E loketse ho etsa tekanyo ea khanyetso ea insulation (IR), karo-karolelano ea ho monya (DAR), index ea polarization (PI), leakage current (Ix) le absorption capacitance (Cx) ea mefuta eohle ea lisebelisoa tse phahameng tsa motlakase, ho kenyeletsoa switchgear, li-transformer, li-reactors, capacitor, motors, jenereithara le likhoele, joalo-joalo.