Maintenance; Safety Instructions For Maintenance; High Snubber Circuit Capacitor Voltages - Siemens SINAMICS GM150 Operating And Installation Instructions

Maintenance

9.1

Safety instructions for maintenance

9.1.1

High snubber circuit capacitor voltages

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 snubber resistor and the diodes. If the connection to the
capacitor is interrupted, high voltages up to several 1000 V can result and cause an electric
shock. This can result in death, severe injuries and significant material damage.
You must always handle the capacitors as if they are charged.
Discharge the snubber circuit capacitors. Short-circuit the snubber circuit capacitors briefly
before you begin work on the converter.
Observe Chapter, "Safety instructions" when carrying out any work at the converter.
Improper maintenance and repairs
Improper repairs can result in death and serious physical injury.
Only qualified maintenance and installation personnel may perform repairs.
Defective seals
When working on the device, seals at the doors, roof panels as well as front, rear and side
panels can be damaged. Operating the device with defective seals can result in death, serious
injury or material damage.
Replace the defective seals before commissioning. Observe the environmental conditions
stated in the technical data.
SINAMICS GM150 6SL3815-2LN41-4AA2
Operating Instructions 04/2017
WARNING
WARNING
WARNING
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