DL/T 5221-2016 城市电力电缆线路设计技术规定：英文 - 工标库
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DL/T 5221-2016 城市电力电缆线路设计技术规定：英文现行
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Introduction
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翻译出版说明
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National Energy Administration Announcement
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Foreword
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1 General Provisions
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2 Terms
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3 Cable Route
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4 Cable Laying
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4.1 General Requirements
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4.2 Selection of Cable Laying Mode
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4.3 Direct Burying
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4.4 Cable Duct Laying
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4.5 Cable Tunnel Laying
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4.6 Cable Trough Laying
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4.7 Bridge Laying
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4.8 Underwater Laying
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4.9 Vertical Laying
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4.10 Cable Termination Poles/Towers
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4.11 Cable Termination Station
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5 Selection of Cable Construction
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5.1 General Requirements
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5.2 Selection of Insulation Screen，Metal Sheaths，Armors and Outer Sheaths
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5.3 Cable Conductors
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6 Selection and Configuration of Cable Accessories
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6.1 General Requirements
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6.2 Types of Cable Terminations and Joints
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6.3 Structures and Types of Cable Terminations and Joints
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6.4 Cable Terminations Supports
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6.5 Overvoltage Protection
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7 Grounding of Metal Sheath or Shield Layer
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8 Cable Supports and Cleats
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9 Fire Fighting Design of Cables
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9.1 General Requirements
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9.2 Selection of Flame Retardant Cables
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9.3 Fire Fighting Design of Cable Raceway and Cable Interlayer of Substations
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9.4 Fire Fighting Design of Cable Tunnel，Cable Trough and Cable Shaft
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10 Design of Oil Supply System of Selfcontained Oil-filled Cable
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11 Environmental Protection
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Appendix A Calculation of the Pulling Force and the Side Wall Pressure
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Appendix B Calculation of the Length of Cable Duct Working Shaft
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Appendix C Lateral Displacement，Thermal Expansion and Contraction and Axial Force of Snake Laying
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C.1 Calculation of Lateral Displacement of Snake Laying
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C.2 Calculation Formula of Thermal Expansion and Contraction
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C.3 Calculation Formula of Axial Force of Snaking Arc
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C.4 Calculation of the Number and Installation Positions of Cleats Needed for Vertical Laying of Cables
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Appendix D Chemical Stability of the Plastic Sheath
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Appendix E Correction Factors of Permissible Continuous Ampacity of Cables Under Different Laying Conditions
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Appendix F Average Ground Temperature of Representative Cities in August
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Appendix G Calculation of the Oil Demand and Transient Oil Pressure for Oil-filled Cables
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G.1 Calculation of the Oil Demand for Oil-filled Cables
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G.2 Calculation of Transient Oil Pressure
