Kufotokozera:

mphete ya grading imagwiritsidwanso ntchito pazida zamagetsi apamwamba.Ma mphete amafanana ndi mphete za corona, koma amazungulira zotchingira m'malo mwa ma conductor.Ngakhale atha kuthandizanso kupondereza corona, cholinga chawo chachikulu ndikuchepetsa kutsika komwe kungachitike pachotsekera, kuteteza kuwonongeka kwamagetsi msanga.

Kuthekera kwa gradient (malo amagetsi) kudutsa chotchingira si yunifolomu, koma ndipamwamba kwambiri pamapeto pafupi ndi ma elekitirodi okwera kwambiri.Ngati mphamvu yamagetsi ikwera kwambiri, insulator imasweka ndikukhala oyendetsa pamapeto pake.Kamodzi gawo la insulator pamapeto pake lathyoledwa ndi magetsi ndikukhala conductive, voteji yonse imayikidwa pamtunda wotsalawo, kotero kuti kuwonongeka kumapita patsogolo mofulumira kuchokera kumapeto kwa voteji kupita kumalo ena, ndipo flashover arc idzayamba.Chifukwa chake, ma insulators amatha kuyimilira ma voltages okwera kwambiri ngati gradient yomwe ingathe kumapeto kwa voteji yachepetsedwa.

Mphete yojambulira imazungulira kumapeto kwa insulator pafupi ndi kondakitala wamkulu wamagetsi.Imachepetsa gradient kumapeto, zomwe zimapangitsa kuti ma voltage gradient achuluke kwambiri motsatira insulator, kulola kuti cholumikizira chachifupi, chotsika mtengo chigwiritsidwe ntchito pamagetsi operekedwa.Mphete zowerengera zimachepetsanso ukalamba ndi kuwonongeka kwa insulator yomwe imatha kuchitika kumapeto kwa HV chifukwa champhamvu yamagetsi kumeneko.