Siemens 8BT2 Installation And Operating Instructions Manual page 81

Manually spring charging of the circuit breaker
Preconditions • Truck completely inserted and interlocked in panel
881-4027.9 * INSTALLATION AND OPERATING INSTRUCTIONS 8BT2 * Revision 04
NOTE!
Depending on the electrical logic, the circuit breaker can be electrically operated from the
remote via SCADA connection
Circuit breaker
Switch disconnector
Voltage transformer with truck in the metering panel
Fig89. Actuating hole for manual charging of the circuit breaker spring
If the control voltage fails, the closing spring for operating the circuit breaker is no longer
charged automatically. To operate the circuit breaker in spite of this, the closing spring must be
charged manually with the hand crank.
DANGER!
Risk of injury by sudden rotation of hand crank. If you use a hand crank without a
freewheel to charge the spring, the hand crank will rotate when the control voltage is
switched on again (motor starts up) and can lead to injury.
Use special hand crank with freewheel from the accessories!
Turn cover of operating shaft (pos.nr.
in fig89 located over it.
)
Push hand crank onto operating shaft.
Turn hand crank clockwise approx. 25 turns until the "spring charged" indication appears
in the inspection window.
Remove hand crank.
The spring is latched automatically. The energy required for the operating sequence
OPEN-CLOSED-OPEN (auto reclosing) is stored in the spring.
in fig89 aside using the rotary button (pos.nr.
)
81