IEC 60376 pdf download

IEC 60376 pdf download Specification of technical grade sulfur hexafluoride (SF 6 ) for use in electrical equipment
1 Scope
This International Standard defines the quality requirements and properties for technicalgrade sulfur hexafluoride (SF) for use in electrical equipment. It covers the properties andmethods of test applicable to SF。 when this substance is supplied for use in connection withany electrical equipment.
NOTE Throughout this standard, the term SFg stands for technical grade sulfur hexafluoride.2Normative references
The following referenced documents are indispensable for the application of this document.For dated references,only the edition cited applies.For undated references, the latest editionof the referenced document (including any amendments) applies.
IEC 60050(191), International Electrotechnical Vocabulary (IEV) – Chapter 191: Dependabilityand quality of service
IEC 60050(212)，International Electrotechnical Vocabulary (IEV) – Chapter 212: Insulatingsolids,liquids and gases
IEC 60050(441),International Electrotechnical Vocabulary (IEV) – Chapter 441:Switchgear,controlgear and fuses
IEC 60050(826)，International Electrotechnical Vocabulary (IEV) – Chapter 826: Electricalinstallations
IEC 60480,Guidelines for the checking and treatment of sulfur hexafluoride(SFe) taken fromelectrical equipment and specification for its re-use
IEC 61634,High-voltage switchgear and controlgear – Use and handling of sulfur hexafluoride(SF6) in high-voltage switchgear and controlgear
ISO 14040, Environmental management – Life cycle assessment – Principles and framework
3Terms and definitions
For the purposes of this document, the terms and definitions of lEC 60050(191),lEC 60050(212),IEC 60050(441) and lEC 60050(826) apply.
Some of the more important ones are listed here for easy reference.
3.1
electrical equipment
item used for such purposes as generation, conversion, transmission, distribution or utilizationof electrical energy,such as electric machines,transformers,switchgear and controlgear,measuring instruments,protective devices, wiring systems, current-using equipment
[lEV 826-16-01]
3.2
technical grade SF6
SF gas having a very low level of impurities in accordance with Table 1
3.3
container
any kind of cylinder suitable for pressurized SF6NOTE This general term will be used throughout the text.
4General properties of SF6
Sulfur hexafluoride is a compound having the formula SF6.At normal room temperatures andpressures(20 °C and 100 kPa)[1]1 it is gaseous and has a density of 6,07 kg/m3(about fivetimes the density of air). Since its critical temperature is 45,54 C, it can be liquefied bycompression [2].The pressure/temperatureldensity curves are given in lEC 61634.
SF。is colourless, odourless and non-toxic. lt is normally transported as a liquefied gas incontainers
caution
Although the gas is non-toxic，it will not support life, and equipment containingsulfur hexafluoride must not be entered without adequate ventilation. Similarly,since the gas has a much greater density than air, low lying areas, e.g. trenches,may contain high concentrations of the gas and the necessary precautions shallbe taken to avoid asphyxiation.
SF。is used in electrical equipment for the transmission and distribution ofelectricity (gas insulated substations，ring main units，circuit breakers,transformers，cables,etc.). lt is also used for non-electric purposes，such asmetallurgy, electronics,scientific equipment, etc.