standard for dry-type power transformers was officially withdrawn and replaced IEC 60076-11 Current Standards Status
IEC 60726 is a standard published by the International Electrotechnical Commission (IEC) that covers dry-type power transformers. The standard provides guidelines for the design, construction, and testing of dry-type transformers, which are used in a wide range of applications, including power distribution systems, industrial applications, and renewable energy systems. iec 60726 dry type power transformers pdf download
Key Replaced By: IEC 60076-11:2004, which is part of the larger "Power Transformers" series. Core Standard Sections Core Standard Sections Key Exclusions : Did not
Key Exclusions: Did not cover instrument transformers, starting transformers, or testing transformers. and testing of dry-type transformers
You're looking for a PDF download of the IEC 60726 standard for dry-type power transformers. Here's some information and a possible solution:
The standard classifies transformers by their resistance to moisture, pollution, and condensation: