pole-mounted transformer; distribution transformer
Technical term used in electrical engineering and utility contexts. Refers to a transformer mounted on a utility pole that steps down voltage for distribution to consumers.
The pole-mounted transformer is installed on top of the utility pole.
In this area, pole-mounted transformers supply electricity to each household.
General term for a transformer; 柱上変圧器 specifically refers to a pole-mounted type.
Another term for distribution transformer, but 柱上変圧器 emphasizes the pole-mounted installation.
Compound of 柱上 (ちゅうじょう, 'on a pole') and 変圧器 (へんあつき, 'transformer').