Kemppi KM 300 Service Manual

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Kemppi KM 300 Service Manual Manual pdf 36 page image

IGBT replacingMounting the IGBT to the heat sinkThe tools and premises used in this work must be clean and free of dirt and dust. Even verysmall particles (0,050mm) between the surfaces may increase the gap between heatsink andmodule, causing overheating ans possible damage.Heat transfer compound is to be spread in even layer of approximately 0,1 mm onto the modulebase. Then the module should be immediately mounted on the heatsink, in order to minimizethe possibility of dirt getting between the components.Firts, all the M5 type screws are tightened 0,5...2 NM. After a few minutes the module can betightened into the torque of 3 NM.36

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