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 9-9
Releasing screw connections
Maintenance
9.5 Repair
SINAMICS SM150 6SL3815-7NP41-0AA1
Operating Instructions Rev.201910281301 EXAMPLE
167