This　paper　proposes　a　non-contact　measurement　technique　for　the　voltage　of　three-phase　cables.　The　technique　initially　constructs　an　optimized　analytical　calculation　model　for　the　electric　field　distribution　of　three-phase　cables.　Subsequently,　by　combining　measured　electric　field　data　from　an　array-type　capacitive　sensor　and　utilizing　the　potential　coefficient　matrix　obtained　through　physical　calculations,　it　enables　precise　determination　of　the　voltages　on　the　three-phase　conductors.　The　maximum　error　does　not　exceed　3.3%.　©　2025　IEEE.