Technical professional association IEEE, US, has announced that the IEEE Standards Association (IEEE-SA) Standards Board has approved two projects for the revision of standards for evaluating and reconditioning transformers.
The first is IEEE PC57.12.34 - Standard for Requirements for Pad-Mounted, Compartmental Type, Self Cooled, Three Phase Distribution Transformers, 10 MVA and Smaller; High Voltage, 34.5kV Nominal System Voltage and Below; and Low Voltage, 15kV Nominal System Voltage and Below. When completed, the standard will address certain electrical, dimensional and mechanical characteristics and safety features of transformers that are generally used for step-down or step-up purposes from an underground primary cable supply. It covers the connector, bushing and terminal arrangements for radial or loop-feed systems, as well as certain critical dimensions for these items necessary for proper safety and operational considerations. The standard's scope is being revised to account for the increasing size of step-up and step-down transformers in distribution systems.
The second is IEEE PC57.140 - Guide for Evaluation and Reconditioning of Liquid Immersed Power Transformers. This starndard will review and update a comprehensive document intended to aid users in selecting the proper approaches to upgrading, reconditioning, refurbishing or other activities in extending the useful life of transformers. Guidelines are provided for insulating oil maintenance and diagnostics, oil reclamation, testing methods for the determination of remaining insulation (paper) life and upgrades of auxiliary equipment such as bushings, gauges, de-energized tap changers, load tap changers where applicable and coil "reclamping."
The IEEE Standards Association seeks to develop consensus standards through an open process that engages industry and brings together a broad stakeholder community. IEEE standards set specifications and best practices based on current scientific and technological knowledge. The IEEE-SA has a portfolio of over 900 active standards and more than 500 standards under development. For more information see the IEEE-SA website.
Search for more Industry codes and standards
To access our daily STM news feed through your iPhone, iPad, or other smartphones, please visit www.myscoope.com for a mobile friendly reading experience.
