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BS EN IEC 60076-22-7:2020 Power transformers - Power transformer and reactor fittings. Accessories and fittings, 2023
- undefined
- Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
- English [Go to Page]
- CONTENTS
- FOREWORD
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Service conditions [Go to Page]
- 4.1 General
- 4.2 Corrosion protection
- 4.3 Resistance to ambient conditions
- 4.4 Insulating liquid characteristics
- 5 General requirements for routine and type test
- 6 Accessories and fittings [Go to Page]
- 6.1 Thermometer pockets [Go to Page]
- 6.1.1 General
- 6.1.2 Identification and nameplate
- 6.1.3 Test
- 6.1.4 Dimensions of thermometer pockets
- Figures [Go to Page]
- Figure 1 – Thermometer pocket with female (left) and male (right) thread
- 6.2 Earthing terminal [Go to Page]
- 6.2.1 General
- 6.2.2 Dimensions of different earth terminals
- Tables [Go to Page]
- Table 1 – Preferred dimensions for thermometer pockets
- Figure 2 – Earth terminal type B1
- Figure 3 – Earth terminal type B2
- Figure 4 – Earth terminal type B3
- Figure 5 – Earth terminal type B4
- Figure 6 – Earth terminal type B5
- Figure 7 – Earth terminal type B6
- 6.3 Draining plug [Go to Page]
- 6.3.1 General
- 6.3.2 Materials
- 6.3.3 Dimensions of different devices
- Figure 8 – Earth terminal type B7
- Table 2 – Maximum current for earth terminals
- Figure 9 – Draining plug type C1 (bolted type)
- Figure 10 – Draining plug type C2
- 6.4 Air vent and liquid draining device [Go to Page]
- 6.4.1 General
- 6.4.2 Materials
- Figure 11 – Draining device type C3
- Table 3 – Dimensions of draining plug type C2 [Go to Page]
- 6.4.3 Dimensions of different devices
- 6.5 Wheel assembly – General requirements
- 6.6 Dehydrating breathers [Go to Page]
- 6.6.1 General
- Figure 12 – Air venting and liquid draining type D1 (M6) and D2 (M12) [Go to Page]
- 6.6.2 Common requirements
- 6.6.3 Additional requirements for conventional manual replacement types
- Figure 13 – Breather connecting flanges
- Figure 14 – Overall dimensions
- Table 4 – Typical size classes of breathers [Go to Page]
- 6.6.4 Additional aspects for self-regenerating types
- Table 5 – Making and breaking capacity – Self regenerating breather
- Table 6 – Dielectric strength of switches – Power frequency
- Table 7 – Dielectric strength of switches – Impulse [Go to Page]
- 6.6.5 Tests
- 6.7 Butterfly valves [Go to Page]
- 6.7.1 General
- 6.7.2 Requirements and characteristics
- 6.7.3 Valve components
- 6.7.4 Assembly arrangements and dimensions
- 6.7.5 Performances
- 6.7.6 Tests
- Table 8 – Maximum admissible leakage value [Go to Page]
- 6.7.7 Supply conditions
- 6.8 Junction terminal boxes [Go to Page]
- 6.8.1 General
- 6.8.2 Degree of protection
- 6.8.3 Function of the junction terminal box
- 6.8.4 General construction
- 6.8.5 Overall dimensions
- 6.8.6 Preferred functional and manufacturing characteristics of the box
- 6.8.7 Preferred functional and manufacturing characteristics of the terminals
- 6.8.8 Performance
- 6.8.9 Tests
- 6.9 Sampling device [Go to Page]
- 6.9.1 General
- 6.9.2 Requirements and characteristics
- Figure 15 – Sampling device NF C 51-123
- Table 9 – Dimensions of sampling device in Figure 15 [Go to Page]
- 6.9.3 Tests
- Figure 16 – Sampling device DIN 42568
- Table 10 – Dimensions of sampling device in Figure 16
- Annex A (informative) Earthing pad current capacity calculation [Go to Page]
- A.1 Theory
- A.2 Application to earthing pads
- Table A.1 – Material data for current capacity calculation
- Table A.2 – Maximum permissible current for standard earthing pads, during 0,5 s
- Annex B (informative) Wheel assembly [Go to Page]
- B.1 Introduction to wheel selection
- B.2 Theory of contact [Go to Page]
- B.2.1 Maximum load
- Figure B.1 – Contact surface between a wheel and a plane [Go to Page]
- B.2.2 Traction force
- Figure B.2 – Traction force
- B.3 Wheel dimensions and gauges [Go to Page]
- B.3.1 Pitch and gauge
- B.3.2 Non-flanged wheel
- Figure B.3 – Pitch and gauge
- Figure B.4 – Non-flanged wheel assembly type W1
- Figure B.5 – Wheel assembly type W1, top view of longitudinal and cross pitch
- Table B.1 – W1 wheel assembly dimensions [Go to Page]
- B.3.3 Flanged wheel
- Figure B.6 – Vignole type rail profile
- Table B.2 – Wheel W1 pitches
- Figure B.7 – Burbach rail profile
- Figure B.8 – Wheel and rail positions
- Table B.3 – Rail resting surface
- Figure B.9 – Single wheel flanged type W2
- Figure B.10 – Example of round shape wheel profile
- Table B.4 – Flanged single wheel dimensions
- Figure B.11 – Double wheel flanged type W3
- Figure B.12 – Cross side track
- Table B.5 – Flanged double wheel dimensions
- Figure B.13 – Single side track
- Figure B.14 – Concentric double tracks
- Table B.6 – Rail gauge for cross side track
- Table B.7 – Rail gauges for single track
- Figure B.15 – Parallel double tracks
- Table B.8 – Rail gauges for concentric tracks
- Table B.9 – Rail gauges for parallel tracks
- Annex C (informative) Sizing of conventional types of dehydrating breather – Guide for calculation of breather size [Go to Page]
- Table C.1 – Mass of water, in grams, contained in one cubic metre of air
- Annex D (normative) Butterfly valve types [Go to Page]
- D.1 Butterfly valve types A1, A2 and A3 assembled by welding on tank wall
- Figure D.1 – Assembly layout of butterfly valves, type A1, A2 and A3
- Figure D.2 – Butterfly valves, type A1, A2 and A3
- Table D.1 – Dimensions of butterfly valves, types A1, A2 and A3
- D.2 Butterfly valve types B1 and B2 assembled between tank wall and pipeline and on pipeline
- Figure D.3 – Assembly layout of butterfly valves type B1 and B2 between tank wall and pipeline
- Figure D.4 – Assembly layout of butterfly valves type B1 and B2 on pipeline
- Figure D.5 – Butterfly valves, type B1
- Table D.2 – Dimensions of butterfly valves, type B1
- Figure D.6 – Butterfly valves, type B2
- Table D.3 – Dimensions of butterfly valves, type B2
- D.3 Butterfly valves types C1 and C2 assembled on pipeline
- Figure D.7 – Assembly layout of butterfly valves type C1 and C2 on pipeline
- Figure D.8 – Butterfly valves, type C1
- Table D.4 – Dimensions of butterfly valves type C1
- Figure D.9 – Butterfly valves, type C2
- Table D.5 – Dimensions of butterfly valves, type C2
- Annex E (normative) Gaskets and gasket seats [Go to Page]
- E.1 General
- E.2 Gasket seats and gaskets for butterfly valve types A1, A2, A3, C1 and C2
- Table E.1 – Gasket seat dimensions and gasket types and dimensions for butterfly valves types A1, A2, A3, C1 and C2
- E.3 Gasket seats and gaskets for butterfly valve types B1 and B2
- Table E.2 – Gasket seats dimensions and gasket types and dimensions for butterfly valves types B1 and B2
- Annex F (informative) Terminal boxes – Preferred mounting dimensions [Go to Page]
- Figure F.1 – Dimensions of terminal boxes size A, B, C and D
- Table F.1 – Dimensions of terminal boxes size A, B, C and D
- Bibliography [Go to Page]