Technical Committee 13 of the International Electrotechnical Commission (IEC) met as part of a general meeting of the IEC in Cape Town, South Africa, on 18 October 2005. TC13 is concerned with standards for electricity meters and associated equipment. Its chairman is Dr. Bernd Schulz (Germany) and its secretary is Gyozo Kmethy (Hungary). Meetings are held at 3-4 year intervals to review progress and set a future work programme.
Dr. Schulz opened the meeting by referring to the changing background against which TC13 was working. The key changes since the last TC13 meeting in 2001 were:
• Procurement is becoming more international as large utilities operate in several countries following deregulation.
• Deregulation has also led to new responsibilities for metering.
• There has been further consolidation of meter equipment manufacturers.
• Environmental issues and the need to conserve resources have become more important. Metering is seen as a useful tool in influencing customer demand.
• As regards Europe, the EU has been enlarged, creating a larger market. In addition the Measuring Instruments Directive (MID) has been adopted and will take effect in October 2006, impacting on metering.
Dr. Schulz said that the standards produced by TC13 should serve the needs of parties having to react to these changes, and to technology developments generally.
TC13 has four active Working Groups and reports were received from the convenors of each.
WG 11 is concerned with standards for meter products, including test criteria. On behalf of convenor Bruno Ricciardi (Switzerland), Gyozo Kmethy reported that work to migrate to the new IEC 6205x series had continued and was largely complete, with only a few ‘old’ standards remaining. These would be considered as new work, but in the immediate future the priorities were seen as a new IEC 62058 series (acceptance testing) to replace IEC 60514, and IEC 62053-24 (static meters for reactive energy of Class 1 and 0.5) to complement IEC 62052-23.
In addition it was likely that safety requirements in product standards would need to be reviewed as a result of a recommendation by IEC’s Sector Management Board 1. There was a discussion about whether in-service testing should be addressed by WG11, but the conclusion was that this might be outside its scope, and that there would need to be consultation on the matter. Of the other ‘old’ standards a decision was required as to whether to update IEC 60736 (testing equipment).
WG13 is concerned with dependability (reliability) aspects of meters. Convenor Jacques Talbot (France) reported that work had progressed on the IEC 62059 series of standards, and that 62059-41 (reliability prediction) was at the final stage of agreement. Work was in progress on 62059-31 (accelerated reliability testing) and was to start on 62059-51 (software aspects of reliability), which was likely to take account of work which had been done by a European consortium associated with WELMEC (the Western European Legal Metrology Co-operation). The MID had the concept of ‘durability’ (ie in-service life) in addition to ‘reliability’, and work could be done to identify the differences.
WG 14 is concerned with communications for metering, tariff and load control. On behalf of convenor Thomas Schaub (Switzerland), who had recently taken over from Paul Fuchs (also Switzerland), Gyozo Kmethy reported that the group’s title was to be changed to indicate that it dealt with data modelling as well as data exchange. As regards the former, standards for ‘OBIS’ and interface classes were now in place: as regards the latter, various implementations of DLMS over differing physical layers had been defined, including use of TCP/IP protocols.
Additionally IEC 62056-21 (direct local data exchange – formerly IEC 1107) had been modified to allow switching to DLMS. Future work might be needed to review and possibly increase security aspects of DLMS, following work being done elsewhere in IEC, and a proposal from Sweden for a ‘light’ version of DLMS was awaited (unfortunately Sweden was not represented at the meeting).
Likewise, France was expected to table a proposal for work to revise 62056-31 (data exchange over area networks – EURIDIS – formerly IEC 1142).
WG15 is concerned with payment (prepayment) systems. Convenor Bob Loe (UK) reported that two standards had been produced relating to the framework for payment systems (IEC 62055- 21) and particular requirements for payment meters (62055-31). A specification for a ‘standard transfer system’, as used in South Africa, had been adopted as an IEC PAS (Publicly Available Standard). The next work was to turn this into three new IEC standards defining the application and physical layers and a virtual token carrier. It was stressed that these would not be parallel voted in CENELEC (as most IEC standards are) as they did not relate to European practice. Future work additional to this would be discussed at the next meeting of WG15, planned for September 2006.
TC13 liaises with several other IEC TCs and other bodies relevant to its work, and presentations were made to indicate the implications of the following:
• OIML (Organisation Internationale de Métrologie Légale) which was revising its recommendation IR46 relating to static electricity meters. There was a need to clarify the status of this work and its relationship to IEC.
• IEC TC66 (group safety of electrical equipment) which has sought to include electricity meters in one of its generic safety standards (IEC 61010).
• IEC TC8 (system aspects of electricity supply) and TC56 (dependability) where new co-operative links were needed.
• IEC TC57 (communications for network control) where there was a need to define interfaces between SCADA-type systems and AMR control stations.
• The DLMS User Association, which would maintain DLMS standards and handle matters such as user registration and conformity assessment.
• The Standard Transfer System Association, which would do likewise for the PAS-related standards.
With regard to TC66, delegates agreed that it was important for TC13 to retain control of specifying safety aspects of electricity meters. With regard to TC57, it was noted that any interface standards should take account of the OBIS and interface class standards of DLMS (ie object modelling).
CHANGES IN THE IEC
Charles Jacquemart (IEC central office) briefly indicated some changes in IEC organisation and procedures over the last four years. These were aimed both at assisting experts involved in standards production and speeding up the process, and included:
• Introduction of the PAS option.
• Formal liaison options categorised as A, B or C with relevant bodies.
• Option for simultaneous circulation of an NP (New work Proposal) and CDV (Committee Draft for Voting) for ‘suitable quality’ documents.
• New IEC directives, including that CDVs are to be available two years after starting work, and that CDVs which have no negative votes can go straight to publication, skipping the FDIS (Final Draft International Standard) stage.
• Revised IEC web site with 100% electronic support and on-line access to the International Electrotechnical Vocabulary (as to what is defined).
STRATEGIC POLICY STATEMENT/WORK PROGRAMME
IEC TCs are required to issue and periodically update a strategic policy statement which sets out their scope, the background within which they operate and their work programme. There was discussion of a proposed update to TC13’s document, and comments would be taken into account by the secretary in producing a revised version, particularly as regards a proposal to extend the scope to cover safety aspects and ‘secondary meters’, which would require further consultation. The proposed ongoing and new work was summarised (see Table) and this would be used to update the IEC database.
It was agreed that the next meeting should be in 2007, probably in France; the date and location would be confirmed.
Thanks are due to the South African Bureau of Standards and the sponsors for the work they did in terms of organising and hosting the meeting, which was a great success.