IEEE 28A-1950

28A-1950 is a technical standard for valve and expulsion type lightning arresters, presented as the AIEE Report on Standard for these protective devices. It addresses the engineering context of power, energy, and industrial applications where surge protection and insulation coordination are important. For equipment exposed to lightning or switching surges, this document helps define a common basis for design and evaluation. The 28A-1950 standard is relevant to installations that need consistent arrester performance and dependable electrical protection.

About 28A-1950

The purpose of 28A-1950 is to describe standardization for valve and expulsion type lightning arresters, which were used to limit overvoltage stress on electrical systems. As an AIEE report, it sits in the historical technical framework of power-system apparatus and protective components. The document is likely useful for understanding the intended characteristics, terminology, and engineering expectations for these arrester types. For buyers and technical reviewers, 28A-1950 provides a focused reference tied to arrester design and protective practice.

Where is 28A-1950 used?

This standard is most relevant in power-system and industrial electrical environments where lightning arresters are selected to protect lines, equipment, and connected devices from surge events. It may be used in utility distribution work, substation equipment planning, and older power-installation documentation where valve or expulsion type arresters were common. The subject area also suggests value in component-level engineering, where protective devices must be matched to system voltage, insulation level, and operating conditions.

Importance in practice

In practice, 28A-1950 matters because arrester performance affects system reliability, equipment survival, and maintenance planning. A clear standard helps engineers and procurement teams compare protective devices on a common technical basis rather than relying on inconsistent descriptions. It can also support testing and specification work by giving a defined reference for arrester type and expected behavior. For legacy systems, using 28A-1950 can improve consistency when reviewing compatibility, replacement options, or historical design records.

• Valve and expulsion type lightning arresters
• Surge protection for power systems
• Industrial and utility electrical equipment
• Design and compliance reference
• Historical AIEE technical context