Abstract：The environmental aspects in the three stages of designing and producing，running， disposal of the end·life of Resin Cast Dry—type Transformers are analyzed．Conclude that this kind of transform er fulfill the standard of HBC2 1．． The Certifiable Technical Requirement for Envkonmental Labeling Products Dry—type Power Tran sform ers． Far more discussion and illus~afion on the recyclingan dhan dfingtechnologyofthe end—lifetran sform ersaregiveninthis article．
This paper analyses some technical problems on dry - type transformer and the correlative problems on developing dry - type transformer , such as the relation between current dencity selection and insulation endurance class , the relation between average temperature rise and heat - spot temperature rise of winding , the
relation of self - cooling capacity and forced - air cooling capacity , selection of HV winding connection and the problem of resistance to lower temperature. A new temperature rise test method which will adopted is introduced.
Keyword：dry-type transformer epoxy resin casting Dry - type transformer Insulation endurance class Temperature rise
