Specifications for the re-use of sulphur hexafluoride (SF6) and its mixtures in electrical equipment
|Publication Date:||1 April 2019|
|ICS Code (Insulating gases):||29.040.20|
|ICS Code (Switchgear and controlgear in general):||29.130.01|
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-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 1.
For the purposes of this document, the complementary gases used in SF6 mixtures will be limited to N2 or CF4.
1 Numbers in square brackets refer to the bibliography.