Opinion regarding article on the influences of disturbances by electrical converters (including LED and energy saving lamps)

The metering industry is legally regulated by the European MID (Measuring Instruments Directive) and published guidelines of the WELMEC organization. In order to create a harmonious and consistent basis for European measurement, the WELMEC organization is supported by various working groups. This includes members from legal authorities, market monitoring authorities, notified bodies, industry, European commissions and consumer organizations to involve all relevant stakeholders.

The TR50579 standard supported by various stakeholders and in line with the EU EMC directive 2004/108/EC was introduced in 2010 to cover the aspects of EMC influences on metering equipment. The issue was raised by SWEDAC (Swedish Board for Accreditation and Conformity Assessment) in front of the European Commission. These definitions are also considered in the new IEC standard 61000-4-19:2014.

 

The immunity of Iskraemeco meters against frequency disturbances in the frequency range 2 - 150 kHz and, in particular, against the mentioned light sources CFL (Compact Fluorescent Lamp) and LED (Light-Emitting Diode), has been tested successfully by independent test laboratories based on TR50579 and IEC 61000-4-19 standards.

 

Due to the increasing amount of devices imported in the EU, which create disturbances above the regulated levels and do not comply with European directives, the European parliament and the council of the European Union release NLF (New Legislative Framework) in 2008. This NLF introduced 3 major elements (Regulation No 764/2008, No 765/2008, No 768/2008/EC) to better regulate the market access. As a consequence, all economic operators (importers, dealers) are subject to legal obligations by making a product available on the market. This provide a market surveillance facilitation with the possibility to track back non-compliant products up to the manufacturer. The majority of the directives impacted by this NLF have been put in force in 2014 and are applicable from 2016 onward.

 

The test setup used in the Twente University study, represents extremely specific conditions to simultaneously expose multiple metering devices to a large number of dimmed load sources on a single phase, which may not be seen as realistic operational conditions.

 

Additionally, this Active In-Feed Converter applications e.g. dimmable light sources are known for causing electromagnetic interference and some of them are not compliant to the EU EMC directive so that the detected inaccuracies are possible.

 

Iskraemeco is aware that new technologies can introduce new type of disturbances. As a front runner in the metering industry, we pay particular attention to design new products to not only comply, but to improve immunity against disturbances above the legal requirements.

 

More about:

  

ESMIG: http://esmig.eu/news/do-emc-disturbances-affect-smart-meters

 

Related:

 

Directive 2004/108/EC of the European Parliament and of the Council of 15 December 2004 on the approximation of the laws of the Member States relating to electromagnetic compatibility and repealing Directive 89/336/EEC Text with EEA relevance

 

Electromagnetic compatibility (EMC) - Part 4-19: Testing and measurement techniques - Test for immunity to conducted, differential mode disturbances and signalling in the frequency range 2 kHz to 150 kHz at a.c. power ports

 

Regulation (EC) No 764/2008 of the European Parliament and of the Council of 9 July 2008 laying down procedures relating to the application of certain national technical rules to products lawfully marketed in another Member State and repealing Decision No 3052/95/EC

 

Regulation (ec) no 765/2008 of the European Parliament and of the Council of 9 july 2008 setting out the requirements for accreditation and market surveillance relating to the marketing of products and repealing Regulation (EEC) No 339/93

 

Decisions adopted jointly by the European Parliament and the Council decision no 768/2008/ec of the European Parliament and of the Council of 9 july 2008 on a common framework for the marketing of products, and repealing Council Decision 93/465/EEC

 

Standard CENELEC - CLC/TR 50579 - electricity metering equipment (a.c.) - severity levels, immunity requirements and test methods for conducted disturbances in the frequency range 2 khz - 150 khz