Does the information on the rating plate (see page 27) match the order
Ensure correct operating voltage.
If necessary, clean the vacuum circuit-breaker module (details on this in
section "Cleaning" on page 47).
Check that screw connections are tightened securely.
Check functioning of the auxiliary switches.
If necessary, check and adjust customer's devices.
If there is an undervoltage release (Y7) 3AX1103 : has the locking screw
of the striker been shifted from position A to B (see "Removing the trans-
port securing device from the undervoltage release" on page 39)?
Test switching without supply voltage
Charge the closing spring (62.) with the hand crank (50.) (see Fig. 51),
then actuate the CLOSE pushbutton (53.) and, once closing has been
performed, actuate OPEN pushbutton (54.).
Test switching with supply voltage
To perform test switching with the motor, switch on the supply voltage.
The motor starts up immediately and charges the closing spring (62.).
Check the indicator for charge state of the closing spring (mechanically
Electrically check through auxiliary switch S1 (68.) and position switch
(50.4.1) in both end positions – operate the 3AK vacuum circuit-breaker
module to do so.
Check functioning of the closing solenoid Y9 (53.1) and all available shunt
releases by operating them electrically.
9229 9923 176 0B
High voltage – danger to life
Touching live parts causes an electric shock.
Do not touch live parts!
Ensure that the vacuum circuit-breaker module is operated only by qualified
personnel who are familiar with the operating instructions and observe the
Check through all of the items on the checklist and ensure correct functioning
Before commissioning, check the following points to ensure that the 3AK vacuum
circuit-breaker module is functioning faultlessly: