29.040.20 - Insulating gases

This International Standard gives the requirements for polyimide films used for electrical purposes. Materials which conform to this specification meet established levels of performance. However, the selection of a material by a user for a specific application should be based on the actual requirements necessary for adequate performance in that application and not based on this specification alone. Safety warning: it is the responsibility of the user of the methods contained or referred to in this document to ensure that they are used in a safe manner.

This document provides criteria for the re-use of sulphur hexafluoride (SF6) and its mixtures after recovery and reclaiming from electrical equipment (e.g. for maintenance, at the end-oflife). Sulphur hexafluoride (SF6), nitrogen (N2) and carbon tetrafluoride (CF4), are gases commonly used for electrical equipment. Taking into account environmental concerns, particular attention is paid to re-use criteria for SF6 and its mixtures with N2 and CF4 for its use in electrical equipment. Procedures for recovering and reclaiming used SF6 and its mixtures are outside the scope of this document and are described in IEC 62271-4. This document provides several annexes on the description of the different methods of analysis, on by-products, on the procedure for evaluating the potential health effects from byproducts, on cryogenic reclaiming of SF6, and on reclaiming recommendations. Storage, transportation and disposal of SF6 and its mixtures are outside the scope of this document and are covered by IEC 62271-4. Procedures to determine SF6 leakages are described in IEC 60068-2-17 [4]1. For the purposes of this document, the complementary gases used in SF6 mixtures will be limited to N2 or CF4.

IEC 60376:2018 defines the quality for technical grade sulphur hexafluoride (SF6) and complementary gases such as nitrogen (N2) and carbon tetra-fluoride (CF4), for use in electrical equipment. Detection techniques, covering both laboratory and in-situ portable instrumentation, applicable to the analysis of SF6, N2 and CF4 gases prior to the introduction of these gases into the electrical equipment are also described in this document. This document provides some information on sulphur hexafluoride in Annex A and on the environmental effects of SF6 in Annex B. Information about SF6 by-products and the procedure for evaluating the potential effects of SF6 by-products on human health are covered by IEC 60480, their handling and disposal being carried out according to international and local regulations with regard to the impact on the environment. Handling of SF6 and its mixtures is covered by IEC 62271-4. Procedures to determine SF6 leakages are described in IEC 60068-2-17. For the purposes of this document, the complementary gases used in SF6 mixtures will be limited to N2 or CF4. This third edition cancels and replaces the second edition published in 2005. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) the requirements for the use of SF6 in electrical equipment have been confirmed; b) a specification for complementary gases to be used in SF6 mixtures with N2 and CF4 has been included; c) the introduction and scope have been merged; d) a new repartition of the annexes of IEC 60376, IEC 60480 and IEC 62271-4 has been included.

This document provides criteria for the re-use of sulphur hexafluoride (SF6) and its mixtures
after recovery and reclaiming from electrical equipment (e.g. for maintenance, at the end-oflife).
Sulphur hexafluoride (SF6), nitrogen (N2) and carbon tetrafluoride (CF4), are gases commonly
used for electrical equipment. Taking into account environmental concerns, particular
attention is paid to re-use criteria for SF6 and its mixtures with N2 and CF4 for its use in
electrical equipment. Procedures for recovering and reclaiming used SF6 and its mixtures are
outside the scope of this document and are described in IEC 62271-4.
This document provides several annexes on the description of the different methods of
analysis, on by-products, on the procedure for evaluating the potential health effects from byproducts,
on cryogenic reclaiming of SF6, and on reclaiming recommendations.
Storage, transportation and disposal of SF6 and its mixtures are outside the scope of this
document and are covered by IEC 62271-4. Procedures to determine SF6 leakages are
described in IEC 60068-2-17 [4]1.
For the purposes of this document, the complementary gases used in SF6 mixtures will be
limited to N2 or CF4.

IEC 60480:2019 provides criteria for the re-use of sulphur hexafluoride (SF6) and its mixtures after recovery and reclaiming from electrical equipment (e.g. for maintenance, at the end-of-life).
Sulphur hexafluoride (SF6), nitrogen (N2) and carbon tetrafluoride (CF4), are gases commonly used for electrical equipment. Taking into account environmental concerns, particular attention is paid to re-use criteria for SF6 and its mixtures with N2 and CF4 for its use in electrical equipment. Procedures for recovering and reclaiming used SF6 and its mixtures are outside the scope of this document and are described in IEC 62271-4.
This document provides several annexes on the description of the different methods of analysis, on by-products, on the procedure for evaluating the potential health effects from by-products, on cryogenic reclaiming of SF6, and on reclaiming recommendations.
Storage, transportation and disposal of SF6 and its mixtures are outside the scope of this document and are covered by IEC 62271-4. Procedures to determine SF6 leakages are described in IEC 60068-2-17.
For the purposes of this document, the complementary gases used in SF6 mixtures will be limited to N2 or CF4.
This third edition cancels and replaces the second edition, published in 2004. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
• specifications for the re-use of SF6 have been confirmed;
• specifications for the re-use of SF6 mixtures, namely SF6/N2 and SF6/CF4 mixtures are included;
• as a result of a new repartition of annexes in IEC 60376, IEC 60480 and IEC 62271-4, this new edition now contains the following five annexes:
– Annex A: Description of methods of analysis (on-site and laboratory);
– Annex B: By–products of SF6 and its mixtures;
– Annex C: Procedure for evaluating the potential effects on health from by products of SF6 and its mixtures;
– Annex D: Reclaiming recommendations.
– Annex E: Cryogenic reclaiming of SF6;

This document defines the quality for technical grade sulphur hexafluoride (SF6) and
complementary gases such as nitrogen (N2) and carbon tetra-fluoride (CF4), for use in
electrical equipment. Detection techniques, covering both laboratory and in-situ
portable instrumentation, applicable to the analysis of SF6, N2 and CF4 gases prior to the
introduction of these gases into the electrical equipment are also described in this document.
This document provides some information on sulphur hexafluoride in Annex A and on the
environmental effects of SF6 in Annex B.
Information about SF6 by-products and the procedure for evaluating the potential effects of
SF6 by-products on human health are covered by IEC 60480, their handling and disposal
being carried out according to international and local regulations with regard to the impact on
the environment. Handling of SF6 and its mixtures is covered by IEC 62271-4.
Procedures to determine SF6 leakages are described in IEC 60068-2-17.
For the purposes of this document, the complementary gases used in SF6 mixtures will be
limited to N2 or CF4.

IEC 60376:2018 defines the quality for technical grade sulphur hexafluoride (SF6) and complementary gases such as nitrogen (N2) and carbon tetra-fluoride (CF4), for use in electrical equipment. Detection techniques, covering both laboratory and in-situ portable instrumentation, applicable to the analysis of SF6, N2 and CF4 gases prior to the introduction of these gases into the electrical equipment are also described in this document.
This document provides some information on sulphur hexafluoride in Annex A and on the environmental effects of SF6 in Annex B.
Information about SF6 by-products and the procedure for evaluating the potential effects of SF6 by-products on human health are covered by IEC 60480, their handling and disposal being carried out according to international and local regulations with regard to the impact on the environment. Handling of SF6 and its mixtures is covered by IEC 62271-4.
Procedures to determine SF6 leakages are described in IEC 60068-2-17.
For the purposes of this document, the complementary gases used in SF6 mixtures will be limited to N2 or CF4.
This third edition cancels and replaces the second edition published in 2005. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) the requirements for the use of SF6 in electrical equipment have been confirmed;
b) a specification for complementary gases to be used in SF6 mixtures with N2 and CF4 has been included;
c) the introduction and scope have been merged;
d) a new repartition of the annexes of IEC 60376, IEC 60480 and IEC 62271-4 has been included.

Describes methods of determining the mechanical and electrical resistance and the adhesive properties of pressure-sensitive adhesive tapes, and the test methods to be used.

Contains the requirements for combination tapes made of creped cellulosic paper and polyethylene terphthalate film with rubber thermosetting adhesive.

This part of IEC 61212 describes methods of test for the materials defined in IEC 61212-1. Materials which conform to this specification meet established levels of performance. However, the selection of a material by a user for a specific application should be based on the actual requirements necessary for adequate performance in that application and not based on this specification alone.

This part of IEC 61212-3 gives requirements for industrial rigid round laminated moulded rods for electrical purposes, based on different resins and different reinforcements. Materials which conform to this specification meet established levels of performance. However, the selection of a material by a user for a specific application should be based on the actual requirements necessary for adequate performance in that application and not based on this specification alone.

This part of IEC 61212 gives the definitions related to the designations to be used for, and the general requirements to be fulfilled by, industrial rigid round laminated tubes and rods for electrical purposes made with any of the following resins as the binder: phenolic, epoxy (epoxide), melamine and silicone. The following reinforcements may be used either singly or in combination: cellulosic paper, woven cotton cloth, woven glass cloth, mica paper.

This standard describes the method of determining fibre contamination of mineral insulating oil used in electrotechnical equipment by counting the number of fibres on the surface of a membrane filter

2021: CLC legacy converted by DCLab NISOSTS

Contains the definitions, designations and general requirements of aramid pressboard for electrical purposes. The selection of these materials is also recommended for use in applications other than electrical insulation.

Gives the methods of test applicable for the materials classified in IEC 61629-1.

HD 621 applies to impregnated paper insulated cables for rated voltages Uo/U(Uml from 3,6/6(7,2)kV up to 20,8/36(42)kV used in power distribution systems. This part (Part 1) specifies the general requirements applicable to these cables, unless otherwise specified in the particular sections of this H D. Test methods specified are given in HD 605, EN 60811, HD 383 and HD 405 and in IEC 55-1 and IEC 229. Part 2 covers all those test methods which are specific to paper insulated cables, and not included in HD 605. The particular types of cables are specified in Parts 3 and 4.

This specification covers material having a nominal thickness from 0,05 mm to 0,15 mm, supplied either in the form of sheets or rolls.

Composed of mica splittings or mica paper, with or without reinforcement, bonded with a suitable binder and may be supplied as sheets or rolls. This specification covers material having a nominal thickness from 0,10 mm to 7 mm.

This specification covers material having a nominal thickness from 0,07 mm to 0,12 mm and supplied in roll form.

Describes an empirical test procedure intended to indicate the presence of contaminants such as water and solid suspended matter, and the advisability of carrying out drying and filtration treatment. Standardized testing procedures and equipment are essential for the unambiguous interpretation of test results.

Gives definitions and classification for ceramic, glass, and glass-ceramic materials to be used for electrical insulation purposes.

Describes a method of test for comparing the performance of insulating materials, when they are exposed intermittently to a liquid contaminant and then to an a.c. electric stress along their surface.

Type 1 tapes are woven on conventional looms with glass fibres, type 2 tapes are woven on shuttle-less looms with glass fibres, type 3 tapes are woven on shuttle-less looms with warp glass fibres and weft polyester fibres.

Applies to tapes woven on conventional or shuttleless looms from continuous filament polyester fibres. This sheet gives specific requirements for the number of warp ends, the number of picks, the shrinkage (length and width) and the tensile strength of two types of tape.

Gives requirements for materials made by combining mica paper with glass fabric and impregnating the mica paper with an epoxy resin. The material is supplied in a flexible state for final cure after application in the form of sheets or rolls.

Gives requirements for materials made by combining mica paper with a single polyester film and impregnating the mica paper with an epoxy resin. The material is supplied in a flexible state for final cure after application in the form of sheets or rolls.

Gives requirements for several types of mica materials based on mica splittings or mica paper for application in electrical heating equipment.

Gives the requirements for the following polyimide films with or without heat sealable fluoroethylene-propylene (FEP) coatings; based on poly(N,N'-p,p'-oxydiphenylene pyromellitimide)(sheet 4); based on poly(N,N'-p-phenylene biphenyl tetra carboxylimide)(sheet 5); based on poly(N,N'-p,p'-oxydiphenylene biphenyl-tetracarboxylimide)(sheet 6).

Applies to all insulating liquids, used and unused, the kinematic viscosity of which is lower than or equal to 300 mm2/s at 40 °C.

Guide to the maintenance of synthetic organic esters, originally complying with the requirements of EN 61099, in transformers with rated voltages up to 35 kV.

Specifies general requirements for pressure-sensitive adhesive tapes for electrical purposes. Particular types of tape are designated by using the code letters for the form and nature of backing material given in a new table, followed by the figures for temperature index and code letters for the adhesive, as indicated in an updated table.

Specifies test methods for the analysis of 2-furfural and related furan compounds resulting from the degradation of cellulosic insulation and found in mineral insulating oil samples taken from electrical equipment.

Concerns the re-use of sulfur hexafluoride (SF6) after removal from electrical equipment (for maintenance, or at the end of life). This standard recommends procedures for reclaiming used SF6 and for restoring its quality to an acceptable level, which would allow the filling of new or existing electrical equipment. This standard provides guidance to operational and maintenance personnel for the testing and safe handling of used SF6 . The main changes with respect to the previous edition are listed below: - updating of standard as it relates to environmental issues, storage and analytical methods; - addition of specification for the re-use of gas; - inclusion of a regeneration process for sulfur hexafluoride taken from electrical equipment.

This International Standard defines the quality  requirements and properties for technical  grade sulfur hexafluoride (SF6) for use in  electrical equipment. It covers the properties  and methods of test applicable to SF6 when  this substance is supplied for use in  connection with any electrical equipment. This  second edition differs widely from the first one.  The focus is now on the specification of the  gas needed for electrical applications. As a  consequence, the term employed to name  this gas is "technical grade" in place of "new".  Based on experience, the acceptable impurity  levels have been increased. However, the gas  as defined in this new second edition has the  same performance in electrical equipment as  the gas previously defined in the first edition.  The analytical methods for the SF6 analysis  have been removed as it has been found  confusing to prescribe methods that can  become obsolete very rapidly.

Contains requirements for pressure-sensitive adhesive tapes made ofcellulose-acetate-butyrate film with rubber thermosetting adhesive.

This part of IEC 61212-3 gives requirements for industrial rigid round laminated moulded tubes for electrical purposes, based on different resins and different reinforcements. Materials which conform to this specification meet established levels of performance. However, the selection of a material by a user for a specific application should be based on the actual requirements necessary for adequate performance in that application and not based on this specification alone.

This International Standard defines the quality requirements and properties for technical grade sulfur hexafluoride (SF6) for use in electrical equipment. It covers the properties and methods of test applicable to SF6 when this substance is supplied for use in connection with any electrical equipment. This second edition differs widely from the first one. The focus is now on the specification of the gas needed for electrical applications. As a consequence, the term employed to name this gas is technical grade in place of new. Based on experience, the acceptable impurity levels have been increased. However, the gas as defined in this new second edition has the same performance in electrical equipment as the gas previously defined in the first edition. The analytical methods for the SF6 analysis have been removed as it has been found confusing to prescribe methods that can become obsolete very rapidly.

Concerns the re-use of sulfur hexafluoride (SF6) after removal from electrical equipment (for maintenance, or at the end of life). This standard recommends procedures for reclaiming used SF6 and for restoring its quality to an acceptable level, which would allow the filling of new or existing electrical equipment. This standard provides guidance to operational and maintenance personnel for the testing and safe handling of used SF6 . The main changes with respect to the previous edition are listed below: - updating of standard as it relates to environmental issues, storage and analytical methods; - addition of specification for the re-use of gas; - inclusion of a regeneration process for sulfur hexafluoride taken from electrical equipment.

Contains the requirements for combination tapes made of creped cellulosic paper and polyethylene terphthalate film with rubber thermosetting adhesive.

Superseded by HD 631.1 S2:2007

EN following parallel vote * Superseded by EN 60819-1:2012

EN following parallel vote * Superseded by EN 60626-1:2012

Contains the requirements for quartz filled epoxy resinous compounds in the cured form.

Gives the requirements for laminated precompressed board comprised of 100 % sulphate wood pulp or a mixture of sulphate wood pulp and cotton, bonded with two bonding agents; casein and non-aqueous.