IPA: /ˈsʌbˌsteɪʃən/
KK: /sʌbˌsteɪʃən/
A place where electricity is transformed and distributed, or a smaller branch of a larger organization, like a post office.
The new substation will help improve the electricity supply in the area.
Substation → It is formed from "sub-" (meaning under or below) and "station" (from Latin "stare", meaning to stand). The word refers to a facility that stands under or supports the main power system, acting as a secondary station for electricity distribution.
Think of a place that stands 'under' ('sub-') the main power system, which helps distribute electricity — that's what a substation does.