Storage; Installation - HPS DH Serie Guía De Instalación, Operación Y Mantenimiento

Storage

WARNING
Failure to follow storage requirements can result
in death or serious injury, and property damage.

Installation

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION OR
ARC FLASH
Failure to follow these Installation instructions and all
applicable local and national codes when installing
and connecting a transformer will result in death or
serious injury and/ or substantial property damage.
be immediately communicated to the local HPS sales office.
If the examination of the unit takes place outdoors,
caution should be exercised to protect the unit against factors
that may present further hazard.
Transformers that will not be immediately installed and
energized, should be stored in a clean dry environment away
from any environmental airborne contaminants. Transformers
should be stored in such a way not to represent any type of
hazard. Stacking transformers one on top of another without
proper shelving is not permitted.
It is recommended that transformers be stored in a
heated building with uniform temperature and adequate
air circulation to prevent condensation with the protective
plastic wrap still installed for long term storage. If storage in a
heated building is not possible, transformers must be properly
protected from contaminants and moisture preferably in a
non heated building. We recommend that electric heating
be installed inside the transformer to maintain a uniform
temperature above the ambient and to prevent condensation.
In extreme cases they may be stored in temperatures no lower
than -40°C (-40°F). Special care should be given to prevent
the formation of condensation inside the stored transformers.
Units that are to be energized after being stored at a low
temperature or after being stored for a long time must be
warmed to -25°C (-13°F) with warm air or radiant heat. Once
the unit reaches this temperature and its free of condensation
and any other contaminants resulting from the storage process,
it is safe to be energized.
Enclosures are designed and approved
in accordance with specifications CSA 22.2 No. 47
(General Purpose), CSA 22.2 No. 94 (Specialty Enclosures),
NEMA 250 and UL 50.
For IEC enclosure equivalents please see IEC 60529
(Enclosure Classifications Designations).
a) Enclosed Indoor/Outdoor Dry-Type Transformers
Most dry-type transformers are supplied with either a
type 3R, 4 or 12 enclosure. Units may be installed indoors, or
outdoors where applicable. If equipped with a type 1 enclosure,
these units are for indoor use only.
Ventilated enclosures are recommended for indoor
installation but may also be installed outdoors based on the
rating of the enclosure and the recommendations of the
Consulting Engineer overseeing the project.
For any outdoor location, the appropriate applicable
codes must be followed including cable installation and
hardware suitable for outdoor service. Before outdoor
installations, verify that adequate site drainage exists to prevent
groundwater from entering the transformers.
Water tight couplings are strongly recommended to be
installed at the knockouts or any other holes drilled any holes
5
IOMGDDI / September 2017