I-12kV 630A iswitshi yomthwalo eneendawo ezine egcwele ioyile yenzelwe ikhabhinethi yokutshintsha iringi ye-US-box eyilelwe ukuhlangabezana nemigangatho ye-IEEE, i-IEC kunye ne-GB yazo zonke iimfuno. Ingasetyenziswa kwiinkqubo ezisekelwe phantsi komhlaba okanye ezingaphantsi komhlaba.

Iswitshi yomthwalo eneendawo ezine efakwe kwioyile ekufakelweni, kufutshane nesiseko setransformer inokunciphisa uqhagamshelo lwangaphakathi. I-capacitance yekhebula, ngaloo ndlela inciphise kakhulu iluphu kwi-resonance ye-ferromagnetic. Zombini ii-mounting ezisemacaleni kunye nee-top mounting ziyafumaneka kwi-transformer yebhokisi yaseMelika eqhelekileyo okanye i-transformer efihliweyo.