
