I-vacuum yegumbi lokucisha i-arc kufanele ihlolwe njalo lapho isebenza, indlela yile: vula i-Switch, sebenzisa i-voltage yamandla e-42kV ekuqhekekeni kwayo okuvulekile, uma iqhubeka.
ukubonakala kwezehlakalo ezikhanyayo, igumbi lokucisha i-arc kufanele lithathelwe indawo elisha.