Vim yog cov electrostatic adsorption ntawm DC kab, cov pa phem theem ntawm DC kab yog siab dua li ntawm AC kab nyob rau hauv tib yam kev mob, thiab tus naj npawb ntawm insulators yuav tsum tau kuj ntau tshaj li ntawm AC kab. Cov txheej txheem rwb thaiv tsev feem ntau yog txiav txim siab los ntawm cov pa phem tawm ntawm cov hlua insulator. Yog li ntawd, muaj ob txoj hauv kev tseem ceeb thaum xaiv tus naj npawb ntawm cov insulators:
1. Raws li kev ntsuas cov pa phem ntawm cov khoom siv hluav taws xob, cov txheej txheem insulator pollution tolerance yog siv los ntsuas cov pa phem flashover voltage ntawm insulators nyob rau hauv qhov sib txawv ntsev densities, thiaj li txiav txim seb tus naj npawb ntawm insulators.
2. Raws li kev ua haujlwm dhau los, txoj kev taug kev deb tau txais yuav. Feem ntau, qhov kev ncua deb ntawm DC kab yog ob zaug ntawm AC kab. Ntawm ob txoj hauv kev, tus qub yog intuitive, tab sis yuav tsum muaj ntau qhov kev sim thiab cov ntaub ntawv xeem, thiab cov txiaj ntsig ntawm kev sim thiab kev sim yog tawg heev. Cov tom kawg yog qhov yooj yim thiab yooj yim rau kev siv, tab sis tsawg dua. Hauv kev xyaum, feem ntau yog kev sib xyaw ua ke ntawm ob