Yn ôl gwahanol feini prawf dosbarthu, gellir rhannu trawsnewidyddion pŵer tri cham yn wahanol fathau. According to structural forms, they can be classified as: oil-immersed type, dry type, gas-insulated type, etc. According to their uses, they can be classified as: power transformers, distribution transformers, autotransformers, rectifier transformers, etc. According to the number of phases, they can be classified as: single-phase transformers, three-phase transformers, etc.
