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SMB/1825A/SPS STRATEGIC POLICY STATEMENT IEC/TC or SC

Secretariat

Date

IEC TC 17

Sweden

2002-04-05

Please ensure this form is annexed to the Report to the Committee of Action if it has been prepared during a meeting, or sent to the Central Office promptly after its contents have been agreed by the committee. Title of TC

Switchgear and Controlgear A. Background

Scope and responsibilities: To establish and maintain standards on high- and low-voltage switchgear and controlgear as well as their assemblies, together with associated control and/or power equipment, measuring and signalling equipment. Subcommittees 17 A: High-voltage switchgear and controlgear 17 B: Low -voltage switchgear and controlgear 17 C: High-voltage prefabricated switchgear and controlgear assemblies 17 D: Low –voltage switchgear and controlgear assemblies Liasons Inside IEC liasons are not formally established. Collaborations are carried out on a project basis, including the establishment of joint working groups. External to IEC UNIPEDE (Liason A) List of P-members: see Annex A, page7. B. Environment B.1 Business environment

IEC Standardization for switchgear and controlgear worldwide has reached a level far higher than that for most other types of equipment, today. As the development of electric power systems is a key issue for less industrialized and developing countries, and as these countries to a large extent lack experienced personnel, IEC standards on switchgear and controlgear also serve as means for the transfer of knowledge and as guideline for planning. In many cases high-voltage switchgear serves as the ultimate safety device in transmission and distribution networks. This aspect has great influence on the philosophy of work of the subcommittees dealing with high-voltage equipment and substations. Also, the interaction of high-voltage switchgear with networks and loads as well as the system’s reaction to switching operations have to be taken into account. High-voltage enclosed switchgear is mainly used due to environmental constraints of various types. It has special advantages regarding safety for personnel and flexibility. Interfaces with connected equipment require collaboration with other equipment committees. Gas-insulated transmission systems (GIL) have been developed in the recent years to replace lines and cables for very high transmission energies. 2/7

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Low-voltage switchgear built to IEC Standards is used mainly in industrial environments. However, possible handling by unskilled operators has to be taken into account. Therefore, increasing safety demands necessitate the development of new and the adaption of existing international standards. Low-voltage switchgear assemblies are of growing importance due to a higher degree of automation and control in buildings, construction sites, factories, offices, etc. Common to all types of switchgear are requirements for upmost reliability. This leads to high levels of testing during development and manufacture which are based on comprehensive standards for type and routine tests. The standards for the different spectra of products and applications of high-voltage and lowvoltage switchgear and controlgear address, along with the manufacturers of the equipment, mainly two groups of users: in the field of high-voltage particularly utilities, in the field of lowvoltage primarily industrial users and manufacturers of equipment into which low-voltage switchgear is integrated. While, generally speaking, the manufacturers of switchgear and controlgear are adequately represented in TC 17 and the subcommittees it would be desirable to have a more active participation from the users’ side. The evolution of switchgear and controlgear technologies, the trends toward higher degrees of automation, the integration of various additional functions into primary equipment, the changing political environments – saving of energy, deregulation, etc. – and the growth of the international trade require the maintenance of the existing as well as the development of new IEC standards on high- and low-voltage switchgear and controlgear. B.2 Market demand

Global market expansions continue to create high demands for international standards on switchgear and controlgear. Upon this background the harmonization of existing national standards through their integration into IEC is of major importance. B.3 Trends in technology and trade

No dramatic changes are foreseen in the principal technology of switchgear and controlgear. Yet, there is an ongoing evolution, particularly in the area of low-voltage towards power electronic switchgear and towards electronic control equipment. The complexity of low-voltage switchgear and switchgear assemblies will continue to grow. Integrated sensors are more and more used to control the operation of switchgear. In high-voltage switchgear electronic circuits are being incorporated for the integration of the switchgear into automated substation and network controls. Monitoring and life management aim at lowering the operatonal costs. High-voltage switchgear assemblies are installed to save space and further improve reliability. Gas-insulated transmission lines (GIL) will be an alternative to overhead lines and cables particularly to transport high amounts of energy. Political and economic constraints will reduce the safety margins, necessitate lower equipment and operational costs, and enforce development trends for higher reliability and availability. Electromagnetic imission will have to be considered very carefully due to the higher complexity of the switchgear and controlgear and the extensive application of electronic devices. B.4 Ecological environment

The nature of the primary technologies of switchgear and controlgear implies that practically all constructional elements can be recycled without limitations. There are no detrimental emissions during the switching process. Care is taken to avoid the use of toxic materials or materials which may produce toxic byproducts.

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One of the extinguishing media used in high-voltage switchgear is Sulphur Hexafluoride (SF6). This gas is listed as a greenhouse gas. This is recognized by establishing very low limits for permissible leakages and requiring the use of the gas in a closed cycle. Low- and high-voltage switchgear and controlgear does not emit electromagnetic disturbances. Visual and acoustic impact is controlled closely. C. Work programme Current work

The current status of programmes of work for TC 17 and its subcommittees (projects and timescale) can be found in the updated IEC database sheets which are included in annex A of the present report. TC 17 and its subcommittees meet every 18 months (on average). Up to now, no real difficulties were experienced in recruiting WG members – apart from the fact that a more active cooperation is desired from the users’ side – and in obtaining invitations for WG, SC and TC meetings. C.2 Resources/infrastructure needed

The available resources are sufficient for the ongoing work. The administrative support is considered adequate. Liasons within IEC, to external standardization bodies, organizations of manufacturers and users, and scientific corporations are established according to the need from ongoing work. On the high-voltage side the harmonization with ANSI/IEEE standards is being started. D. Future work

As there is almost no more common ground for high- and low-voltage switchgear and controlgear, their technologies, applications, manufacturers and users, TC 17 is reconsidering its structure. The aim is to improve the efficiency of the individual product committees. Close cooperation is maintained between the high-voltage side of TC 17 and Sector Board 1. SC 17 A and 17 C continue their efforts for harmonization particularly with ANSI/IEEE standards. The existing publications are being reviewed continuously. Taking into account the necessity to transfer the knowledge established within the subcommittees, particularly within the working groups, certain application guides will be worked out. They will be issued as reports under individual IEC publication numbers. All subcommittees of TC 17 are concerned with the subject of EMC, particularly to ensure proper operation of components within the secondary and control circuits of different types of switchgear and controlgear. Based on work carried out by CIGRE on behalf of SC 17 A the testing requirements for highvoltage circuit-breakers rated below 100 kV will be reviewed. SC 17 B has accomplished to prepare the new IEC 60947 series publications concerning lowvoltage switchgear and controlgear and their maintenance. The work is continued to complete this IEC 60947 series and to prepare amendments on the existing publications for items left under consideration. SC 17 C has given high priority to the standardization of communication systems within the prefabricated high-voltage switchgear assemblies and their links to the substation protection and control. Future subjects of SC 17 D will be insulation coordination within low-voltage switchgear and

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controlgear assemblies and the standardization of enclosures for such assemblies. Overlapping subjects are being and will be treated jointly by SC 17 A/C and SC 17 B/D. Consequently, these subcommittees conduct joint meetings. E. Maintenance cycle of SC 17A

Publication no.

60056 60056 am 1 60056 am 2 60129 60265-1 60265-2 60420 60427 60470 60694 60694 am 1 60694 am 2 61166 61233 61633 61634 62063

Date of publication

1987 2001 2001 1984 1998 1988 1990 2000 1999 1996 2000 2001 1993 1995 1995 1995 1999

Review date

FDIS in 2000-09 CDV in 2000-11 CDV in 2000-11 FDIS in 2000-11 2006 CDV in 2000-11 2000-09 2007 2003 FDIS FDIS in 2000-11 2001 2002 2003 2003 2007

Validity date

Responsibility (Maintenance Team)

WG 21 WG 21 (TF) WG 23 WG 22 MT MT WG 27 MT 28 MT MT WG 19, 20 & 24 WG 20 & 24 MT MT MT MT MT

2010 2000 2003 2011 2008

2005 2007 2007 2007 2011

E. Maintenance cycle of SC 17B

Publication no.

60158-2 Ed.1

Date of publication Current edition

Amend. 1

Amend. 2

1982

-

-

Publication date for proposed amendment or revision

Responsibility (Maintenance Team)

Cancellation in progress, superseded by IEC 60947-4-2 and IEC 60947-4-3

60715 Ed.1 1981 1995 2013 60947-1 Ed.3 1999 2000 1) - 2001 2) - 2004 60947-2 Ed.2 1995 1997 2000 3) - 2001 4) - 2004 60947-3 Ed. 2 1999 2000 5) - 2003 60947-4-1 Ed.1 1990 1994 1996 2000 6) - 2003 60947-4-2 Ed.2 1999 2000 7) - 2003 60947-4-3 Ed.1 1999 2002 60947-5-1 Ed.2 1997 1999 1999 2003 60947-5-2 Ed.2 1997 1999 2002 60947-5-3 Ed.1 1999 2002 60947-5-4 TR2 Ed.1 1996 2001 60947-5-5 Ed.1 1997 2001 60947-5-6 Ed.1 1999 2003 60947-6-1 Ed.1 1989 1994 1997 2002 60947-6-2 Ed.1 1992 1997 1998 2001 60947-7-1 Ed.1 1989 1999 2002 60947-7-2 Ed.1 1995 2001 60999-2 Ed.1 1995 2001 61095 Ed.1 1992 1999 8) - 2002 1) Amendment in progress: project 60947-1 A1 Ed.3 – Document 17B/977/CDV 2) Amendment in progress: project 60947-1 A2 Ed.3 – Document 17B/999/CD 3) Amendment in progress: project 60947-2 A2 Ed.2 – Document 17B/989/CDV 4) Amendment in progress: project 60947-2 A3 Ed.2 – Documents 17B/1031/CD 5) Amendment in progress: project 60947-3 A1 Ed.2 – Document 17B/987/CDV 6) Amendment in progress: project 60947-4-1 A3 Ed.1 – Document 17B/982/CDV 7) Amendment in progress: project 60947-4-2 A1 Ed.2 – Document 17B/997/CD 8) Amendment in progress: project 61095 A1 Ed.1 – Document 17B/970/CDV 5/7

WG2 MT11 WG5 WG6 WG2 WG2 WG2 WG3 WG3 WG3 WG3 WG3 WG3 WG2 WG2 WG9 WG9 WG9 WG2

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E. Maintenance cycle SC 17C

Publication no.

Date of publication

60466 60932 61330

1987 1988 1995

61958 61259 61639 61640 60859

2000 1994 1996 1998 1999

Review date

2003 2002 to be fixed 2000 in Stockholm 2001 2002 2000 2001 2003

Validity date

Responsibility (Maintenance Team)

-

MT14 MT14 MT14

-

MT14 MT15 MT15 MT15 MT15

E. Maintenance cycle SC 17D

Publication no.

60439-1 60439-5 60890 61117 61641 60439-2 60439-3-am1 60439-4

Date of publication

Review date

1999-09 1998-10 1987-07 1992-02 1996-01 2000-03 1993-10 1999-07

Validity date

Responsibility (Maintenance Team)

MT 11 MT 11 MT 11 MT 11 MT 11 MT 12 MT 13 MT 14

Name or signature of the secretary

A. Bosma, Sweden

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ANNEX A List of P-Members for TC 17, SC17A, SC17B, SC17C TC 17

SC 17A

SC 17B

SC 17C

Austria Australia Belgium Canada Switzerland China Czech Republic Germany Denmark Egypt Spain Finland France United Kingdom Hungary Indonesia Ireland India Italy Japan Korea (Republic of) Netherlands Norway Poland Portugal Romania Russian Fed. Sweden Turkey Ukraine USA Yugoslavia South Africa

P P P P P P P P P P P P P P P P P P P P P P P P P P P P

P P P P P P P P P P P P P P P P P P P P P P P P P P P P P

P P P P P P P P P P P P P P P P P P P P P P P P P P P

P P P P P P P P P P P P P P P P P P P P P P P P P P P

TOTAL

28

29

7

27

Country

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