Siemens 3AH3, Operating Instructions Manual

Page: 49 / 64

Operation
9229 9860 176 0E 49
2013-08-22
Operation
Commissioning
Before commissioning, check the following points to ensure that the 3AH3 vacuum
circuit-breaker is functioning faultlessly:
DANGER
High voltage – danger to life
Touching live parts causes an electric shock.
• Do not touch live parts!
• Ensure that the vacuum circuit-breaker is operated only by qualified person-
nel who are familiar with the operating instructions and observe the warning
notices.
• Check through all of the items on the checklist and ensure correct functioning
before commissioning.
Checklist

Notes
Does the information on the rating plate (see page 35) match the order
data?
Ensure correct operating voltage.
If necessary, clean the vacuum circuit-breaker (details on this in section
“Cleaning” on page 53).
Check that screw connections are tightened securely.
Check terminal strip plug-connection for tightness.
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 46)?
Test switching without supply voltage
Charge the closing spring (62.) with the hand crank (50.) (see Fig. 70),
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
and electrically).
Electrically check through auxiliary switch S1 (68.) and position switch
(50.4.1) in both end positions – operate the 3AH3 vacuum circuit-breaker
to do so.
Check functioning of the closing solenoid Y9 (53.1) and all available shunt
releases by operating them electrically.
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