Uma kukhulunywa ngokusatshalaliswa kwamandla, ukukhetha kwekhebula kubalulekile ukuqinisekisa ukusebenza nokuphepha. I-8.7 / 15 kV cores kathathu ikhebula lamandla le-aluminium lenzelwe izicelo zamandla aphakathi nendawo, okwenza kube ukukhetha okuthandwayo phakathi kukagesi nonjiniyela. Ukuqonda izici nezinzuzo zalolu hlobo lwekhebula kungakusiza ukwenza izinqumo ezinolwazi ngemisebenzi yakho.