The IEEE has approved a new standard and begun several new standards projects related to power transformers.

The new standard is IEEE C57.12.10, "Standard Requirements for Liquid-Immersed Power Transformers." This voluntary consensus standard sets forth the requirements for outdoor power transformer application. It covers performance, interchangeability, and safety of equipment, and can assist in the proper selection of such equipment.

IEEE also approved a revision to an earlier transformer standard, IEEE C57.12.80, "Standard Terminology for Power and Distribution Transformers."

In addition, IEEE has approved work to begin on two new transformer-related standards. The first, IEEE PC57.13.7, "Standard for Current Transformers with a Maximum mA Secondary Current of 250mA," will provide the performance requirements for electrical system and test interchangeability for current transformers with milliampere output, which are not covered in the base IEEE C57.13 standard.

The second new project, IEEE PC57.13-2008/Cor 1™, will correct a figure in the "IEEE Standard Requirements for Instrument Transformers."

IEEE has also launched revisions to three earlier standards: IEEE PC57.12.28, "Standard for Pad Mounted Equipment - Enclosure Integrity"; IEEE PC57.12.29, "Standard for Pad Mounted Equipment - Enclosure Integrity for Coastal Environments"; and IEEE PC57.136, "Guide for Sound Level Abatement and Determination for Liquid-Immersed Power Transformers and Shunt Reactors Rated Over 500 kVA."