Siemens 3AH37, Operating Instructions Manual, Page: 51 / 64

Operation
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2013-07-08
Operation
Commissioning
Before commissioning, check the following points to ensure that the 3AH37/38
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
personnel 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 34) match the ordering
data?
Ensure correct operating voltage.
If necessary, clean the vacuum circuit-breaker (details on this in section
“Cleaning” on page 55).
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
transport securing device from the undervoltage release” on page 47)?
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
For test switching with motor, switch on the supply voltage. The motor
starts up immediately and charges the closing spring (62.). Check
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 3AH37/38 vacuum
circuit-breaker to do so.
Check functioning of the closing solenoid Y9 (53.1) and all available shunt
releases by operating them electrically.