Ko ngā VCB he wāhanga matua nui o ngā pūnaha hiko hōu e tiaki ana, e whakahaere ana i ngā whatunga tukatuka hiko. Mā te hokohoko whakamutu kaukau e kīia nei ko te vacuum interrupter mechanism, he pai tana whakamātau me ōna āhuatanga whakamarumaru mātātoko, nō reira e taea ai te whakamahi ki waho. Āhua noa i te ao, e mahi ana ngā VCB o tātou, e mau tonu ana i ngā takotoranga āhuarangi katoa. Neke atu i te 30 tau, ko te auahitanga me te kounga tēnei kaupapa matua mō tātou, ēnei ngā pou e tu ana ai mātou hei kaihangarua e whakapono ana ki a ia. Nō reira ka whai mātou kia tutuki, kia anuanu hoki i ngā tautohe o ō mātou kiritaki me te tauwhitinga irirangi.