Official source, often indicates it is replaced by IEC 60076-11. iTeh Standards (EN IEC 60076-11:2018) Provides the updated 2018 standard. SIS (Swedish Institute for Standards) Lists the withdrawn IEC 60726. Summary of Changes (IEC 60726 to IEC 60076-11)
: Many universities and research centers maintain subscriptions to standards databases through platforms like Intertek Inform, Techstreet, or IHS Markit
The IEC Webstore still lists the withdrawn document for archival purchase.
For those reviewing historical or existing equipment built to this standard, it is divided into the following primary sections: Definitions and application limits. Rating: Standard power and voltage ratings. iec 60726 dry type power transformers pdf download
: IEC 60726 was the original international standard dedicated specifically to dry-type power transformers. It outlined the manufacturing, performance, and testing requirements for these units.
IEC 60726 laid the essential groundwork for modern dry-type transformer standards. While it is no longer active, its legacy continues through the series. For current projects, you should refer to IEC 60076-11:2018 .
The current and most up-to-date version is , published on August 15, 2018. This second edition introduced several major technical revisions compared to the 2004 version: Official source, often indicates it is replaced by
(and later updated by the 2018 edition). While legacy documents referencing IEC 60726 may still exist, current industry standards require compliance with the IEC 60076-11 series for design, rating, and testing of dry-type power transformers up to 72.5 kV. Svenska institutet för standarder, SIS Key Information on IEC 60726 & Replacements Withdrawn and superseded by IEC 60076-11. Scope (Original IEC 60726):
: Originally covered dry-type power transformers (including auto-transformers) with a highest voltage for equipment up to and including 36 kV.
However, free online downloads of the PDF from unauthorised file‑sharing websites are and are strongly discouraged. Such files may be incomplete, out of date, incorrectly formatted or even contain malware. Summary of Changes (IEC 60726 to IEC 60076-11)
The is the comprehensive collection of standards covering power transformers, with Part 11 dedicated specifically to dry-type transformers. The first edition of IEC 60076-11 (2004) maintained compatibility with IEC 60726 while introducing updated technical requirements aligned with contemporary industry practices.
The transformer is suitable for operation at ambient temperatures down to -5°C. It can be stored and transported down to -25°C.
Dry-type power transformers, also known as cast resin transformers or dry-type transformers, are electrical transformers that use a non-liquid dielectric material, such as epoxy resin or polyurethane, to insulate the windings. Unlike oil-filled transformers, dry-type transformers do not require a liquid coolant, making them ideal for applications where oil is not permitted or where fire safety is a concern.
Frequent condensation or heavy pollution (common in coastal or heavy industrial zones). Climatic Classes (C)
IEC 60726 was officially withdrawn on May 27, 2004, and replaced by (Power transformers - Part 11: Dry-type transformers). This transition marked a significant evolution in how dry-type transformers were standardized internationally.