TRANSFORMER PARTS STORAGE GOOD PRACTICE BASICS AND TUTORIALS


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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