GB 50545-2010 PDF EnglishUS$145.00 · In stock · Download in 9 seconds
GB 50545-2010: Code for design of 110kV~750kV overhead transmission line Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB 50545-2010: Code for design of 110kV~750kV overhead transmission line---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB50545-2010NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA P GB 50545-2010 Code for Design of 110kV~750kV Overhead Transmission Line Issued on: JANUARY 18, 2010 Implemented on: JULY 01, 2010 Jointly issued by. Ministry of Housing and Urban-rural Development; General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China. GB Table of Contents1 General Provisions ... 1 2 Terms and Symbols ... 1 2.1 Terms ... 1 2.2 Symbols ... 2 3 Routing ... 4 4 Meteorological Conditions ... 5 5 Conductor and Earthwire... 7 6 Insulators and Fittings ... 10 7 Insulation Coordination, Lightning Protection and Grounding...11 8 Conductor Arrangement ... 16 9 Tower Type ... 17 10 Tower Load and Material ... 18 10.1 Tower Load... 18 10.2 Structural Material ... 24 11 Tower Structure ... 26 11.1 General Calculating Stipulation ... 26 11.2 Ultimate State Expression for Carrying Capacity and Serviceability ... 27 11.3 General Stipulation for Structure ... 28 12 Foundations ... 29 13 Ground Clearance and Crossing... 31 14 Environmental Protection... 38 15 Labor Safety and Industrial Sanitation ... 38 16 Accessories ... 39 Appendix A Typical Meteorological Area ... 40 Appendix B Classification of Overhead Line Pollution... 41 Appendix C Reference Value of m1 for Different Insulator Type... 42 Appendix D Horizontal Distance between Phases Depending on Span for Suspension Tower ... 44 Appendix E Calculating Density and Cone Angle of Soil for Uplift Foundation ... 45 Appendix F Classification of Telecommunication Line ... 46 Appendix G Classification of Road... 47 Explanation of Wording in this Code... 48 List of Quoted Standards ... 49 vi 11 General Provisions 1.0.1 In order to implement national capital construction policy and technical economy policy during the design of AC 110kV~750kV overhead transmission line, achieve safety and reliability, advanced application, economy and rationality, resource conservation and friendly environment, this code is formulated. 1.0.2 This code is applicable to the design of AC 110kV~750kV overhead transmission line; thereinto, AC 110kV~500kV is applicable to the design of single loop, same tower and double loop as well as same tower multiple loop transmission line; AC 750kV is applicable to the design of single loop transmission line. 1.0.3 The design of overhead transmission line shall start from practice, combine local characteristic, positively adopt new technique, new process, new equipment and new material, popularize and adopt advanced technology and product with energy conservation and consumption reduction as well as environmental protection. 1.0.4 As for important line and special section line, the proper strengthening measures should be adopted to improve security level of line. 1.0.5 This code specifies basic requirements of design of 110kV~750kV overhead transmission line; if this code interferes with specifications in national laws, administrative regulations, the national laws and administrative regulations shall be conformed to. 1.0.6 the design of overhead transmission line shall not only meet those specified in this code, but also comply with those specified in the national current relevant standards.2 Terms and Symbols2.1 Terms 2.1.1 Overhead transmission line It refers to the power line in which the insulator and tower are used to set the conductor above the ground. 2.1.2 Telecommunication line It refers to the communication line of various electrical signals. 2.1.3 Large crossing It refers to the section that the conductor selection or tower design needs special consideration owing to larger span (above 1000m) or higher tower (above 100m) when line crossing navigation river, lake or strait and has a strong impact on navigation or especially difficult repair during fault. 2.1.4 Light/medium/heavy icing area The area with design ice coating thickness equal to 10mm and below is light icing area; the area with design ice coating thickness larger than 10mm and less than 20mm is medium icing area; the area with design ice coating thickness equal to 20mm and above is heavy icing area 2.1.5 Reference wind speed βc——the adjustment coefficient of wind load of conductor and earthwire; βz——the adjustment coefficient of wind load of tower; μs——the shape coefficient of member; μsc——the shape coefficient of conductor or earthwire; μz——the altitude variation coefficient of wind pressure; ψ——the combination coefficient of variable load; ψWE——the combination coefficient of wind load in seismic fundamental combination γo——the significance coefficient of tower structure; γEh——the partial coefficient of horizontal seismic action; γEV——the partial coefficient of vertical seismic action; γEQ——the partial coefficient of colligation of variable load of conductor and earthwire tension γG——the partial coefficient of the permanent load; γQi——the partial coefficient of i th variable load; γrf——the adjustment coefficient of foundation bearing capacity; γRE——the seismic adjustment factor of bearing force; γf——the additional partial coefficient of foundation 2.2.4 Geometric parameters AI——the calculated value of area of insulator string bearing wind pressure; AS——the calculated value of projected area of member bearing wind pressure; D——the horizontal spacing of conductors; Dp——the horizontal projection distance between conductors; Dx——the equivalent horizontal spacing of cam arrangement of conductor; Dz——the vertical projection distance between conductors; d——the external diameter of conductor or earthwire or calculated external diameter of ice coating; the divided conductor shall be adopted with the sum of external diameter of all subconductors; fc——the maximum sag of conductor; H——the absolute altitude; L——the span Lk——the length of link suspension insulator; Lo1——the geometrical creepage distance of single suspension insulator; Lp——the horizontal span of tower; S——the distance between conductor and earthwire; θ——the included angle between wind direction and conductor or earthwire direction; γk——the standard value of geometric parameter3 Routing3.0.1 The routing should be adopted with new technology as satellite photo, aerial photo, digital photogrammetry system and infrared measurement; if necessary, the geologic remote sensing technology should be adopted in complex geologic condition region; such factors as line length, topography and landform, geology, icing area, communication, construction, operation and local planning shall be comprehensively considered; the technical economical comparison of multiple schemes shall be carried out to achieve safety and reliability, friendly environment and economy and rationality. 3.0.2 The routing shall keep clear of military installation, large industrial and mining enterprises and critical facilities and shall meet the urban planning. 3.0.3 The routing should keep clear of poor geologic area and mining affected area; if it is... ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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