Dry-type transformer kutonhora nzira dzakakamurwa kuita echisikigo mweya kutonhora (AN) uye yekumanikidza kutonhora kwemhepo (AF). Kana yakasikwa mhepo-yakatonhorera, iyo yakaoma transformer inogona kushanda nguva dzose kwenguva yakareba pachiyero chakayerwa. Kana kutonhora kwemhepo kunomanikidzirwa, iyo inobuda simba ye transformer yakaoma inogona kuwedzerwa ne50%. Inokodzera kupindirana kwekuremedza oparesheni, kana njodzi yekuremerwa kwenjodzi; nekuda kwekuwedzera kukuru kwekurasikirwa kwemutoro uye impedance voltage panguva yekuremerwa, iri munzvimbo isiri yehupfumi, saka haifanirwe kushandiswa kwenguva yakareba inoramba ichiremedza kushanda. Ichi zvakare chikonzero nei yakaoma mhando transformers inonyanya kufarirwa pamusika wetransformer.