To remove a thyristor, proceed as follows:
1. Withdraw the gate lead from the thyristor electronics.
2. Insert the setting gauge ① in the groove of the guide bolt ② on the stack section in which
the thyristor is being replaced.
3. Release the clamping bolt ③ using the reversible ratchet with socket spanner ④.
In this way you release the heat sink / thyristor assembly. The heat sinks and thyristors move
downwards until the heat sinks and thyristors are held at a defined position by holding bolts.
Note
The stack is fully released when the lowest heat sink is held by the holding bolt.
4. Remove the thyristor with the gate lead facing forwards.
The holding bolts and the distances traveled are matched to each other so that you can
easily remove the thyristor from the clamped assembly after releasing the clamping bolt.
Installation
NOTICE
Injury when using an unsuitable tool
Using unsuitable tools can result in injury and/or equipment damage.
The spring stays preloaded by the setting gage.
● Always use the correct tools.
To install a thyristor, proceed as follows:
① Expanding rivets ③ Gate lead
② Thyristor ④ Thyristor electronics
Figure 9-9 Heat sink with thyristor
Maintenance
9.7 Repairs
SINAMICS SL150 6SL38600UL432AA0Z
Operating Instructions Rev.201910281433 EXAMPLE 97
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