ETL 1110-3-412
20 Oct 89
OUTDOOR APPLICATION
The outdoor application of high-fire-point filled
transformers will comply with MIL-HDBK-1008, "Fire Protection For
Facilities Engineering Design and Construction," "National
Electrical Safety Code" (ANSI-C2), and pertinent EPA regulations.
High-fire-point transformers will be sited to preclude any
reasonable chance that products of combustion from a transformer
fire will be drawned into the HVAC air intake of adjacent
building.
(c)
Dry Type Transformer Dielectrics:
INDOOR APPLICATION
Dry type transformers are available in four types:
1.
Open Dry.
2.
Closed Dry.
3.
Sealed Dry (dry nitrogen filled)
4.
Cast Coil (primary and secondary vacuum casted)
Bisphenol Epoxy.
The indoor application of dry type dielectric transformer
will comply with the "National Fire Protection Code," "National
Electrical Code," MIL-HDBK-1008, "Fire Protection For Facilities
Engineering Design and Construction" and the "National Electrical
Safety Code" where applicable.
The open dry type transformer will be installed in a
controlled environment (the environmental air must be filtered
and humidity controlled in a room or vault as required by the
manufacturer)
The sealed or closed dry type transformers will be installed
in a cleaned ventilated room/vault.
The cast coil type transformer will be used in a clean
ventilated environment (room/vault) or routine cleaning will be
required.
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