IEC 61000-4-30 Ed. 4.0:2025 Electromagnetic Compatibility (EMC) — Part 4-30: Testing and Measurement Techniques — Power Quality Measurement Methods
Buy IEC 61000-4-30 Ed. 4.0:2025 for current power quality measurement methods. Essential IEC standard for utilities, engineers, test labs, instrument manufacturers, and compliance professionals workin
About this publication
The IEC 61000-4-30 Ed. 4.0:2025 standard is a core technical reference for power quality engineers, utility specialists, electrical consultants, test laboratories, instrument manufacturers, compliance teams, and facility engineers who need current, internationally recognized methods for power quality measurement. The IEC states that this edition defines the methods for measurement and interpretation of results for power quality parameters in AC power supply systems with a declared fundamental frequency of 50 Hz or 60 Hz.
This is not a general EMC overview. It is the dedicated IEC measurement-method standard used to make power quality results reliable, repeatable, and comparable, regardless of the instrument implementation. The IEC explains that the document addresses in-situ measurements and covers two classes of measurement methods: Class A and Class S, with Class A standing for advanced and Class S standing for surveys.
A major strength of IEC 61000-4-30:2025 is its practical breadth. The IEC says the document covers conducted phenomena in power systems and addresses measurement of power frequency, supply voltage magnitude, flicker, voltage dips and swells, interruptions, transient voltages, voltage unbalance, harmonics and interharmonics, rapid voltage changes, mains communicating system voltages, current magnitude, harmonic currents, interharmonic currents, and current unbalance. It also covers emissions in the 2 kHz to 150 kHz range through Annexes C and D. That broad scope is exactly why this standard matters so much for real-world power quality work.
This fourth edition is especially important because it is a technical revision of the previous edition. The IEC states that it cancels and replaces the third edition published in 2015 and incorporates IEC 61000-4-30:2015/AMD1:2021 and IEC 61000-4-30:2015/COR1:2016. It also updates and extends the measurement methods for rapid voltage changes and voltage events, splits Annex C into two parts, adds a new measurement method for conducted emissions in the 9 kHz to 150 kHz range, and removes the prior annexes for underdeviation/overdeviation parameters and Class B.
For serious technical buyers, that makes this title more than a passive library standard. It is a working reference for power quality analyzer design, field measurement programs, utility studies, industrial troubleshooting, compliance review, and laboratory test alignment. The IEC also notes that compliance-verification test methods for this document can be found in IEC 62586-2, which reinforces its role inside a larger measurement and instrument-validation framework.
Even though the official IEC listing shows 95 pages for the English edition, this is still a high-value, highly technical standard. Its value comes from the importance of the measurement rules it sets, not from page count alone. For many buyers, IEC 61000-4-30 is one of the most important power quality standards to own because it helps define how measurements should be made and interpreted when consistency actually matters.
Why This Standard Matters
The IEC 61000-4-30 Ed. 4.0:2025 standard is a must-have reference for professionals who need current IEC guidance for power quality measurement methods. It is especially well suited for:
Power quality engineers and analysts
Utilities and grid-monitoring teams
Electrical consultants and facility engineers
Test laboratories and compliance specialists
Power quality instrument manufacturers
EMC, energy, and electrical standards libraries
Product Features
Official IEC 61000-4-30:2025 International Standard.
Edition 4.0.
Focused on power quality measurement methods for AC power systems.
Covers in-situ measurements for systems with a declared fundamental frequency of 50 Hz or 60 Hz.
Includes Class A and Class S measurement methods.
Addresses voltage, current, harmonics, interharmonics, flicker, dips, swells, interruptions, transients, rapid voltage changes, and more.
Includes major technical updates over the 2015 edition and its amendment/corrigendum.
Product Details
Title: IEC 61000-4-30 Ed. 4.0:2025 Electromagnetic compatibility (EMC) — Part 4-30: Testing and measurement techniques — Power quality measurement methods
Publisher: International Electrotechnical Commission
Edition: 4.0
Publication Date: October 24, 2025
ISBN: 9782832707838