IEEE 262-1968

262-1968 is a superseded English standard for distribution, power, and regulating transformers, as well as shunt reactors. It sets out a technical test code for equipment used in power and energy applications, helping define how performance is assessed and compared. For engineers, purchasers, and test personnel, this document provides a structured reference for evaluating transformer and reactor behavior in service-relevant conditions, supporting more consistent design review, procurement, and acceptance practices.

262-1968 overview

This standard addresses the testing framework for distribution transformers, power transformers, regulating transformers, and shunt reactors. As a test code, 262-1968 is intended to guide how these devices are examined so results are more uniform and technically comparable. Its context is electrical power equipment where ratings, insulation behavior, and operating performance need careful verification. The document is especially relevant when technical requirements must be tied to repeatable test methods rather than general design descriptions.

Typical use cases

262-1968 is commonly used when specifying or reviewing tests for transformers and shunt reactors in utility and industrial power systems. It may support procurement of distribution or regulating transformers, factory acceptance work, and engineering checks for equipment intended for power network operation. The standard is also useful when comparing test results across similar components, particularly where consistent assessment of electrical performance, insulation integrity, and operating characteristics is needed for project documentation or technical review.

Why this standard matters

For equipment in power systems, a clear test code helps reduce uncertainty during design approval, supplier evaluation, and commissioning. 262-1968 matters because it supports consistent testing expectations for transformer and reactor equipment, which can improve comparability and lower the risk of mismatched requirements. It also helps teams document compliance in a more disciplined way, making it easier to verify performance, manage quality control, and support safe integration into distribution and transmission-related applications.

• Distribution, power, and regulating transformers
• Shunt reactor test procedures
• Performance and rating verification
• Insulation and electrical assessment
• Factory and acceptance testing support