Intambo eboshiwe kathathu noma intambo evalekile eqinisiwe eyenziwe izendlalelo ezintathu, ivala ngokuphelele okuyisisekelo kusukela kwesibili kwe-transformer.Ukufakwa okuqinisiwe kunikeza izindinganiso ezihlukene zokuphepha ezisusa izithiyo, amateyipu ama-inter layers namashubhu okuvikela ku-transformer.
Inzuzo enkulu ye-wire insulated kathathu ayiyona nje kuphela i-voltage yokuwohloka ephakeme efika ku-17KV, kodwa Ngaphezu kokunciphisa usayizi nomnotho ezindlekweni ezibonakalayo zokukhiqiza i-transformer.