I-GDJW-40B ingasetshenziselwa ukuhlola ama-voltage wokusabalalisa we-insulator emisiwe ekhokhisiwe noma ukutholwa kwaselabhorethri yesivikelo esimisiwe, futhi inike amandla ukuhlonza inkinga yangaphakathi efihlekile yesivikelo, ukuthuthukisa ukuthembeka kokusebenza kohlelo lwegridi yamandla, futhi kuthuthukiswe. ukusebenza kahle kwabasebenzi bomugqa abenza ukuhlola bukhoma.