Post insulator e lautele faʻaaogaina i le maualalo i le maualuga voltage system, mo eseese talosaga, o loʻo i ai laina post insulator ma nofoaga post insulator.
Line post insulator o loʻo faʻapipiʻi luga o le pou eletise mo le laina faʻasalalau. E tusa ai ma le faʻaaogaina ma le tulaga na faʻapipiʻiina ai luga o le pou, o le laina post insulator ua vaevaeina i ni ituaiga: Faʻamau o Top Line Post Insulator, Faʻavaʻa ma Vertical Line Post Insulator, I lalo o Arm Line Post Insulator ma Clamp Top Line Post insulator.
Faʻatonutonu post pou iniseti insulated ma faʻavae lagolago mo malosiaga laʻau, faʻasalalauina ma tufatufaina pou, ma isi paoa eletise e oʻo atu i le 1100kV.
Post insulator mafai ona faia i poselane ma silicone polymer. Ua mamanuina mo maketi eseese ma gaosia i tulaga masani, ina ia latou mafai ona faʻamalieina eletise ma masini manaʻomia o le IEC, ANSI faʻavae poʻo le auiliili faʻamatalaga.