IEEE 28-1957

28-1957 is the AIEE American Standards document for lightning arresters used on alternating current power circuits. It addresses the technical expectations for devices intended to limit overvoltage stress and protect power equipment from lightning-related surges. As a superseded standard, it remains useful for identifying historical design and compliance references in older power-system documentation, procurement records, and equipment archives where arrester requirements must be interpreted carefully.

About 28-1957

This standard focuses on lightning arresters for AC power circuits, placing it within the core area of power, energy, and industrial electrical systems. It typically relates to construction, performance, and application considerations for surge-protection devices used on energized circuits. The document helps define a common technical basis for evaluating arrester suitability, especially where insulation coordination and protection of electrical components are important. For users reviewing legacy specifications, 28-1957 can serve as a reference point for historical engineering practice.

Where is 28-1957 used?

28-1957 is most relevant in alternating current power installations where lightning arresters were used to protect conductors, transformers, switchgear, and related electrical apparatus. It may appear in utility distribution and transmission records, substation documentation, and industrial power-system specifications. The standard is also useful when assessing older equipment lists or maintenance files that reference arrester requirements for legacy installations. In these settings, it supports interpretation of component selection and system protection expectations.

Importance in practice

In practice, 28-1957 matters because surge-protection equipment must perform predictably under fault and lightning conditions. A clear technical standard supports consistent design review, procurement, and testing of arresters used on AC circuits. It also helps engineers compare historical equipment against documented requirements, reducing ambiguity when maintaining or replacing older components. For organizations managing legacy electrical assets, the standard can help improve safety, preserve system reliability, and support more consistent engineering decisions.

• Lightning arresters for AC power circuits
• Historical AIEE standards reference
• Legacy surge-protection documentation
• Power-system insulation coordination