Siemens SINAMICS SM150

The position of the grounding switch lever is linked with the check-back signal for the status
of the "Opened" power system breaker and the threshold value (V<Vlimit).
WARNING
High voltages
High voltages can cause death or serious injury if safety rules are not observed or if equipment
is handled improperly.
Even when the door interlocking is released, dangerous high voltages can still be present at
the auxiliary circuits (fans, anti-condensation heating, closed-loop control, etc.).
Make sure that work is only carried out by qualified personnel under due observance of the
five safety rules, the warning information in these operating instructions, and the safety
information on the product itself.
WARNING
Not activated door lock
If the door locking mechanism is not activated during operation, then the drive can be
grounded live and cause a short-circuit in the DC link. A DC-link short-circuit can result in
death, serious injury, or material damage.
Remove the grounding bar before the voltage is switched on. This then activates the
mechanical interlocking system, guaranteeing safe drive operation.
9.3.2 Manually unlocking power unit doors
If the auxiliary voltage fails, you can only unlock the doors manually. To unlock the doors,
proceed as described in the chapter titled "Preparation for use".
See also
Opening doors in preparation for use (Page 93)
Maintenance
9.3 Opening the doors
SINAMICS SM150 6SL3845-7NN46-7AA0
Operating Instructions 04/2017 161