Fixing bolts have to be uniformly tightened with the specified mounting torque. Cross sections of busbars or cables have to be dimensioned so that heating up the powerblock will be avoided. This applies in particular for series connected fuses. Powerblocks are maintenance-free. The assembly group should, however, be cleaned from time to time to ensure the insulation capability, the heat dissipation and thus the availability of the power converter.
Beryllium oxide is used in the powerblock assembly for insulation.
Do not destroy the powerblock case because the beryllium oxide dust resulting from such action is hazardous if inhaled.