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IEEE C62.41.2-2025

IEEE Recommended Practice on Characterization of Surges in Low-Voltage (1000 V and Less) AC Power Circuits
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IEEE C62.41.2-2025

IEEE Recommended Practice on Characterization of Surges in Low-Voltage (1000 V and Less) AC Power Circuits

PUBLISH DATE 2026
PAGES 50
IEEE C62.41.2-2025

Revision Standard - Active.

The surge environment at locations on ac power circuits described in IEEE Std C62.41.1™ is characterized in this recommended practice by means of standardized waveforms and other stress parameters.

The surges considered in this recommended practice do not exceed one half-cycle of the normal mains waveform (fundamental frequency) in duration.

They can be periodic or random events and can appear in any combination of line, neutral, or grounding conductors.

They include surges with amplitudes, durations, or rates of change sufficient to cause equipment damage or operational upset.

While surge protective devices (SPDs) acting primarily on the amplitude of the voltage or current are often applied to divert the damaging surges, the upsetting surges might require other remedies.

The scope of this recommended practice is to characterize the surge environment at locations on ac power circuits described in IEEE Std C62.41.1 by means of standardized waveforms and other stress parameters.

The surges considered in this recommended practice do not exceed one half-cycle of the normal mains waveform (fundamental frequency) in duration. They can be periodic or random events and can appear in any combination of line, neutral, or grounding conductors.

They include surges with amplitudes, durations, or rates of change sufficient to cause equipment damage or operational upset (see Figure 1).

While surge protective devices (SPDs), acting primarily on the amplitude of the voltage or current, are often applied to divert the damaging surges, the upsetting surges might require other remedies.

The purpose of this recommended practice is to offer to equipment designers and users a set of standard and additional surge-testing waveforms and stress levels derived from the surge environment described in the companion guide IEEE Std C62.41.1.

This recommended practice is only the basis for making an informed decision, made possible by a simplification of a complex database. This simplification will then allow consistent, repeatable, and cost-effective specification of surge performance for equipment connected to low-voltage ac power circuits.

The selection and specification of which waveform and what stress level should be considered for specific equipment remain the prerogative and responsibility of designers and users.

SDO IEEE: Institute of Electrical and Electronics Engineers
Document Number C62.41.2
Publication Date July 14, 2026
Language en - English
Page Count 50
Revision Level
Supercedes
Committee Surge Protective Devices Committee
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