The role of the energy storage part of the box transformer

How long can a power transformer be stored?

Medium and large power transformers and reactors can typically be stored for up to 6 months following dismantling for transport after test. For longer storage periods, there is a risk of loss of liquid impregnation from the solid insulation which may adversely affect its dielectric strength.

Where do power transformers and reactors need to be stored?

Power transformers and reactors may need to be stored to accommodate constraints in manufacturing, transport, or installation. This storage may take place at the factory, the installation site, or alternative storage facilities. In some cases, transformers and...

Should a transformer be fully assembled during storage?

There are advantages to fully assembling the transformer or reactor during storage for a spare in long-term storage. Firstly, it preserves the condition of components which might otherwise become contaminated or deteriorate if stored separately, e.g., bushings and coolers.

Should a transformer be stored in a CIGRE manual?

CIGRE working group A2.34 gave some guidance on storage of spare components and materials, but not complete transformers (CIGRE brochure 445 2011 ). They also recommended that the operation and maintenance manual for transformers should include storage instructions.

Do Transformers corrode when stored in a corrosive atmosphere?

To preserve the paint finish and to avoid excessive corrosion during storage, it is important that transformers or reactors are not stored for a prolonged period in a more corrosive atmosphere than that specified. Any damage to the paintwork during transport should be made good before storage.

When should a transformer or reactor be stored in a liquid containment area?

It may also be applicable where it is necessary to extend short-term storage of transformers or reactors, which are transported, drained of liquid, and filled with dry gas. The transformer or reactor must be stored in a suitable liquid containment area.