This document applies to wrought aluminium and aluminium alloy enclosures and their welding. These enclosures are pressurized with dry air, inert gases, for example 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. The enclosures comprise parts of electrical equipment not necessarily limited to the following examples:<\/p>\n<\/li>\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 | ||||||
| 8<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 4 Quality assurance 5 Normal and special service conditions <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 6 Materials 6.1 Selection of material <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 6.2 Chemical analysis 7 Design 7.1 General <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 7.2 Calculation methods 7.2.1 General 7.2.2 Evaluation of mechanical strength using \u201cDesign by Formula\u201d <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 7.2.3 Evaluation of mechanical strength using \u201cDesign by Analysis\u201d 7.2.3.1 Normal loads 7.2.3.2 Exceptional loads <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 7.2.4 Evaluation of mechanical strength using \u201cDesign by Burst test\u201d 7.2.4.1 General 7.2.4.2 Burst test procedure 7.2.4.3 Strain measurement test procedure <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 7.2.5 Flanges 7.2.6 Bolted connections 7.2.6.1 General <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 7.2.6.2 Normal loads 7.2.6.3 Exceptional loads 7.3 Inspection and access openings 8 Manufacture and workmanship 8.1 Material identification 8.2 Order of completion of weld seams 8.3 Cutting of materials 8.3.1 General 8.3.2 Cold sharing <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 8.3.3 Thermal cutting 8.3.4 Examination of cut edges 8.4 Forming of shell sections and end plates 8.5 Assembly tolerances 8.6 Welded joints 8.7 Assembly for welding 8.8 General welding requirements <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 8.9 Preheating 8.10 Surface finish 9 Repair of welding defects <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 10 Inspection, testing and certification 10.1 Type tests 10.1.1 General 10.1.2 Burst test procedure 10.1.3 Strain measurement test 10.2 Inspection and routine tests 10.2.1 General <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 10.2.2 Routine pressure tests 10.3 Welding procedure specifications 10.4 Welder performance tests 10.5 Non-destructive testing 10.5.1 Amount of testing of welded joints <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 10.5.2 Test methods for weld seams 10.5.2.1 Radiography 10.5.2.2 Ultrasonic 10.5.2.3 Penetrant method 10.5.3 Surface conditions and preparations for testing <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 10.5.4 Marking of the enclosure welds 10.5.5 Reporting 10.5.6 Minimum acceptance levels 10.5.7 Assessment of imperfections <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 10.6 Design specification, drawings and data sheets 10.7 Certificate 10.8 Stamping 10.9 Final inspection <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 11 Pressure relief devices 11.1 General 11.2 Bursting discs 11.3 Self-closing pressure relief valves 11.4 Non-self-closing pressure relief devices <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Annex A (informative)A-deviation <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" High-voltage switchgear and controlgear. Gas-filled wrought aluminium and aluminium alloy enclosures<\/b><\/p>\n |