I-12kV 630A iswishi yomthwalo enezindawo ezine egcwele uwoyela yenzelwe ikhabhinethi yokushintsha indandatho ye-US-box yohlobo lwendandatho eyenzelwe ukuhlangabezana nezindinganiso ze-IEEE, IEC kanye ne-GB zazo zonke izidingo. Ingasetshenziswa ezinhlelweni ezisekelwe phansi noma ezingaphansi komhlaba.

Iswishi yomthwalo enezikhundla ezine ecwiliswe uwoyela ekufakweni, eduze ne-core ye-transformer inganciphisa uxhumano lwangaphakathi. Amandla ekhebula, ngaleyo ndlela inciphise kakhulu i-loop ku-resonance ye-ferromagnetic. Kokubili ukufakwa ohlangothini kanye nokufakwa phezulu kuyatholakala. Ku-transformer yebhokisi yaseMelika ejwayelekile noma i-transformer efihliwe.