Siemens 8DA10 Series Installation And Operating Instructions Manual page 148

Installation
Mechanical operation of
switching devices
Electrical operation of
switching devices
Checking interlocks and
indicators
Completing test operation
Activating the
undervoltage release
148/214
➭ All auxiliary and control voltages are switched off.
➭ Charge the circuit-breaker operating mechanism by hand.
➭ Close and open the circuit-breaker.
➭ Close and open the busbar earthing switch several times see page 193, "Operating the
make-proof busbar earthing switch".
➭ Switch on all auxiliary and control voltages. The motor must start up automatically
immediately after, in order to charge the closing spring in the circuit-breaker operating
mechanism.
➭ Close and open the circuit-breaker several times. The motor charges the closing spring
automatically after every closing operation.
➭ Operate all switching devices for test to verify the proper operation of all mechanical and
electromechanical interlocks. Do not use force.
➭ Check correct indication on position indicators at the front of the panels and in the control
room.
➭ Switch the circuit-breakers, disconnectors and earthing switches to OPEN position.
Blocked undervoltage release
Can cause property damage.
The undervoltage release will not function if its retaining bolt is inserted in position A. After test
operation without auxiliary voltage, the undervoltage release must be activated.
➭ Remove the retaining bolt from position A and insert it in position B.
The undervoltage releases mounted in the circuit-breaker must be activated for operation.
The circuit-breaker operating mechanism is located in the central part of the panel behind the
ON/OFF pushbuttons.
➭ Remove the front cover of the circuit-breaker.
➭ To activate the undervoltage release, shift the retaining bolt of the striker from
position A to position B.
➭ Refit the front cover.
✔ The circuit-breaker operating mechanism is now ready for operation with undervoltage
release.
Revision 11 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DA10 • 861-9601.9
①
②
③
NOTICE
Hand crank
"Closing spring not charged"
indication
"Closing spring charged"
indication