1) Multi-phase pfupi dunhu mukati me transformer. 2) Turn-to-turn pfupi dunhu, mhepo uye iron core kana shell short circuit. 3) Iron core kukundikana. 4) Pachave kana kubuda kwemafuta pasi pemafuta. 5) Iyo pombi inoshandura iri mukubata kwakashata kana waya welding haina kusimba.