... a 2000 kva, 27.6 kv/480 v, epoxy-cast coil power transformer having a ... rated 300/5 amperes for sensing, is furnished on the entrance bay of the indoor assembly. ...
www.sandc.com/pdfs/600/621_853.pdf

... features a 480/208 V step down transformer and panel board. The A2 power assembly is not outdoor rated and will be provided with indoor assembly and interim ...
www.ligo.caltech.edu/docs/E/E980022-C.pdf

... These are the transformer room, the blower room, and the emergency generator ... Proceed immediately to the Indoor Assembly Area (HFBR Lobby Conference Room) and ...
www.bnl.gov/hfbr/Docs/HASP4.htm

It appears like this in Google and Systran glossaries

This is the most used expression. Here are some examples in the context of electricity and transformers:

Multi station, mains powered controllers.
... You will require a 240 Volt electrical outlet to plug in the 24 Volt transformer. ... irrigation
system controller unit for internal and external installation, ...
www.garden-irrigation.co.uk/acces3.htm

Electrical sealing glands
... by Hydro-Pac to conduct instrument signals and electrical power into high ... Instrument-Wire Glands are available for either internal or external installation. ...
www.hydropac.com/HTML/sealing-glands.html

Güngör Elektrik : Completed Projects : Distribution Networks ]
... INSTALLATION OF 1 DISTRUBITION SUBSTATION, INTERNAL INSTALLATION OF 13 TRANSFORMER SUBSTATIONS , AND ... ll, SECTOR 330ha LV +MV ELECTRICAL DISTRIBUTION NETWORK, ...
www.gungorelektrik.com.tr/eng/biten_isler/ dagitim_tesisleri.htm

Types Construction Stnd / Prices
... Bathrooms: Completely furnished, functioning and tiled (no marble),
One, One. Electrical Internal Installation, Included, Included. Low ...
www.crete-homes.com/arch/constrsys.html

A few instances of "indoor installation" follow:

Electric Service Manual
... Single-phase, Three-wire Indoor Installation (over 320 amps, not over 1200 amps).
620. 120/240 Volt, Single-phase, Three-wire Current Transformer Wiring Diagram ...
www.cinergycge.com/Business_Services/service_request/ electric_service_manual/default.asp - 40k - 9 Sep 2003 - Cached - Similar pages

KTPBR-35/10(6) modular transformer substations - RZVA
... Development of 35 kV switchgear for indoor installation reflects modern trend of
the modular transformer substation construction, namely of the closed-type ...
www.rzva.com.ua/english/products/substation/ktpbr35/ - 32k - Cached - Similar pages

Knowing liquid-filled transformer installation requirements.
... type and location of a transformer in a design, the requirement to have a transformer
vault plays a key role in the cost and safety of an indoor installation. ...
www.ecmweb.com/ar/electric_knowing_liquidfilled_transformer... - 74k - Cached - Similar pages

Transformer Sales
... Designed for indoor installation in hotels, schools, factories and industrial
and commercial ... neutral on the secondary side of the main power transformer. ...
www.jfrost.com/pow-tech/Sales/transformers.htm - 16k - Cached - Similar pages

[PDF]Tornado Stainless
File Format: PDF/Adobe Acrobat - View as HTML
... 12-volt integral or external transformer options are available on request where ... making
them the ideal choice for safe and cool running indoor installation. ...
www.tornado.co.uk/pdf/ground_lights.pdf - Similar pages

DSC Home Systems Product Lines
... HS-XFRM120. CEBus Pathway Transformer. Powers HS-HC8000 Automation Controller;
For indoor installation and use; Input : 120VAC, 60Hz, 12 Watts; ...
www.dscsec.com/productscebus3.htm - 17k - Cached - Similar pages

3 Phase Isolation Transformer for AC & DC Fields
... Isolation Transformer defined: A transformer which isolates the primary circuit from
the secondary circuit. Designed for indoor installation in hotels, schools ...
www.microcontechnologies.com/ 3_phase_isolation%20Transformer.htm - 17k - Cached - Similar pages

REgards,

AG