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BS EN 50068:2018 – TC:2020 Edition

BS EN 50068:2018 – TC:2020 Edition

$186.33

Tracked Changes. High-Voltage Switchgear and Controlgear. Gas-filled wrought steel enclosures

Published By Publication Date Number of Pages
BSI 2020 119
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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: – above 1 kV and up to and including 52 kV concerning gas-filled compartments with design pressure higher than 300 kPa relative pressure (gauge); – above 52 kV concerning all gas-filled compartments. The enclosures comprise parts of electrical equipment not necessarily limited to the following examples: – circuit-breakers; – switch-disconnectors; – disconnectors; – earthing switches; – current transformers; – voltage transformers; – surge arrestors; – busbars and connections; – etc. The scope also covers enclosures of pressurized components such as the centre chamber of live tank switchgear, gas-insulated current transformers, etc.

PDF Catalog

PDF Pages PDF Title
1 compares BS EN 50068:2018
2 TRACKED CHANGES
Text example 1 — indicates added text (in green)
91 undefined
97 1 Scope
2 Normative references
98 3 Terms and definitions
100 4 Quality assurance
5 Normal and special service conditions
101 6 Materials
7 Design
7.1 General
7.2 Calculation methods
7.2.1 General
102 7.2.2 Evaluation of mechanical strength using “Design by Formula”
7.2.3 Evaluation of mechanical strength using “Design by Analysis”
7.2.3.1 Normal loads
103 7.2.3.2 Exceptional loads
7.2.4 Evaluation of mechanical strength using “Design by Burst test”
7.2.4.1 General
104 7.2.4.2 Burst test procedure
7.2.4.3 Strain measurement test procedure
105 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
106 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
107 8.7 Assembly for welding
8.8 General welding requirements
8.9 Preheating
8.10 Surface finish
9 Repair of welding defects
108 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
109 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
110 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
111 10.5.4 Marking of the enclosure welds
10.5.5 Reporting
10.5.6 Minimum acceptance levels
10.5.7 Assessment of imperfections
113 10.6 Design specification, drawings and data sheets
10.7 Certificate
10.8 Stamping
10.9 Final inspection
114 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
116 Annex A(informative)A-deviations

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BS EN 50068:2018 - TC
$186.33