A cikin duniya na injiniyar jari, **insulator** suna da matsayi mai muhimmanci wajen ** ƙarfafa tsarewa da ƙarfi na jari**. A tsakanin waɗannan, ** 24 kV aikin matsayi a matsayi** ya bayyana saboda a kansu. An ƙarfafa su musamman don a sarrafan ayyuka mai tsanani sa’ad da suke ba da aiki na musamman a cikin yanayi dabam dabam