This document applies to wrought steel 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 1kV , 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 k9 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 | ||||||
| 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 7 Design 7.1 General 7.2 Calculation methods 7.2.1 General <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 7.2.2 Evaluation of mechanical strength using \u201cDesign by Formula\u201d 7.2.3 Evaluation of mechanical strength using \u201cDesign by Analysis\u201d 7.2.3.1 Normal loads <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 7.2.3.2 Exceptional loads 7.2.4 Evaluation of mechanical strength using \u201cDesign by Burst test\u201d 7.2.4.1 General <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 7.2.4.2 Burst test procedure 7.2.4.3 Strain measurement test procedure <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 7.2.5 Flanges 7.2.6 Bolted connections 7.2.6.1 General 7.2.6.2 Normal loads 7.2.6.3 Exceptional loads <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 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 8.4 Forming of shell sections and end plates 8.5 Assembly tolerances 8.6 Welded joints <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 8.7 Assembly for welding 8.8 General welding requirements 8.9 Preheating 8.10 Surface finish 9 Repair of welding defects <\/td>\n<\/tr>\n | ||||||
| 19<\/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 | ||||||
| 20<\/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 | ||||||
| 21<\/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 | ||||||
| 22<\/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 | ||||||
| 24<\/td>\n | 10.6 Design specification, drawings and data sheets 10.7 Certificate 10.8 Stamping 10.9 Final inspection <\/td>\n<\/tr>\n | ||||||
| 25<\/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 | ||||||
| 27<\/td>\n | Annex A(informative)A-deviations <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" High-Voltage Switchgear and Controlgear. Gas-filled wrought steel enclosures<\/b><\/p>\n |