Replacing The Snubber Circuit Capacitor; Replacing The Compactflash Card - Siemens SINAMICS GL150 Operating Instructions & Installation Instructions

9.7.2

Replacing the snubber circuit capacitor

Electric shock hazard
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when the thyristor electronics are withdrawn.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
Use heat-stabilized cable ties for fixing the capacitors in place. Tighten the capacitor terminals
with the following torques.
Table 9-2
Nuts
M8
M12
9.7.3

Replacing the CompactFlash card

To replace the CompactFlash card, proceed as follows:
1. Ensure that the Control Unit is de-energized.
2. Withdraw the CompactFlash card from the Control Unit. Back up the data saved on it.
SINAMICS GL150 6SL38502UM114PA0Z
Operating Instructions Rev.201910281441 EXAMPLE
WARNING
before you withdraw the thyristor electronics.
Torques of the capacitor connections
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.
Tightening torque
5 Nm
10 Nm
Maintenance
9.7 Repairs
117