Siemens SINAMICS GL150 - Maintenance; Safety Instructions for Maintenance

9.6.4 Replacing the snubber circuit capacitor
WARNING
High snubber circuit capacitor voltages
The snubber circuit capacitors are not equipped with discharge resistors. The energy stored
in the capacitors is discharged via a circuit in the thyristor electronics. This circuit is interrupted
when the thyristor electronics are withdrawn.
Voltages of up to several 1000 V can occur and cause an electric shock. This can result in
death, severe injuries and significant material damage.
In this case you should always handle the capacitors as if they were charged.
Discharge the snubber circuit capacitors. Short-circuit the snubber circuit capacitors before
you withdraw the thyristor electronics.
Use the available threaded clamps for fixing the capacitors in place. Tighten the capacitor
terminals with the following torques.
Table 9-4 Torques of the capacitor connections
Nuts Tightening torque
M10 7 Nm
M12 10 Nm
9.6.5 Replacing the CompactFlash card
To replace the CompactFlash card, proceed as follows:
1. Ensure that the Control Unit is de-energized.
NOTICE
Destruction of the CompactFlash card
The CompactFlash card must only be inserted or removed when the power is off.
Otherwise there is a risk of data loss or damage to the card, which would prevent
commissioning of the drive.
Only remove or insert the CompactFlash card when the power is switched off.
2. Withdraw the CompactFlash card from the Control Unit. Back up the data saved on it.
Maintenance
9.6 Repairs
SINAMICS GL150 6SL38503UM114PA0Z
Operating Instructions 04/2017 121