PDF《电力工程电缆设计规范》

UDC 中华人民共和国国家标准 P GB 50217―20XX 电力工程电缆设计规范 Code for design of cables of electric power engineering (征求意见稿) 20XX-XX-XX 发布 20XX-XX-XX 实施 中华人民共和国住房和城乡建设部中华人民共和国国家质量监督检验检疫总局 联合发布 中华人民共和国国家标准 电力工程电缆设计规范 Code for design of cables of electric power engineering GB 50217―20XX (征求意见稿) 主编部门: 批准部门: 施行日期: XXXXXXX 出版社 20XX 年北京I目次前言I? 1? 总则1? 2? 术语2? 3? 电缆型式与截面选择 5? 3.

1? 电缆导体材质.5? 3.2? 电缆绝缘水平.5? 3.3? 电缆绝缘类型.6? 3.4? 电缆护层类型.7? 3.5? 电力电缆芯数.9? 3.6? 电力电缆导体截面.11? 3.7? 控制电缆及其金属屏蔽.15? 4? 电缆附件及附属设备的选择与配置 18? 4.1? 一般规定.18? 4.2? 自容式充油电缆的供油系统.24? 5? 电缆敷设26? 5.1? 一般规定.26? 5.2? 敷设方式选择.29? 5.3? 地下直埋敷设.31? 5.4? 保护管敷设.33? 5.5? 电缆沟敷设.34? 5.6? 电缆隧道敷设.36? 5.7? 电缆夹层敷设.38? 5.8? 电缆竖井敷设.38? 5.9? 其他公用设施中敷设.39? 5.10? 水下敷设.40? 6? 电缆的支持与固定 42? 6.1? 一般规定.42? II 6.2? 电缆支架和桥架.44? 7? 电缆防火与阻止延燃 46? 附录 A 常用电力电缆导体的最高允许温度.51? 附录 B 10kV 及以下电力电缆经济电流截面选用方法.52? 附录 C 10kV 及以下常用电力电缆允许 100%持续载流量.55? 附录 D 敷设条件不同时电缆允许持续载流量的校正系数.62? 附录 E 按短路热稳定条件计算电缆导体允许最小截面的方法.64? 附录 F 交流系统单芯电缆金属层正常感应电势算式.67? 附录 G 35kV 及以下电缆敷设度量时的附加长度.68? 附录 H 电缆穿管敷设时容许最大管长的计算方法.69? 本规范用词说明.71? 引用标准目录.72? 附:条文说明.74? III Contents

1 General provisions

1 2 Terms…2

3 Selection of cable type and cross -section…5. 3.1 Material of cable conductor…5 3.2 Cable insulation level…5. 3.3 Type of cable insulation…6 3.4 Type of external sheath of cable…7 3.5 Number of power cable cores…9 3.6 Cross-section of power cable conductor…11 3.7 Control cable and metal shielding…15

4 Selection and configuration for cable accessories and accessorial devices …….….18 4.1 General requirements…18 4.2 Oil supply system of self-contained oil-filled cable…24

5 Cable laying…26 5.1 General requirements…26 5.2 Selection of laying mode…29 5.3 Underground directly burying…31 5.4 Cable laying in protection conduits…33 5.5 Cable laying in cable trench…34 5.6 Cable laying in cable thunel…36 5.7 Cable laying in cable corridor…38 5.8 Cable laying in cable shaft…38 5.9 Cable laying in other utilities…39 5.10 Underwater cable laying…40

6 Cable supports and fixings…42 6.1 General requirements…42 6.2 Cable supports and trays…44

7 Fire prevention and retardation of cables…46 Appendix A Maximum allowable temperature of common power cable conductor…51 Appendix B Selection methods for economic current cross-section of power cable rated 10kV and below…52 Appendix C Allowable 100% continuous ampacity of common power cable rated 10kV and below…55 IV Appendix D Correction factors of allowable continuous ampacity of cables under different laying conditions…62 Appendix E Methods for calculation of allowable minimum cross-section of cable conductor based on the short-ciruit thermal stability conditions……….64 Appendix F Calculation formula of normal induced potential of metallic layer of single-core cables of AC system…67 Appendix G Additional length of cables rated 35kV and below during laying measurement…68 Appendix H Calculation methods for maximum allowable length of conduits in case of putting cables through conduits…69 Explanation of wording in this code…71 List of quoted standards…72 Addition: Explanation of provisions I 前言本规范是根据住房和城乡建设部