The lifespan of a dry-type transformer can be prolonged to as much as 25 years, provided the required services and maintenance is carried out in accordance with manufacturer specifications.
|Type of Transformer||Type of Inspection and Frequency (months)|
|Visual||Visual and Mechanical||Visual, Mechanical and Electrical|
|Dry type (rated power up to 1250kVA)||2||12||36|
|Dry type (rated power above||1||2||24|