Siemens SINAMICS GM150

Preparation
1. Detach the fiber-optic cables for the IGBT power semiconductors on the front and rear of
the PowerCard.
2. Disconnect the auxiliary power supply for the gating boards from the rear.
3. On each IGBT, remove the six screw connections ① between the phase busbars and the
screw connection ② between the phase busbar and the neutral potential.
Figure 9-11 Releasing screw connections
Maintenance
9.7 Repairs
SINAMICS GM150 6SL3815-2LN41-4AA2
Operating Instructions 04/2017 215