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April 16, 2018

Defining Next Steps of the IEC 61000-4-30 International Standard: Power Quality Measurement Methods

PSL hosts the IEC Technical Committee for the power quality method standard in San Francisco

By Stephane Do, Global Product Manager

On April 4th and 5th Power Standards Lab hosted power quality experts from the IEC Technical Committee 77A / Working Group 9 in San Francisco for an intense two day working session to prepare the future Edition (4) of the IEC 61000-4-30 standard. The mission of the Committee is to maintain (provide clarification, add guidance) and to introduce (add to normative requirement) methods for the measurement of power quality parameters.

The goal of the power quality standard (specifically the Class A category), is to ensure that certified instruments from different manufacturers provide comparable measurement results. Measurement consistency is also important to prove compliance as well as when troubleshooting equipment failure.

The focus of the meeting has been to:

  • Clarify details of the measurement algorithms for detection and characterization of rapid voltage changes (RVC)
  • Discuss options to refine technically the methods for measuring high frequency conducted emissions (2 kHz – 150 kHz frequency band)
  • Explore additional options (better granularity) to measure the frequency of the electrical network mains
  • Introduce technical guidance for measuring high frequency transients (e.g. lightning impulses)
  • Start the specification of measurement methods for power quality for direct current (DC) power supply systems

The Committee members have been assigned to continue working on draft propositions on the above topics which will be reviewed and discussed during the next meeting planned in early 2019.

The publication of the new version of the standard requires documents to be circulated to the National Committees of each participating country for comments. It requires several iterations to produce a final document submitted for voting, and edition 4 is not expected to be submitted for publication before the end of 2019.

Power Standards Lab’s PQube 3 is certified to the most stringent (Class A) of the present edition (edition 3) of this standard.

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