Siemens SINAMICS GL150 Operating Instructions & Installation Instructions page 124

Maintenance
9.7 Repairs
Danger when not complying with the five safety rules
Work must only be performed on adequately grounded power unit. Non-observance of the five
safety rules can cause death or serious injury. Serious material damage can also result.
● Observe the five safety rules.
The thyristors are centered in the stack using their outer diameter and plastic bolts. The plastic
bolts are attached to the heat sinks. A disk spring at the end of the stack provides the necessary
pressure.
Removing a thyristor
①
②
③
④
⑤
Figure 9-8
1. Detach the gate lead from the thyristor electronics.
2. Insert the open-ended wrench
3. Remove the fixing screw
4. Loosen the fixing screws
5. Loosen the two nuts
124
DANGER
M8 fixing screw
2 x M12 fixing screws (on the underside)
M20 nuts for the clamping device
Groove of the guide bolt
A5E00291256 open-ended wrench
Thyristor replacement
③
thyristor assembly.
⑤
into the groove of the guide bolt
①
.
②
on the underside.
evenly, working alternately on each. This releases the heat sink/
④
SINAMICS GL150 6SL38502UM114PA0Z
Operating Instructions Rev.201910281441 EXAMPLE
.