IEC International Electrotechnical Commission:
http://www.electropedia.org/iev/iev.nsf/display?openform&iev...
substation relay building
substation relay kiosk
a small building or cabinet close to the bay switchgear and controlgear, where protection and automatic equipment relating to this bay is located

http://stonito.com/eword/list.php?lang=EN&char=S&category=40...
123.
substation relay building.
substation relay kiosk, a small building or cabinet close to the bay switchgear and controlgear, where protection and automatic equipment relating to this bay is located

relejna kućica u stanici
---
Bez obzira na visoku pouzdanost navedenog izvora (IEC) ja bih se ipak odlučila za "relay building".