IEC TC nominations

TC 28, TC 31 and TC 76 have new Officers

By Claire Marchand

This month, e-tech announces various nominations for IEC TCs (Technical Committees).

Explosive environment
Explosive environment

IEC TC 28 Insulation co-ordination

SMB (Standardization Management Board) has approved the nomination of Karl-Heinz Weck to a fifth term as Chairman of IEC TC 28: Insulation co-ordination. The new term runs from 1 August 2011 to 31 July 2014.

TC 28 is responsible for the standardization of power systems with nominal voltage above 1 000 V a.c. (alternative current) and 1 500 V d.c. (direct current). Standards prepared by TC 28 cover:

  • definitions used for insulation standardization and co-ordination
  • basic principles
  • fields of application
  • specification of a series of standard insulation levels (without regard to any particular type of equipment)
  • a full statement of the tests to be included in the specification of the equipment to meet the insulation levels to be used in relation to the possibilities of overvoltage protective devices
  • recommendations for the minimum clearance distance in air between live parts
  • an application guide for users of electrical equipment, recommending the insulation levels to be used in relation to the possibilities of overvoltage protective devices

For a.c. systems the trend foreseen is the development of UHV (Ultra High Voltage) transmission systems. In its future work, TC 28 will need to address the demands pertaining to this development for a.c. as well as for d.c. systems.

IEC TC 31 Equipment for explosive atmospheres

SMB has approved the nomination of Jim Munro to a fourth term as Chairman of IEC TC 31: Equipment for explosive atmospheres. The new term runs from 1 August 2011 to 31 July 2014.

The standards prepared by TC 31 are used in any industry where explosive atmospheres of gas, vapour, mists and dusts may be present. Typical industries include oil and gas, chemical, plastics, grain, pharmaceutical, shipping, mining and coal industries.

The standards produced cover the life-cycle of equipment through design, manufacture, installation, maintenance and repair. There are also standards dedicated to installations such as those on hazardous area classification and inspection.

Improved safety in environments where explosive atmospheres may occur is of primary concern, but there is also need for uniform operational practices in these areas to promote free trade of the products used and to assist economic development.

IEC TC 76 Optical radiation safety and laser equipment

SMB has approved the nomination of Jerome E. Dennis to a fourth term as Chairman of IEC TC 76: Optical radiation safety and laser equipment. The new term runs from 1 July 2011 to 30 June 2014.

IEC TC 76 has been working in the domain of laser, LED (light emitting diode) and other optical radiation safety of equipment and is recognized as the leading body on laser standardization in this area. It also provides guidance to other IEC TCs preparing vertical standards for products containing optical radiation sources.

Areas where laser radiation sources have played and will continue to play a major role are surgical and medical therapeutic and diagnostic equipment, including cosmetic uses; materials processing in industry; optical communications, general and local networks; office machines; measurement systems for use in a variety of environments; laser light shows and displays and full colour TV LED and laser displays; and consumer equipment such as CD/DVD players/recorders and home improvement aids.

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Insulation Insulation
Explosive environment Explosive environment
Laser light. Laser light.