変へん圧あつ器き

• 可か変へん変へん圧あつ器き

  variable transformer

• 柱ちゅう上じょう変へん圧あつ器き

  pole-mounted transformer; distribution transformer

• 絶ぜつ縁えん変へん圧あつ器き

  isolation transformer

• 逓てい降こう変へん圧あつ器き

  step-down transformer

• 降こう圧あつ変へん圧あつ器き

  step-down transformer

Compound of 変 (hen, 'change') + 圧 (atsu, 'pressure/voltage') + 器 (ki, 'device'). The term is a direct calque of English 'transformer'.