IEEE 644-1979
IEEE Recommended Practices for Measurement of Power Frequency Electric and Magnetic Fields from AC Power Lines
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About This Item
IEEE 644-1979 is a standard for measuring power frequency electric and magnetic fields from AC power lines, giving engineers a common basis for evaluating field levels around energized transmission and distribution systems. It is relevant where electromagnetic fields, power-line geometry, and measurement consistency affect analysis or reporting. By defining a repeatable approach, IEEE 644-1979 helps support comparable results in power, energy, and electromagnetic applications.
About IEEE 644-1979
This technical document focuses on recommended practices for field measurement at power frequency, which is typically associated with AC power systems rather than higher-frequency radio applications. IEEE 644-1979 is intended to guide how electric and magnetic field data are obtained so the results can be interpreted consistently across similar line configurations and operating conditions. For organizations working with AC power lines, it provides a practical reference for measurement method selection, field characterization, and documentation.
Where is IEEE 644-1979 used?
IEEE 644-1979 is commonly used in work involving overhead AC power lines, transmission corridor studies, and substation-adjacent field assessments. It may support engineering teams that measure environmental fields, compare line configurations, or review exposure-related data tied to power-frequency electromagnetic effects. The standard is also useful in testing and planning workflows where consistent measurement practice is needed for line studies, system evaluation, or technical reporting in electric power settings.
Importance in practice
In practice, IEEE 644-1979 matters because field measurements can vary significantly if methods are not controlled. A recognized approach improves consistency between teams, helps reduce ambiguity in design reviews, and supports more reliable comparisons between sites or operating conditions. For compliance-related work, procurement, or engineering validation, IEEE 644-1979 can help ensure that power-frequency electric and magnetic field data are gathered and reported in a repeatable, technically defensible way.
- Power frequency electric field measurement
- Power frequency magnetic field measurement
- AC power line applications
- Repeatable field-testing practice
- Technical reporting and comparison
- Publication Date: 1979
- Standard Status: Superseded
- Publisher: IEEE
- Subject: Power, Energy and Industry Applications; Components, Circuits, Devices and Systems; Fields, Waves and Electromagnetics
- Official IEEE: Doi link
- New Version Available: 644 (2020)
- Previous Version: 644 (1994)
- Previous Version: 644 (1987)
- This Version: 644 (1979)
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