Incazelo:

Iringi yokugreda iphinde isetshenziswe emishinini yamandla kagesi aphezulu.Amaringi okugreda ayafana namaringi e-corona, kodwa ahaqa izivikeli ngaphezu kwamakhondakta.Nakuba zingase futhi zisebenze ukucindezela i-corona, inhloso yazo enkulu ukunciphisa ukuthambeka okungaba khona eduze kwesivikelo, ukuvimbela ukuphuka kukagesi ngaphambi kwesikhathi.

Igradient engaba khona (inkambu kagesi) kuyo yonke into eyisivikelo ayifani, kodwa iphakeme kakhulu ekugcineni eduze kwe-electrode ephezulu kagesi.Uma ingaphansi kwe-voltage ephezulu ngokwanele, isivikelo sizophuka bese sisebenza ngaleso sikhathi kuqala.Uma ingxenye ye-insulator ekugcineni iphukile ngogesi futhi iba yi-conductive, i-voltage egcwele isetshenziswa kulo lonke ubude obusele, ngakho-ke ukuhlukana kuzothuthuka ngokushesha ukusuka ekugcineni kwe-voltage ephezulu kuya komunye, futhi i-flashover arc izoqala.Ngakho-ke, ama-insulators angama ama-voltage aphezulu kakhulu uma i-gradient engaba khona ekugcineni kwe-voltage ephezulu incishisiwe.

Iringi yokugreda izungeza isiphetho se-insulator eduze kwe-conductor yamandla aphezulu.Yehlisa i-gradient ekugcineni, okuholela ekukhuphukeni kwe-voltage kakhudlwana eduze kwesivikelo, ivumele isivikelo esifushane, esishibhe ukuthi sisetshenziselwe ugesi othile.Izindandatho zokugreda ziphinde zehlise ukuguga kanye nokuwohloka kwe-insulator okungenzeka ekugcineni kwe-HV ngenxa yenkundla ephakeme kagesi lapho.