9.7.3 Replacing the phase module
In the power unit, the power semiconductor modules (IGCT), gating boards and balancing
resistors are arranged on phase modules. A power unit comprises three phase modules. The
IGCT phase module is a replaceable unit. Its weight is 260 kg. The entire IGCT phase module
must be withdrawn from the drive so that it can be repaired.
Required tools
● A suitable, flat cooling water catchment tray with a capacity of at least seven liters for
draining the drive
● Open-ended spanner (16 mm, 18 mm, 22 mm)
● Socket spanner set
Prerequisite
Prepare the changing device as described in Section "Attaching the changing device to the
stacker (Page 171)".
Preparation
1. Remove the electrical connections from the lifting solenoids ③.
2. Loosen the screws connecting the central brace with the frame of the cabinet, and remove
the central brace.
Figure 9-10 Lifting solenoid
Maintenance
9.7 Repairs
SINAMICS SM150 6SL3845-7NN46-7AA0
Operating Instructions 04/2017 173
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