This document applies to welded composite enclosures of cast and wrought aluminium alloy pressurized with dry air, inert gases (e.g. sulphur hexafluoride or nitrogen or a mixture of such gases), used in indoor and outdoor installations of high-voltage switchgear and controlgear with rated voltages above 1 kV, where the gas is used principally for its dielectric and\/or arc-quenching properties with rated voltages:<\/p>\n
above 1 kV and up to and including 52 kV concerning gas-filled compartments with design pressure higher than 300 kPa relative pressure (gauge);<\/p>\n<\/li>\n
above 52 kV concerning all gas-filled compartments.<\/p>\n<\/li>\n<\/ul>\n
The enclosures comprise parts of electrical equipment not necessarily limited to the following examples:<\/p>\n
circuit-breakers;<\/p>\n<\/li>\n
switch-disconnectors;<\/p>\n<\/li>\n
disconnectors;<\/p>\n<\/li>\n
earthing switches;<\/p>\n<\/li>\n
current transformers;<\/p>\n<\/li>\n
voltage transformers;<\/p>\n<\/li>\n
surge arrestors;<\/p>\n<\/li>\n
busbars and connections;<\/p>\n<\/li>\n
etc.<\/p>\n<\/li>\n<\/ul>\n
The scope also covers enclosures of pressurized components such as the centre chamber of live tank switchgear, gas-insulated current transformers, etc.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | Blank Page <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 4 Quality assurance 5 Normal and special service conditions 6 Materials 6.1 Selection of material <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 6.2 Chemical analysis <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 7 Design 7.1 General 7.2 Calculation methods 7.3 Inspection and access openings 8 Manufacture and workmanship 9 Repair of welding defects 10 Inspection, testing and certification 10.1 Type tests 10.2 Inspection and routine tests <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 10.3 Welding procedure specifications 10.4 Welder performance tests 10.5 Non-destructive testing 10.6 Design specification, drawings and data sheets 10.7 Certificate 10.8 Stamping 10.9 Final inspection 11 Pressure relief devices <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | Annex A (informative)A-deviation <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" High-voltage switchgear and controlgear. Gas-filled welded composite enclosures of cast and wrought aluminium alloys<\/b><\/p>\n |