See also
Components that can be destroyed by electrostatic discharge (ESD) (Page 17)
9.7.9.3 Replacing a thyristor
You can replace disk-type thyristors within a short space of time using simple tools. The tool set
provided contains the following parts:
● Setting gauge
● Reversible ratchet and socket
● Contact oil Cramolin B
The thyristors are centered in the stack by way of their outer diameter and split rivets. The
expanding rivets are attached to the heat sinks. A disk spring at the top of the stack provides
the necessary pressure.
Note
Selecting replacement thyristors
When replacing a thyristor, observe possible restrictions. Restrictions apply with regard to the
recovery charge Qrr, the on-state voltage U
T
and / or the critical hold-off interval (recovery
time) t
q.
Note
Only use identical thyristor types.
Removing a thyristor
① Setting gauge
② Guide bolt
③ Clamping bolt
④ Reversible ratchet with socket spanner
Figure 9-8 Replacing a thyristor
Maintenance
9.7 Repairs
SINAMICS SL150 6SL38600UL432AA0Z
96 Operating Instructions Rev.201910281433 EXAMPLE
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