New EMC Standards as Redline versions

Latest editions of International Standards for Electromagnetic compatibility (EMC) published.

By Morand Fachot

Two important International Standards for EMC have been published as Redline versions. One concerns testing and measurement, the second one, prepared by CIS/F, a Subcommittee of the International special committee on radio interference (CISPR), sets out EMC requirements for household appliances, electric tools and similar apparatus.

RF anechoic-chamber
Radio frequency (RF) anechoic chambers are used to test and measure equipement EMC

Measuring and testing

Measuring and testing equipment for EMC is essential to determine if equipment is fit to be deployed and if so, in which conditions.

IEC 61000-4-30:2015, Electromagnetic compatibility (EMC) – Part 4-30: Testing and measurement techniques – Power quality measurement methods, is the latest Standard in the IEC 61000-4 series.

IEC 61000 is published in seven separate parts, with IEC 61400-4, which includes over six dozen publications, covering testing and measurement techniques.

It has been prepared by IEC Subcommittee (SC) 77A: EMC – Low-frequency phenomena, of IEC Technical Committee (TC) 77: Electromagnetic compatibility.

Technical revision

IEC 61000-4-30:2015, the third edition of this Standard, constitutes a technical revision.

It gives normative references, details terms and definitions and general information regarding classes, organization of measurements and requirements. It describes power quality parameters, such as power frequency, magnitude of the supply voltage, flicker, supply voltage dips and swells, voltage interruptions.

It includes the following significant technical changes with respect to the previous edition:

  • the measurement method for current, previously informative, is now normative with some changes
  • the measurement method for rapid voltage change (RVC) has been added;
  • the measurement method for conducted emissions in the 2 kHz to 150 kHz range has been added in informative Annex C;
  • underdeviation and overdeviation parameters are moved to informative Annex D;
  • Class A and Class S measurement methods are defined and clarified, while Class B is moved to informative Annex E and considered for future removal;
  • measurement methods continue in this standard, but responsibility for influence quantities, performance, and test procedures are transferred to IEC 62586-2, Power quality measurement in power supply systemsPart 2: Functional tests and uncertainty requirements.

Household appliances, electric tools and more

CISPR 14-2:2015, Electromagnetic compatibility – Requirements for household appliances, electric tools and similar apparatus – Part 2: Immunity – Product family standard, is aimed at establishing uniform requirements for the electromagnetic immunity of the equipment mentioned, to fix test specifications of immunity, to refer to basic standards for methods of testing, and to standardize operating conditions, performance criteria and interpretation of results. CISPR 14-2 has been prepared by CIS/F: Interference relating to household appliances tools, lighting equipment and similar apparatus.

The standard lists the categories of products covered, with specific requirements formulated for each category, which include:

  • Category I: apparatus containing no electronic control circuitry
  • Category II: transformer toys, dual supply toys, mains-powered motor-operated appliances, tools, heating appliances and similar electric apparatus
  • Category III: includes apparatus provided with rechargeable batteries, solar or other similar d.c. power sources which can be charged or operated by connecting the apparatus to the mains power
  • Category IV: all other apparatus covered by the scope of this standard

This standard, which includes significant technical changes with respect to the previous edition, also details the requirements and parameters for each type of test, performance criteria, the applicability of immunity tests for the different categories of apparatus, conditions during testing, and conditions for the assessment of conformity.

Standards available as Redline version

Given the extent of changes in these new editions, these International Standards are also available as Redline versions with track changes.

Redline versions (available in English only) provide users with a quick and easy way of comparing all the changes between standards and their previous edition, as such they are highly valued. In Redline version, a vertical bar appears in the margin wherever a change has been made. Additions and deletions are displayed in red, with deletions being struck through. First introduced in 2008, Redline versions are now available for 36 International Standards.

RF anechoic-chamber Radio frequency (RF) anechoic chambers are used to test and measure equipement EMC
Dyson vacuum cleaner Modern appliances like this vacuum cleaner no longer cause interference thanks to CISPR standards (Photo: Dyson)
Remote controlled car CIS/F EMC standards concern electric toys, like this remote-controlled car (Photo: Maisto)