GOOD PRACTICE IN
TRANSFORMER PARTS STORAGE BASIC INFORMATION
What Are Good Practices
In Storage Of Transformer Parts?
Utility companies have
enormous amounts of money invested in transformers of all types,
including distribution and power transformers. Utilities also have a
long history and have developed methods, procedures, and philosophies
that over time have proven very effective in prolonging equipment
life.
These are collectively
referred to as good utility practices and it is instructive to review
these practices as applied to power transformers. In particular, this
is one of the best practices in storage of transformer parts.
Storage
Bushings, radiators, or
other accessories removed from transformers should be tagged by the
person removing them to identify the transformer from which they are
removed.
Storing Transformers
• Place transformers on
sound footing in a safe or protected area.
• Seal all openings where
accessories have been removed with steel shipping covers.
• Gaskets should be
installed with cover plates.
• All sealed transformers
should be purged and pressurized with dry nitrogen for short term
storage less than 6 months.
• Refer to manufacturer’s
instruction book for specific instructions on storing transformers in
oil or nitrogen.
Storing Bushings
• Bushings should be left
in transformer if possible.
• If removed, store
bushings in a clean, dry place indoors, protected from damage.
Oil-filled bushings can be stored in an open area protected from
weather.
• Preferred storage of
oil-filled bushings is vertical, but oil reservoirs must be elevated
at least 10 in. above bottom bushing stud (or other height specified
in instruction book).
Storing Radiators and Other
Accessories
• All openings on detached
radiators must be sealed from moisture and the radiators stored so
water cannot stand around the sealed openings.
• Protect all accessories
from damage, moisture, and foreign materials.
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