Components of the thyristor stack
The clamped thyristor assembly consists of six thyristors ② and seven heat sinks ③.
Figure 3-2 Clamped thyristor assembly
The clamped thyristor assembly is pressed together by a set of springs ① with a clamping
screw ④ in such a way as to achieve the required contact force.
Each thyristor is connected with a resistor and a capacitor. The resistor and capacitor have
the following tasks:
● Where there are several thyristors in series, the resistor and capacitor split up the supply
voltage equally.
● If the thyristors are switched off, the resistor and capacitor limit the rate of voltage rise and
voltage overshoot.
Description
3.3 Power unit
SINAMICS GL150 6SL38503UM114PA0Z
Operating Instructions 04/2017 31
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