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BS EN IEC 60076-22-7:2020 2023

BS EN IEC 60076-22-7:2020 2023

$198.66

Power transformers – Power transformer and reactor fittings. Accessories and fittings

Published By Publication Date Number of Pages
BSI 2023 70
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PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
11 FOREWORD
13 1 Scope
2 Normative references
14 3 Terms and definitions
15 4 Service conditions
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
6.1 Thermometer pockets
6.1.1 General
16 6.1.2 Identification and nameplate
6.1.3 Test
6.1.4 Dimensions of thermometer pockets
Figures
Figure 1 – Thermometer pocket with female (left) and male (right) thread
17 6.2 Earthing terminal
6.2.1 General
6.2.2 Dimensions of different earth terminals
Tables
Table 1 – Preferred dimensions for thermometer pockets
18 Figure 2 – Earth terminal type B1
Figure 3 – Earth terminal type B2
Figure 4 – Earth terminal type B3
19 Figure 5 – Earth terminal type B4
Figure 6 – Earth terminal type B5
Figure 7 – Earth terminal type B6
20 6.3 Draining plug
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
21 Figure 9 – Draining plug type C1 (bolted type)
Figure 10 – Draining plug type C2
22 6.4 Air vent and liquid draining device
6.4.1 General
6.4.2 Materials
Figure 11 – Draining device type C3
Table 3 – Dimensions of draining plug type C2
23 6.4.3 Dimensions of different devices
6.5 Wheel assembly – General requirements
6.6 Dehydrating breathers
6.6.1 General
Figure 12 – Air venting and liquid draining type D1 (M6) and D2 (M12)
24 6.6.2 Common requirements
6.6.3 Additional requirements for conventional manual replacement types
25 Figure 13 – Breather connecting flanges
26 Figure 14 – Overall dimensions
Table 4 – Typical size classes of breathers
27 6.6.4 Additional aspects for self-regenerating types
29 Table 5 – Making and breaking capacity – Self regenerating breather
Table 6 – Dielectric strength of switches – Power frequency
Table 7 – Dielectric strength of switches – Impulse
30 6.6.5 Tests
31 6.7 Butterfly valves
6.7.1 General
6.7.2 Requirements and characteristics
6.7.3 Valve components
32 6.7.4 Assembly arrangements and dimensions
33 6.7.5 Performances
34 6.7.6 Tests
Table 8 – Maximum admissible leakage value
35 6.7.7 Supply conditions
6.8 Junction terminal boxes
6.8.1 General
6.8.2 Degree of protection
6.8.3 Function of the junction terminal box
6.8.4 General construction
36 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
37 6.8.9 Tests
38 6.9 Sampling device
6.9.1 General
6.9.2 Requirements and characteristics
39 Figure 15 – Sampling device NF C 51-123
Table 9 – Dimensions of sampling device in Figure 15
40 6.9.3 Tests
Figure 16 – Sampling device DIN 42568
Table 10 – Dimensions of sampling device in Figure 16
42 Annex A (informative) Earthing pad current capacity calculation
A.1 Theory
43 A.2 Application to earthing pads
44 Table A.1 – Material data for current capacity calculation
Table A.2 – Maximum permissible current for standard earthing pads, during 0,5 s
45 Annex B (informative) Wheel assembly
B.1 Introduction to wheel selection
B.2 Theory of contact
B.2.1 Maximum load
Figure B.1 – Contact surface between a wheel and a plane
46 B.2.2 Traction force
Figure B.2 – Traction force
47 B.3 Wheel dimensions and gauges
B.3.1 Pitch and gauge
B.3.2 Non-flanged wheel
Figure B.3 – Pitch and gauge
48 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
49 B.3.3 Flanged wheel
Figure B.6 – Vignole type rail profile
Table B.2 – Wheel W1 pitches
50 Figure B.7 – Burbach rail profile
Figure B.8 – Wheel and rail positions
Table B.3 – Rail resting surface
51 Figure B.9 – Single wheel flanged type W2
Figure B.10 – Example of round shape wheel profile
Table B.4 – Flanged single wheel dimensions
52 Figure B.11 – Double wheel flanged type W3
Figure B.12 – Cross side track
Table B.5 – Flanged double wheel dimensions
53 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
54 Figure B.15 – Parallel double tracks
Table B.8 – Rail gauges for concentric tracks
Table B.9 – Rail gauges for parallel tracks
55 Annex C (informative) Sizing of conventional types of dehydrating breather – Guide for calculation of breather size
56 Table C.1 – Mass of water, in grams, contained in one cubic metre of air
57 Annex D (normative) Butterfly valve types
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
58 Figure D.2 – Butterfly valves, type A1, A2 and A3
Table D.1 – Dimensions of butterfly valves, types A1, A2 and A3
59 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
60 Figure D.5 – Butterfly valves, type B1
Table D.2 – Dimensions of butterfly valves, type B1
61 Figure D.6 – Butterfly valves, type B2
Table D.3 – Dimensions of butterfly valves, type B2
62 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
63 Figure D.8 – Butterfly valves, type C1
Table D.4 – Dimensions of butterfly valves type C1
64 Figure D.9 – Butterfly valves, type C2
Table D.5 – Dimensions of butterfly valves, type C2
65 Annex E (normative) Gaskets and gasket seats
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
66 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
67 Annex F (informative) Terminal boxes – Preferred mounting dimensions
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
68 Bibliography

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BS EN IEC 60076-22-7:2020 2023
$198.66