Igbt Replacing - Kemppi KEMPACT PULSE 3000 Service Manual

IGBT replacement
IGBT mounting onto the heat sink
The installation surfaces must be clean, even very small particles (0,050mm) between the surfaces
increase the gap between heat sink and module, causing module overheating and possibly destruction.
Heat transfer paste is spread as an even layer about 0,1 mm thick, onto the modules base plate.
The module is immediately attached to the heat sink, in order to avoid any dirt to get between the
components.
At first all M5 screws are tightened carefully to torque of 0,5...2 Nm, after which the module can
be tightened to the nominal torque of 3 Nm.
After a few minutes the screw torques are checked again to be 3 Nm.
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