GB电气装置安装工程电缆线路施工及验收规范

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中华人民共和国国家标准电气装置安装工程接地装置施工及验收规范

中华人民共和国国家标准电气装置安装工程接地装置施工及验收规范

中华人民共和国国家标准电气装置安装工程接地装置施工及验收规范GB50169-92中华人民共和国国家标准电气装置安装工程接地装置施工及验收规范GB50169—92主编部门:中华人民共和国能源部批准部门:中华人民共和国建设部施行日期:1993年7月1日关于发布国家标准《电气装置安装工程旋转电机施工及验收规范》等五项国家标准的通知建标〔1992〕911号根据国家计委计标函(1987)78号、建设部(88)建标字25号文的要求,由能源部会同有关部门共同制订的《电气装置安装工程旋转电机施工及验收规范》等五项标准,已经有关部门会审,现批准《电气装置安装工程旋转电机施工及验收规范》GB50170-92、《电气装置安装工程盘、柜及二次回路结线施工及验收规范》GB50171-92、《电气装置安装工程蓄电池施工及验收规范》GB50172-92、《电气装置安装工程电缆线路施工及验收规范》GB50168-92和《电气装置安装工程接地装置施工及验收规范》GB50169-92为强制性国家标准,自一九九三年七月一日起施行。

原《电气装置安装工程施工及验收规范》中第三篇旋转电机篇、第四篇盘、柜及二次回路结线篇、第五篇蓄电池篇、第十一篇电缆线路篇及第十五篇接地装置篇同时废止。

本标准由能源部负责管理,具体解释等工作由能源部电力建设研究所负责,出版发行由建设部标准定额研究所负责组织。

中华人民共和国建设部一九九二年十二月十六日修订说明本规范是根据国家计委计标函(1987)78号、建设部(88)建标字25号文的要求,由原水利电力部负责主编,具体由能源部电力建设研究所会同有关单位共同编制而成。

在修订过程中,规范组进行了广泛的调查研究,认真总结了原规范执行以来的经验,吸取了部分科研成果,广泛征求了全国有关单位的意见,最后由我部会同有关部门审查定稿。

本规范共分三章和二个附录。

这次修订的主要内容有:增加新型设备的接地规定,接地干线涂色标志采用IEC标准同国标一致,对接地装置施工防腐问题、焊接质量要求作了修订,对土壤腐蚀性分级定量和化学降阻剂使用上作了规定。

10kv电缆线路工程验收标准

10kv电缆线路工程验收标准

10kv电缆线路工程验收标准验收对象文档编号验收模块10kv电缆线路设备型号运行编号验收人员验收时间序号验收过程中的危险点控制措施备注1 触电、误触碰带电设备核对线路图纸,确认设备名称,不触碰电气设备,并保持安全距离2 沟井盖板夹伤要有自我保护意识,正确使用沟井盖板开启工具序号验收项目及标准验收记录依据备注1 电缆安装应符合设计图纸要求GB 50168—922 电缆型号、规格应符合设计要求3 缆管、支架3.1 电缆管不应有穿孔、裂缝和显著的凹凸不平GB 50168—923.2 电缆管内壁应光滑3.3 电缆管在弯制后,不应有裂缝和显著的凹瘪现象3.4 电缆管的弯曲半径不得小于所穿入电缆的最小允许弯曲半径3.5 电缆支架应安装牢固,横平竖直,无明显扭曲3.6 支架应焊接牢固,无显著变形3.7 电缆支架全长应有良好的接地,接地电阻不应大于10Ω4 电缆沟、管道4.1 电缆与管道、道路、构筑物等相互间容许最小距离应满足要求GB 50168—924.2 电缆沟(管)的拐角半径应满足电缆允许弯曲半径的要求4.3 盖板采用预制(按设计要求分别承受力10·20t)4.4 盖板表面要光滑、整齐,配有“电力”标志4.5 电缆沟沟壁、盖板及其材质构成,应满足可能承受负载和适应环境耐久的要求4.6 可开启的沟盖板的单块重量不宜超过50kg 4.7 电缆沟(管)要做到防火、防渗水 4.8 电缆沟(管)排水设施应完好 4.9 电缆沟(管)通道应畅通5 电缆敷设5.1 电缆型号、电压、规格应符合设计要求 GB 50168—92《电气装置安装工程电缆线路施工及验收规范》5.2 电力敷设时,不应损坏电缆沟、隧道、电缆井和人井的防水层5.3电缆各支持点间的距离:水平敷设800mm ;垂直敷设1500mm5.4电缆的最小弯曲半径应符合要求,即交联聚乙烯绝缘电力电缆:多芯:15D ,单芯:20:20D (D 为电缆外径)5.5 电缆上不得有铠装压扁、电缆绞拧、护层折裂等未消除的机械损伤5.6电缆敷设时应排列整齐,不宜交叉,并加以固定5.7在电缆终端头、电缆接头、拐弯处、夹层内、隧道及竖井的两端及每隔50m 、人井内等地方,电缆上应装设标志牌5.8电缆路径标志应与实际相符,路径标志应清晰、牢固、间距适当5.9电缆进入电缆沟、隧道、竖井、建筑物、盘(柜)以及穿入管子时,出入口应封闭,管口应密封5.10 电缆应有一定机械强度的保护管或加装保护罩6电缆终端头和接头6.1电力电缆接地线应采用铜绞线或镀锡铜编织线,其截面面积不应小于以下规定值:电缆截面120mm 2及以下时,接地截面16mm 2;电缆截面150mm 2及以上时,接地截面25mm 2GB 50168—92《电气装置安装工程电缆线路施工及验收规范》6.2电缆终端盒接头应采取加强绝缘、密封防潮、机械保护等措施6.3三芯电力电缆接头两侧电缆的金属屏蔽层(或金属套)、铠装层应分别连接良好,不得中断6.4跨接线的截面不应小于本规范接地线截面的规定6.5 终端的铠装层和铜屏蔽层应分别用带绝缘的胶合导线单独引出接地线,铜屏蔽层接地线的截面不得小于25mm2,铠装层接地线的截面不应小于16mm26.6 装配、组合电缆终端盒接头时,各部件间的配合或搭接处必须采用堵漏、防潮和密封措施6.7 电缆终端上应有明显的相色标志,且应与系统的相位一致7防火与阻燃7.1在电缆穿过坚井、墙壁、楼板或进入电气盘、柜的孔洞处,用防火堵料密实封堵GB 50168—92《电气装置安装工程电缆线路施工及验收规范》7.2 在封堵电缆孔洞时,封堵应严实可靠、不应有明显的裂缝和可见的孔隙,孔洞较大者应加耐火衬板后再进行封堵7.3 在电力电缆接头两侧及相邻电缆2~3m长的区段,施加防火涂料或防火包带7.4 两端应设绝缘子固定,绝缘子安装应防止瓷裙积水7.5 采用绝缘线时,外露部位应进行绝缘处理7.6 遇有铜铝连接时,应有过渡措施7.7 进户线支持物应牢固7.8 在最大摆动时,不应有接触树木和其他建筑物现象7.9 不应从高压引线间穿过和跨越铁路7.10 不应有两个不同电源引入的接户线同杆架设7.11 绑扎固定应符合规范要求1.验收情况汇总表序号设备类型存在问题解决方法处理情况反馈1 变压器2 互感器3 开关设备4 支柱绝缘子和悬式绝缘子5 电力电缆线路6 电容器7 避雷器8 接地装置2.验收报告验收对象文档编号验收模块验收时间验收人员工程验收报告3.专业缺陷验收总结验收对象文档编号验收模块验收时间验收人员序号设备名称验收缺陷记录处理意见处理情况及日期4.验收总结(未消除缺陷汇总)验收对象文档编号验收模块验收时间验收人员序号设备名称验收缺陷记录处理意见处理情况及日期5.交接与签证验收对象文档编号验收模块验收时间验收人员6.运行准备及启动(启动前运行准备)验收对象文档编号验收模块设备型号运行编号验收人员验收时间危险点分析序号验收过程中的危险点控制措施备注1 现场情况不清,误触碰设备验收前与运行人员开工会,交代安全注意事项必须与施工人员、运行值班人员充分沟通,明确带电设备部位2 人员触电伤害禁止攀爬设备,注意保持与带电设备足够的安全距离,500KV大于5m;220KV 大于3m;110KV大于1.5m;35KV大于1m;10KV大于0.7m;序号验收项目及标准验收记录依据备注1 设备台帐2 运行工作记录薄3 设备资料档案4 工器具及备品备件5 运行规程、规定及导则6 其他。

GB50258-电气装置安装工程1KV及以下配线工程项目施工验收标准规范

GB50258-电气装置安装工程1KV及以下配线工程项目施工验收标准规范

1 总则1.0.1 为保证电气装置配线工程的施工质量,促进技术进步,确保安全运行,制订本规范。

1.0.2 本规范适用于建筑物、构筑物中1kV 及以下配线工程的施工及验收。

1.0.3 配线工程的施工应按已批准的设计进行。

当修改设计时,应经原设计单位同意,方可进行。

1.0.4 采用的器材及其运输和保管,应符合国家现行标准的有关规定;当产品有特殊要求时,尚应符合产品技术文件的规定。

1.0.5 器材到达施工现场后,应按下列要求进行检查:1.0.5.1 技术文件应齐全。

1.0.5.2 型号、规格及外观质量应符合设计要求和本规范的规定。

1.0.6 配线工程施工中的安全技术措施,应符合本规范和国家现行标准及产品技术文件的规定。

1.0.7 配线工程施工前,建筑工程应符合下列要求:1.0.7.1 对配线工程施工有影响的模板、脚手架等应拆除,杂物应清除。

1.0.7.2 对配线工程会造成污损的建筑装修工作应全部结束。

1.0.7.3 在埋有电线保护管的大型设备基础模板上,应标有测量电线保护管引出口座标和高程用的基准点或基准线。

1.0.7.4 埋入建筑物、构筑物内的电线保护管、支架、螺栓等预埋件,应在建筑工程施工时预埋。

1.0.7.5 预留孔、预埋件的位置和尺寸应符合设计要求,预埋件应埋设牢固。

1.0.8 配线工程施工结束后,应将施工中造成的建筑物、构筑物的孔、洞、沟、槽等修补完整。

1.0.9 电气线路经过建筑物、构筑物的沉降缝或伸缩缝处,应装设两端固定的补偿装置,导线应留有余量。

1.0.10 电气线路沿发热体表面上敷设时,与发热体表面的距离应符合设计规定。

1.0.11 电气线路与管道间的最小距离,应符合本规范附录 A 的规定。

1.0.12 配线工程采用的管卡、支架、吊钩、拉环和盒(箱)等黑色金属附件,均应镀锌或涂防腐漆。

1.0.13 配线工程中非带电金属部分的接地和接零应可靠。

1.0.14 配线工程的施工及验收,除应符合本规范的规定外,尚应符合国家现行的有关标准规范的规定。

GB50171_92电气装置安装工程盘、柜和二次回路结线施工和验收规范标准[详]

GB50171_92电气装置安装工程盘、柜和二次回路结线施工和验收规范标准[详]

电气装置安装工程盘、柜及二次回路结线施工及验收规范GB50171-92主编部门:中华人民共和国能源部批准部门:中华人民共和国建设部施行日期:1993年7月1日关于发布国家标准《电气装置安装工程旋转电机施工及验收规范》等五项国家标准的通知建标[1992]911号根据国家计委计标函(1987)78号、建设部(88)建标字25号文的要求,由能源部会同有关部门共同制订的《电气装置安装工程旋转电机施工及验收规范》等五项标准,已经有关部门会审,现批准《电气装置安装工程旋转电机施工及验收规范》GB50170-92、《电气装置安装工程盘、柜及二次回路结线施工及验收规范》GB50171-92、《电气装置安装工程蓄电池施工及验收规范》GB50172-92、《电气装置安装工程电缆线路施工及验收规范》GB50168-92和《电气装置安装工程接地装置施工及验收规范》GB50169-92为强制性国家标准,自1993年7月1日起施行。

原《电气装置安装工程施工及验收规范》中第三篇旋转电机篇、第四篇盘、柜及二次回路结线篇、第五篇蓄电池篇、第十一篇电缆线路篇及第十五篇接地装置篇同时废止。

本标准由能源部负责管理,具体解释等工作由能源部电力建设研究所负责,出版发行由建设部标准定额研究所负责组织。

中华人民共和国建设部1992年12月修订说明本规范是根据国家计委计标函(1987)78号、建设部(88)建标字25号文的要求,由原水利电力部负责主编,具体由能源部电力建设研究所会同有关单位共同编制而成。

修订过程中,规范组进行了广泛调查研究,认真总结了原规范执行以来的经验,吸取了部分科研成果,广泛征求了全国有关单位的意见,最后由我部会同有关部门审查定稿。

本规范共分五章和一个附录。

这次修订主要增加了弱电回路抗干扰、静态保护和微机监控等方面的内容。

本规范执行过程中,如发现有欠妥之处,请将意见和有关资料直接函寄本规范的管理单位能源部电力建设研究所(北京良乡,邮政编码:102401),以便今后修订时参考。

电气装置安装工程电缆线路施工及验收规范(英文)GB50168-92

电气装置安装工程电缆线路施工及验收规范(英文)GB50168-92

UDC GB中华人民共和国国家标准National Standard of the People’s Republic of China P GB 50168-92电气装置安装工程电缆线路施工及验收规范Code for construction and acceptance of cable levels electric equipment installation engineeringIssued date:12-16-1992 Execution date:07-01-1993Issued Jointly by State Bureau of Technology Supervision Ministry of Construction,PRC中华人民共和国国家标准National Standard of the People’s Republic of China电气装置安装工程电缆线路施工及验收规范Code for construction and acceptance ofcable levels electric equipment installation engineeringGB 50168-92Mainly Preparation by: Ministry of Energy Source of the People’sRepublic of ChinaApproved by: Ministry of Construction of the People’sRepublic of ChinaExecution Date: 07-01-1993Notice on the Issuance of the National standard 《Code for construction and acceptance of the rotating motor in electric equipment installation engineering》JB No. 911 [ 1992 ]According to the requirements of the document of JBH No. 78 (1987) issued by the National Planning Committee and the document of JBZ No. 25 (88), the 5 standards such as 《Code for construction and acceptance of the reeling motor in electric equipment installation engineering》set down by the Energy Source Ministry associated with other departments concerned have been jointly checked up by the concerning authorities. Now the following codes are approved to be applied as compellent national standards: 《Code for construction and acceptance of the reeling motor in electric equipment installation engineering》GB 50170 – 92,《Code for construction and acceptance of the wiring of panel , cabinet and secondary circuit in electric equipment installation engineering》GB 50171 – 92, 《Code for construction and acceptance of the storage battery in electric equipment installation engineering》GB 50172 – 92, 《Code for construction and acceptance of the cable lines in electric equipment installation engineering》GB 50168 –92, 《Code for construction and acceptance of the grounding device in electric equipment installation engineering》GB 50169 – 92. These standards shall be executed from July, 1st 1993 and chapter 3 (reeling motor), chapter 4 (wiring of panel, cabinet and secondary circuit), chapter 5 (storage battery), chapter 11 (cable lines) and chapter 15 (grounding device) in the original《Code of construction and acceptance of electric equipment installation engineering》shall be abolished simultaneously.The Ministry of Energy Source shall take charge of the management of this code, the affairs of specific explanation, etc., shall be charged by the Electric Power Construction Research Institute under the Ministry of Energy Source and the organization of its publishing shall be charged by the Standard Ration Research Institute of the Construction Ministry.Ministry of Constructio n of the People’s Republic of ChinaDecember, 16th, 1992Explanations for the revisionAccording to the requirements of the documents of JBH (1987) No. 78 from the National Planning Committee and (88) JBZ No. 25 from the Construction Ministry, this code was chiefly edited by the Water Conservancy and Electric Power Ministry and specifically edited by the Electric Power Construction Research Institute of the Ministry of Energy Source associated with other departments concerned.During the procedure of emendation, the code emendation group carried out extensive investigation and research work. The group has seriously summarized the experiences achieved during the execution of the original code, adopted part of the achievements of scientific research, extensively solicited the idea from the departments concerned all over the country and finally examined and finalized the text associated with the departments concerned.The Code consists of 8 chapters and 3 annexes and the main content of the amendment includes that the applicable scope of the code has been enlarged; the requirements on construction of the bridge support of cable as well as fire-fighting measures against the cable are added to the text; the code has also been made up by part of the content about the laying of underwater cable and mechanical laying of cable as well as manufacture requirements on plastic cable terminals and connectors.During the execution of this code, when places where emendation or supplement are found necessary, the idea and the concerning data are expected to be sent to the management unit of this code i.e. the Electric Power Construction Research institute of the Energy Source Ministry (Liangxiang Beijing zip code: 102401) for our reference in the future emendation.Ministry of Energy SourceDecember 1990ContentChapter 1 General Principle (5)Chapter 2 Transportation and storage (7)Chapter 3 Processing and laying of cable tubes (9)Chapter 4 Manufacture and installation of cable support (11)Chapter 5 Laying of the cable (13)Section 1 General regulation (13)Section 2 Laying of the cable inside production buildings or in tunnels or ditches (17)Section 3 Laying of the cable inside tubes (18)Section 4 Laying of directly embedded cables (19)Section 5 Laying of underwater cables (21)Section 6 Laying of cables above bridge (23)Chapter 6 Manufacture of cable terminals and connectors (24)Section 1 General regulations and preparation works (24)Section 2 Manufacture requirements (26)Chapter 7 Fire-fighting and flame retardant measures for cable (29)Chapter 8 Hand-over and acceptance of engineering (30)Annex 1 Explanations on nouns applied in this code (32)Annex 2 Typical calculation formulae for lateral pressure and traction (33)Annex 3 Explanations on terms applied in this code (35)Additive notes (36)Chapter 1 General PrinciplesArticle 1.0.1 The establishment of this code is on purpose to ensure the construction quality of installation engineering of cable lines, to promote the technical improvement of the construction of cable lines and to ensure a safety work of cable lines.Article 1.0.2 This code is applicable for construction and acceptance of the installation engineering of electric power cable lines or control cable lines that work with a voltage of 500 kv or lower.The installation engineering of cable lines with special requirement such as those applicable for mines, ships, metallurgy and Chemistry shall be in accordance with the corresponding rules of the profession.Article 1.0.3 Installation of cable lines shall be conducted in accordance with approved design.Article 1.0.4 The transportation and storage of cable and its appendixes shall be in accordance with the requirement of this code. When the product is with special requirement they shall be in accordance with the requirement.Article 1.0.5 The storage period of cable and its appendixes before installation shall be not longer than 1 year. When a long-term storage is necessary, the period shall be in accordance with special regulations of equipment storage.Article 1.0.6 The adopted cable as well as its appendixes shall be in accordance with the regulations of the running technical standards of the country and qualified certificates shall be available. The equipment shall be with proper nameplate.Article 1.0.7 The safety technical measures adopted in construction shall be in accordance with this code as well as the running safety technical standards and product technical documents. The safety technical measures shall be set down beforehand for important construction projects or procedures.Article 1.0.8 The practice of the construction projects that are related to cable line installation shall be in accordance with the following requirements:A.T he constructional engineering quality of buildings and structures that related to cable line installation shall be in accordance with the concerning regulations in the actual national codes of construction and acceptance of constructional engineering.B.B efore installation of cable lines, the constructional engineering shall meet the following requirements:a. The pre-embedded fittings shall be in accordance with design and fixed firmly;b. Surfacing and float work shall be finished where there exist cable ducts, tunnels orvertical shafts;c. The temporary construction devices, templates and construction rubbish shall becleared away where there exist cable layers, cable ducts or tunnels; the construction passage shall be unblocked and coverage plates shall be complete;d. The construction works that can not be carried out after the laying of cable linesshall be finished beforehand;e. Water discharge of cable duct shall be free and the installation of doors andwindows of the cable room shall be finished.C.T he decorating works of construction engineering caused by the necessity of vacancy-filling, boring or reaming for built-in fittings shall be finished before the startup of an installation finished cable line.Article 1.0.9 Hot galvanized products shall be applied as steel fixing device for installation of cable and its appendixes with exception of anchor-bolt.Article 1.0.10 The anti-jamming measures shall be adopted according to design regulations for the cable lines with requirement on anti-jamming.Article 1.0.11 For the construction and acceptance of cable lines, the regulations in this code shall be executed and the actual national standards or codes concerned shall also be observed.Chapter 2 Transportation and storageArticle 2.0.1 During transportation, loading and unloading, cable and cable reel shall not be damaged. It is forbidden to push down the cable reel directly from trucks. The cable reel shall not be placed flatly during transportation and storage.Article 2.0.2 Before transportation or rolling of cable, it must be ensured that the cable reel is firm and the cable is coiled tightly on the reel. For the oil-filled cable, the oil tube between the cable and pressure oil tank shall be fixed and shall not be damaged. The pressure oil tank shall be firm and the pressure indication shall conform to the requirement.Should the cable reel be rolled, the rolling must be along the direction which the arrows on the reel indicate or the direction which makes the cable to go tighter on the reel.Article 2.0.3 When the cable and its appendixes arrives at the site, an inspection shall be conducted according to the following requirements:A.T he technical documents of product shall be complete;B.T he type, specification and length shall conform to the requirement of the order and the appendixes shall be complete; the appearance of the cable shall be intact without any damage.C.T he sealed end of the cable shall be tight. When there exists suspicion in the visual inspection, estimation or test shall be made whether the cable is affected with damp.D.T he pressure oil tank, oil tube, valves and pressure gauges for oil-filled cable shall be intact and in accordance with the requirement.Article 2.0.4 When cable and the related material are not to be installed immediately, they shall be stored according to the following requirements:A.A concentrated and classified storage shall be made for the cable; the type, voltage, specification and length of the cable shall be marked and there shall be passages between cable reels; the groundsill shall be solid and when conditions are limited the reel shall be underlayed; there shall be no accumulated water at the storage site;B.M easures shall be taken to prevent any damage to the porcelain bushing of the cable terminal during storage;C.T he damp-proof package for the insulating material of the cable appendixes shall be well sealed and properly stored and kept according to the material performance and keeping requirement.D.T he fireproof material such as fireproof coating, tape and fire-stopping material shall be properly stored and kept according to the material performance and keepingrequirement.E. A classified keeping shall be made to the bridge support of cable and the bridge support shall not be deformed under stress.Article 2.0.5 During keeping period of the cable, the cable reel and package shall be intact, symbols shall be complete and the sealed ends shall be tight. Should any defects occur, they shall be disposed in time.The oil pressure for the oil-filled cable shall be often inspected and recorded and it shall not be lower than the minimum value. When the oil pressure decreases to zero or vacuum occurs, it shall be disposed in time.Chapter 3 Processing and laying of cable tubesArticle 3.0.1 There shall be no perforations, cracks or obvious unevenness on the cable tube and the inner wall of the tube shall be smooth. There shall be no serious corrosion on the metal cable tube. The hard plastic tube shall not be applied in locations where temperature is too high or too low. The piping material with enough strength shall be applied in locations where it is easily to subject mechanical damage or the direct embedding is located where the tube is under larger stress.Article 3.0.2 The processing of cable tube shall meet the following requirements:A.T here shall be no burrs or sharp edges at the mouth of the tube and the mouth may be made in the shape of a bugle.B.A fter bending, there shall not be cracks or obvious concaveness on the tube and the bending flattening may not be larger than 10% of the outer diameter of the tube; the bending radius shall not be lower than the minimum allowable bending radius of the cable inside the tube.C.T he outer surface of metal tube shall be coated with anti-corrosion paints or asphaltum;for galvanized tube the anti-corrosion paints shall also be applied where zinc layer scales off.Article 3.0.3 The ratio of the inner diameter of the cable tube to outer diameter of the cable shall not be lower than 1.5; besides this requirement, the inner diameter of the tube made from concrete, argil or asbestos cement may not be less than 100mm.Article 3.0.4 The number of elbows to be applied to each tube shall not be more than 3 and that of the right angle bend shall not be more than 2.Article 3.0.5 When the cable tube is laid openly, the following requirements shall be observed:A.T he cable tube shall be installed firmly; when regulations are not given by design, the distance between support points of the tube may not be larger than 3 meters.B.W hen straight length of the plastic tube is larger than 30 meters, expansion joints may be applied to it.Article 3.0.6 The connection between cable tubes shall meet the following requirements:A.T he connection between metal cable tubes shall be firm and with proper sealing, both tube mouths shall be well aligned. The length of connected short bushing or threaded nipple shall not be less than 2.2 times outer diameter of the cable tube. Direct butt welding may not be applied to metal cable tubes.B.W hen sleeve joint or insertion joint is applied to hard plastic tubes, the inserting length may be 1.1 – 1.8 times inner diameter of the tube for insertion joint and the inserting surface shall be coated with agglutinant to ensure a firm connection and well sealing;for sleeve joint, both ends of the sleeve shall be sealed by welding.Article 3.0.7 When the cable tube is led to the equipment, the location of the tube mouth shall be convenient for connecting the tube to the equipment without obstructing the mounting and dismounting as well as moving in and out of the equipment. Parallel arranged tube mouths shall be tidily and well arrayed.Article 3.0.8 When the protective steel tube of the cable is used as earth connection, the grounding wire shall be welded beforehand; when pipe connection is threaded, jumper wire shall be welded and the cable shall be put in afterwards.Article 3.0.9 When the tube made from concrete, argil or asbestos cement is installed, the groundsill shall be solid, flat and even without any caving in. The installation of the cable tube shall be in accordance with the following requirements:A.T he imbedding depth of the cable tube shall not be less than 0.7m and when the tube is installed below the pavement, the depth shall not be less than 0.5m.B.T he cable tube shall be with a water discharge gradient of not less than 0.1%.C.W hen cable tubes are jointed, the tube mouths shall be well matched with a tight connecting seam and any infiltration of underground water or mud shall not be allowable.Chapter 4 Manufacture and installation of cable supportArticle 4.0.1 The processing of the cable support shall be in accordance with the following regulations:A.T he steel material shall be straight and flat without any obvious distortion. The material preparation error shall be within she scope of 5mm and the cutting edge shall be free from any curling or burr.B.T he support shall be firmly welded without any obvious deformation. The deviation between the vertical wale-to-wale net distance and its design value shall not be more than 5mm.C.A nti-corrosion measures shall be taken to metal cable supports and special anti-corrosion disposal shall be conducted according to the design for areas where exists hot damp, salty mist or chemical corrosion.Article 4.0.2 When it is not regulated in the design, the minimum distance between layers of cable support may refer to the regulations in Table 4.0.2. But the net distance between support layers shall not be less than 2 times outer diameter of the cable plus 10mm and the distance shall not be less than 2 times outer diameter of the cable plus 50mm for high voltage cables of 35 kv and more.Table 4.0.2 the minimum allowable value for distance between layers of cable support(mm)Notes: h indicates the shell height of the groove box.Article 4.0.3 The cable supports shall be installed firmly and arranged in good order; the fixing method of brackets, underlaying and hanging supports shall be fixed according to the requirement of design. The crosspieces in the same layer of each support shall be arranged on the same level and the difference of height shall not be larger than 5mm. For the arrangement of brackets, underlaying and hanging supports, the deviation from theorientation of the bridge support shall not be larger than 10mm.When the cable supports are installed in the cable duct or on the building with certain gradient, they shall be arranged to be with the same gradient as the duct or the building. The distance from the top layer of cable support to the top of cable channel (or ceiling of building) and that from the lowest layer to the bottom of cable channel ( or ground level), if not regulated in design, may not be lower than values given in Table 4.0.3.Table 4.0.3 the distance from the top layer of cable support to the top ofcable duct (or ceiling of building) and the distance from the lowest layerof cable support to the bottom of cable duct ( or ground level)(mm)Article 4.0.4 The vertical deviation of a steel structure silo after assembly shall not be larger than 2/1000 of its length; the horizontal deviation of the support wale shall not be larger than 2/1000 of its width; the deviation of the silo diagonal shall not be larger than 5/1000 of the diagonal length.Article 4.0.5 The fabrication of cable bridge shall conform the following requirements: A.T he quality of cable trays, support of cable trays as well as their connecting pieces and fittings shall be in accordance with the actual technical standards concerned.B.T he specification of the cable trays, the span between underlaying or hanging supports and the type of anti-corrosion measures shall conform to design requirements.Article 4.0.6 The cable tray shall be firmly fixed on each support; the bolts of the connecting board of cable tray shall be fastened tightly and the bolt nuts shall be arranged outside the tray.When aluminum alloy cable tray is fixed on the steel support, measures to prevent electrochemical corrosion shall be taken.Article 4.0.7 When the straight section of a steel cable bridge is over 30m, or the length of aluminum alloy or polyester cable bridge is over 15 m, the expansion seams shall be provided and the connecting board with expansion function may be adopted for connection of the seams; the expansion seams shall be provided where the cable bridge crosses the expansion seams of a building.Article 4.0.8The bending radius at the cable bridge turning shall not be less than the minimum allowable bending radius of the cable which, compared with other cables on the bridge, has biggest value of minimum allowable bending radius.Article 4.0.9 A proper grounding shall be provided along the total length of cable support.Chapter 5 Laying of the cableSection 1 General regulationArticle 5.1.1 Inspections shall be made according to the following requirements before cable-laying:A.C able passage shall keep unblocked and shall be with proper water discharge devices.The anti-corrosion layer for metal part shall be complete. The illumination and venting inside the tunnel shall conform to design requirement.B.T he type, voltage and specifications of the cable shall be in accordance with design.C.T he appearance of cable shall be free from any damage and the cable shall be with proper insulation. Should the sealing of cable be under any suspicion, estimation shall be made for damp. Directly embedded cable and under-water cable shall be tested and qualified.D.T he oil pressure of oil-filled cable may not be lower than 0.15Mpa; the valve that supplies oil shall be set at open position and able to act promptly; the pressure gauge indication shall be free from any abnormity; oil-leakage shall be excluded for all pipe connections; oil sample shall be tested and qualified.E. The cable releasing racks shall be set stably and the strength and length of their steel shafts shall match the weight and width of the cable reel.F. Calculations shall be made before cable-laying for the length of each cable according to the design route and actual route; to minimize the number of cable connections, a reasonable arrangement shall be made for each reel of cable.G.R eliable safety measures shall be taken when cable-laying is carried out in an electriferous area.Article 5.1.2 When cable-laying is being conducted, any damage to the water-proof layer of cable duct, tunnel, cable shaft and man shaft shall be excluded.Article 5.1.3 The 4-core electric power cable shall be adopted in a 3-phase and 4-wire system, any substitution with 3-core cable plus a sing core cable or using the metal sleeve of cable as neutral wire shall not be allowable.Article 5.1.4 It is proper to adopt same length, type and specifications for parallel connected cables.Article 5.1.5 To preserve spare length for power cable near terminals and connections is proper.Article 5.1.6 The distance between supporting points of cable shall conform to design regulations and if not regulated in design, the distance shall not be larger than figures given in Table 5.1.6.Table 5.1.6 minimum bending radius of cable(mm)Notes: When total plastic power cable is laid horizontally, if the cable can be fixed along the support, the distance between support points to be set as 800mm is permitted.Article 5.1.7 The minimum bending radius of cable shall conform the regulations in Table 5.1.7.Table 5.1.7 the minimum bending radius of cableNotes: The symbol “D” in the table indicates outer diameter of cable.Article 5.1.8 The maximum height difference between the highest point and the lowest point of viscous oilpaper insulated cable shall not exceed the regulated values in Table 5.1.8. When it is not possible to meet this requirement, the cables suitable for larger height difference shall be applied.Table 5.1.8 the maximum permitted height difference to be laid forviscous oilpaper-insulated lead-wrapped power cableArticle 5.1.9 During cable-laying, the cable shall be led out from the top of the reel and it is not permitted to haul the cable and make it worn on the rack or on the ground. Any not removed mechanical damage, such as flattening of the cable armour under pressure, twisting of cable or cracking of the protective layer by turning are not allowable.Article 5.1.10 When cable-laying is conducted by mechanism, the maximum tenacity may refer to the regulations in Table 5.1.10. The total tensile force subjected by oil-filled cable shall not exceed 27kN.Table 5.1.10 the maximum tenacity of cable (N/mm2)Article 5.1.11 The speed of cable-laying by mechanism is not proper to exceed 15m/min; when cable of 110 kv and above are laid on rather complicated route, the speed shall be slackened.Article 5.1.12 When cables with larger section area are laid mechanically under complicated conditions, construction organization and design shall be made thus to determine method of laying, positions to set up reel support rack and orientation of cable traction and to recheck the traction and lateral stress, as well as to make arrangement for personnel and tools for laying.Article 5.1.13 When cables are laid mechanically, twiddling-prevention devices shall be installed between the drawing head or steel mesh sheath and the tractive wire rope.Article 5.1.14 When cables of 110 kv or above are laid, the lateral stress at turnings shall not exceed 3 kN/m.Article 5.1.15 When the oilpaper insulated power cable is cut off, the cut ends shall be lead-sealed immediately; the plastic insulated cable shall be equipped with reliableanti-damp sealing ends; after cutting off, the oil-filled cable shall also meet the following conditions:A.I n any case, any part of oil-filled cable shall be equipped with a pressure oil tank so as to keep oil pressure.B.W hen connecting the pipeline, the air in the tube shall be expelled and oil-spray connection shall be applied.C.T he position where the oil-filled cable is cut off shall be higher than the cable at both sides.D.N o metal dust or dirt shall enter the cable during cutting.Article 5.1.16 During cable-laying, the lowest allowable laying temperature and the mean temperature in 24 hours before laying as well as the temperature at laying site shall not be lower than the regulations in Table 5.1.16; corresponding measures shall be taken when temperature is lower than the regulated values given in Table 5.1.16.Table 5.1.16 the lowest allowable temperature for cable-layingArticle 5.1.17 The arrangement for power cable connections shall conform the following requirements:A.T he connection positions for cables laid in parallel shall be staggered from each other. B.T he connectors of openly laid cables shall be fixed by supporting boards.C.P rotective hood shall be provided outside the junction box of directly embedded cable so as to prevent mechanical damage (with exception of epoxy resin junction box). For junction boxes located under frozen earth, asphalt shall be filled in the box.Article 5.1.18 During laying, the cable shall be arranged tidily and properly fixed.Intercross laying of the cable is not proper. Signboards shall be installed in time.Article 5.1.19 The setting up of sign boards shall conform the following requirements: A.S ign boards shall be installed on the cable at places such as the end of cable terminals, connections and turning points of cable, inside of interlayers, both ends of vertical shafts and tunnels and inside of man shafts.B.T he route number shall be marked on the signboard. When route number is not available the type, specification as well as the beginning and end positions of the cable shall be written clearly on the signboard; the parallel arranged cables shall be provided with serial number. The writing on the signboard shall be legible and not easy to drop off.C.T he style of signboards shall be unified. The signboard shall be corrosion-proof and installed firmly.Article 5.1.20 The fixing of the cable shall conform the following requirements:A.T he cable shall be fixed in following locations:a. Every support for vertically laid or aslant (over 45°) laid cables; at intervals of 2mon the bridge support;b. At both ends of a cable, a cable turning and a cable connection for horizontally laidcables; at intervals of 5 – 10m when space between cables is regulated;c. Locations for fixing the single-core cable shall be in accordance with therequirement of design.B.T he fixing device shall not form a closed magnetic circuit for single-core cable in AC system or misphasing lead sheath cable after phase splitting.C.T he fixing position of naked lead (aluminum) sheath cables shall be protected by soft pad.D.W hen the protective layer of cable is required to be insulated, insulating pad shall be provided where the cable is fixed.Article 5.1.21 The metal protection layer or metal protection pipe of openly laid cable along electrified railroad or the bridge through which the electrified railroad passes shall be insulated with the metal support or metal structures of the bridge along its total length.Article 5.1.22 When cable enters cable ducts, tunnels, vertical shafts, buildings, panels (cabinets) or passes through pipes, the inlet (outlet) or the mouth of the pipe shall be sealed. Article 5.1.23 For the lighthouse equipped with lightning rod, the cable-laying shall conform to the concerning requirements in the actual national standard《Code for construction and acceptance of the grounding devices in electric equipment installation engineering》.Section 2 Laying of the cable inside production buildings or in tunnels or ditchesArticle 5.2.1 The arrangement of the cable shall meet the following requirements:。

电气装置安装工程盘、柜及二次回路结线施工及验收规范GB50171-92

电气装置安装工程盘、柜及二次回路结线施工及验收规范GB50171-92

电气装置安装工程盘、柜及二次回路结线施工及验收规范(gb50171—92)第一章总则第二章盘、柜的安装第三章盘、柜上的电器安装第四章二次回路结线第五章工程交接验收附录一本规范用词说明第一章总则第1.0.1条为保证盘、柜装置及二次回路结线安装工程的施工质量,促进工程施工技术水平的提高,确保盘、柜装置及二次回路安全运行,制订本规范。

第1.0.2条本规范适用于各类配电盘、保护盘、控制盘、屏、台、箱和成套柜等及其二次回路结线安装工程的施工及验收。

第1。

0.3条盘、柜装置及二次回路结线的安装工程应按已批准的设计进行施工。

第1.0。

4条盘、柜等在搬运和安装时应采取防震、防潮、防止框架变形和漆面受损等安全措施,必要时可将装置性设备和易损元件拆下单独包装运输.当产品有特殊要求时,尚应符合产品技术文件的规定.第1.0。

5条盘、柜应存放在室内或能避雨、雪、风、沙的干燥场所。

对有特殊保管要求的装置性设备和电气元件,应按规定保管。

第1.0。

6条采用的设备和器材,必须是符合国家现行技术标准的合格产品,并有合格证件.设备应有铭牌。

第1.0.7条设备和器材到达现场后,应在规定期限内作验收检查,并应符合下列要求:一、包装及密封良好.二、开箱检查型号、规格符合设计要求,设备无损伤,附件、备件齐全.三、产品的技术文件齐全。

四、按本规范要求外观检查合格。

第1。

0.8条施工中的安全技术措施,应符合本规范和国家现行有关安全技术标准及产品技术文件的规定.第1.0。

9条与盘、柜装置及二次回路结线安装工程有关的建筑工程的施工,应符合下列要求:一、与盘、柜装置及二次回路结线安装有关的建筑物、构筑物的建筑工程质量,应符合国家现行的建筑工程施工及验收规范中的有关规定。

当设备或设计有特殊要求时,尚应满足其要求.二、设备安装前建筑工程应具备下列条件:1。

屋顶、楼板施工完毕,不得渗漏;2。

结束室内地面工作,室内沟道无积水、杂物;3。

预埋件及预留孔符合设计要求,预埋件应牢固;4.门窗安装完毕;5。

(完整版)35KV及以下架空电力线路施工及验收规范(GB50173-92)

(完整版)35KV及以下架空电力线路施工及验收规范(GB50173-92)

中华人民共和国国家标准电气装置安装工程35KV及以下架空电力线路施工及验收规范GB50173-92中华人民共和国国家标准电气装置安装工程35KV及以下架空电力线路施工及验收规范GB50173-92主编部门:中华人民共和国能源部批准部门:中华人民共和国建设部施行日期:1993年7月1日关于发布国家标准《电气装置安装工程35kV及以下架空电力线路施工及验收规范》的通知建标〔1992〕912号根据国家计委计综〔1986〕2630号文的要求,由能源部会同有关部门共同修订的《电气装置安装工程35kV及以下架空电力线路施工及验收规范》,已经有关部门会审。

现批准《电气装置安装工程35kV及以下架空电力线路施工及验收规范》GB50173-92为强制性国家标准,自一九九三年七月一日起施行。

原《电气装置安装工程施工及验收规范》GBJ232-82中第十二篇“10kV及以下架空配电线路篇”同时废止。

本标准由能源部负责管理,具体解释等工作由能源部电力建设研究所负责.出版发行由建设部标准定额研究所负责组织。

中华人民共和国建设部一九九二年十二月十六日修订说明本规范是根据国家计委计综〔1986〕2630号文的要求,由原水利电力部负责主编,具体由能源部电力建设研究所、北京供电局会同有关单位共同编制而成。

在修订过程中,规范编写组进行了广泛的调查研究,认真总结了原规范执行以来的经验,吸取了部分科研成果,广泛征求了全国有关单位的意见,最后由我部会同有关部门审查定稿。

本规范共分十章和一个附录,这次修订是对原《电气装置安装工程施工及验收规范》(GBJ232-82)中的第十二篇“10kV及以下架空配电线路篇”进行修订.修订中,经我部提议,并征得建设部同意,将35kV架空电力线路有关内容列入本规范,并改名为《电气装置安装工程35kV及以下架空电力线路施工及验收规范》。

本规范在执行过程中,如发现需要修改和补充,请将意见和有关资料寄送能源部电力建设研究所(北京良乡,邮政编码:102401),以便今后修订时参考。

(完整版)电气装置安装工程1KV及以下配线工程施工及验收规范GB50258—96

(完整版)电气装置安装工程1KV及以下配线工程施工及验收规范GB50258—96

电气装置安装工程1KV及以下配线工程施工及验收规范GB50258—96中华人民共和国国家标准电气装置安装工程1KV及以下配线工程施工及验收规范GB50258—96主编部门:中华人民共和国电力工业部批准部门:中华人民共和国建设部施行日期:1997年2月1日关于发布国家标准《电气装置安装工程1KV及以下配线工程施工及验收规范》、《电气装置安装工程电气照明装置施工及验收规范》的通知建标[1996]475号根据国家计委计综[1986]2630号和建设部(90)建标技字第4号文的要求,由电力工业部会同有关部门共同修订的《电气装置安装工程1KV及以下配线工程施工及验收规范》和《电气装置安装工程电气照明装置施工及验收规范》,已经有关部门会审。

现批准《电气装置安装工程1KV及以下配线工程施工及验收规范》GB50258—96和《电气装置安装工程电气照明装置施工及验收规范》GB50259—96为强制性国家标准,自一九九七年二月一日起施行。

原国家标准《电气装置安装工程施工及验收规范》GBJ232—82中第十三篇“配线工程篇”和第十四篇“电气照明装置篇”同时废止。

本规范由电力工业部负责管理,具体解释等工作由电力工业部电力建设研究所负责,出版发行由建设部标准定额研究所负责组织。

中华人民共和国建设部一九九六年八月十六日1 总则1.0.1为保证电气装置配线工程的施工质量,促进技术进步,确保安全运行,制订本规范。

1.0.2本规范适用于建筑物、构筑物中1KV及以下配线工程的施工及验收。

1.0.3配线工程的施工应按已批准的设计进行。

当修改设计时,应经原设计单位同意,方可进行。

1.0.4采用的器材及其运输和保管,应符合国家现行标准的有关规定;当产品有特殊要求时,尚应符合产品技术文件的规定。

1.0.5器材到达施工现场后,应按下列要求进行检查:1.0.5.1技术文件应齐全。

1.0.5.2型号、规格及外观质量应符合设计要求和本规范的规定。

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GB电气装置安装工程电缆线路施工及验收规范GB电气装置安装工程电缆线路施工及验收规范是中华人民共和国国家标准,由能源部和建设部共同制订。

该规范的目的是确保电缆线路的施工质量和安全运行。

本规范适用于500kV及以下电力电缆、控制电缆线路安装工程的施工及验收,但对于矿山、船舶、冶金、化工等有特殊要求的电缆线路的安装工程,应符合专业规程的有关规定。

在施工前,电缆线路的安装应按照已批准的设计进行。

同时,电缆及其附件的运输、保管也应符合本规范的要求。

当产品有特殊要求时,还应符合产品的要求。

电缆及其附件在安装前的保管期限应为一年及以下,若需长期保管,则应符合设备保管的专门规定。

总之,本规范的实施将有助于促进电缆线路施工技术水平的提高,保障电缆线路的安全运行。

四、防火材料如防火涂料、包带、堵料等,应根据其性能和保管要求进行储存和保管。

五、电缆桥架应分类储存,以避免因受力而变形。

在储存期间,电缆盘及其包装应保持完好,标志应清晰,封端应密封。

一旦发现缺陷,应及时处理。

充油电缆应经常检查油压,并记录,油压不得降至最低值。

当油压降至零或出现真空时,应及时处理。

第三章电缆管的加工与敷设电缆管不应有穿孔、裂缝和明显的凹凸不平,内壁应光滑;金属电缆管不应有严重锈蚀。

硬质塑料管不应用于温度过高或过低的场所。

在易受机械损伤的地方和在受力较大处直埋时,应采用足够强度的管材。

电缆管的加工应符合以下要求:一、管口应无毛刺和尖锐棱角,宜做成喇叭形。

二、电缆管在弯制后,不应有裂缝和明显的凹瘪现象,其弯扁程度不应大于管子外径的10%;电缆管的弯曲半径不应小于所穿入电缆的最小允许弯曲半径。

三、金属电缆管应在外表涂上防腐漆或涂沥青,镀锌管锌层剥落处也应涂以防腐漆。

电缆管的内径与电缆外径之比不得小于1.1;混凝土管、陶土管、石棉水泥管除应满足上述要求外,其内径尚不宜小于100mm。

每根电缆管的弯头不应超过3个,直角弯不应超过2个。

电缆管明敷时应符合以下要求:一、电缆管应安装牢固;电缆管支持点间的距离,当设计无规定时,不应超过3m。

二、当塑料管的直线长度超过30m时,应加装伸缩节。

电缆管的连接应符合以下要求:一、金属电缆管连接应牢固,密封应良好,两管口应对准。

套接的短套管或带螺纹的管接头的长度,不应小于电缆管外径的1倍。

金属电缆管不宜直接对焊。

二、硬质塑料管在套接或插接时,其插入深度宜为管子内径的1/3.在插接面上应涂以胶合剂粘牢密封;采用套接时套管两端应封焊。

引至设备的电缆管管口位置应便于与设备连接,并不妨碍设备拆装和进出。

并列敷设的电缆管管口应排列整齐。

利用电缆的保护钢管作接地线时,应先焊好接地线;有螺纹的管接头处,应用跳线焊接,再敷设电缆。

敷设混凝土、陶土、石棉水泥等电缆管时,其地基应坚实、平整,不应有沉陷。

电缆管的敷设应符合以下要求:一、电缆管的埋设深度不应小于1m;在人行道下面敷设时,不应小于0.5m。

二、电缆管应有不小于1%的排水坡度。

三、电缆管连接时,管孔应对准,接缝应严密,不得有地下水和泥浆渗入。

第四章电缆支架的配制与安装电缆支架的加工应符合以下要求:1.钢材应该保持平直,没有明显的扭曲。

下料误差应该在5mm范围内,切口应该没有卷边和毛刺。

2.支架应该焊接牢固,没有明显的变形。

各横撑之间的垂直净距离和设计偏差不应该超过5mm。

3.金属电缆支架必须进行防腐处理。

在湿热、盐雾以及有化学腐蚀的地区,应该根据设计采取特殊的防腐处理措施。

在没有规定的情况下,电缆支架的层间允许最小距离可以参考表格。

但是层间净距不应该小于两倍电缆外径加10mm,35kV及以上高压电缆不应该小于2倍电缆外径加50mm。

表格:电缆支架的层间允许最小距离值(mm)电缆类型和敷设特征 | 控制电缆 | 10kV及以下(除6~10kV交联聚乙烯绝缘外) | 6~10kV交联聚乙烯绝缘 | 电力 |35kV单芯电缆 | 35kV三芯电缆 | 110kV及以上,每层多于1根 | 110kV及以上,每层1根 | 电缆敷设于槽盒内 |支(吊)架 | 120 | 150~200 | 200~250 | 300 | 250 | h+80 |桥架 | 200 | 250 | 300 |。

| 350 | 300 | h+100 |4.电缆支架应该安装牢固,平稳垂直;托架支吊架的固定方式应该按照设计要求进行。

各支架的同层横挡应该在同一水平面上,高低偏差不应该超过5mm。

托架支吊架沿着桥架走向的左右偏差不应该超过10mm。

在有坡度的电缆沟内或建筑物上安装的电缆支架,应该与电缆沟或建筑物保持相同的坡度。

5.电缆支架最上层和最下层到沟顶、楼板或沟底、地面的距离,在没有规定的情况下,不应该小于表格中的数值。

表格:电缆支架最上层和最下层到沟顶、楼板或沟底、地面的距离敷设方式 | 最上层至沟顶或楼板 | 最下层至沟底或地面 |电缆隧道及夹层 | 300~350 | 100~150 |6.组装后的钢结构竖井,其垂直偏差不应该超过其长度的2/1000;支架横撑的水平误差不应该超过其宽度的2/1000;竖井对角线的偏差不应该超过其对角线长度的5/1000.7.电缆桥架的配制应该符合以下要求:电缆沟 | 150~200 | 50~100 |吊架 | 150~200 | — |桥架 | 350~450 | 100~150 |8.电缆梯架(托盘)、电缆梯架(托盘)的支(吊)架、连接件和附件的质量应该符合现行的有关技术标准。

电缆梯架(托盘)的规格、支吊跨距、防腐类型应该符合设计要求。

9.梯架(托盘)在每个支吊架上的固定应该牢固;梯架(托盘)连接板的螺栓应该紧固,螺母应该位于梯架(托盘)的外侧。

铝合金梯架在钢制支吊架上固定时,应该采取防电化腐蚀的措施。

1.当直线段钢制电缆桥架超过30m、铝合金或玻璃钢制电缆桥架超过15m时,应设置伸缩缝,并使用伸缩连接板进行连接。

同时,电缆桥架在跨越建筑物伸缩缝处也应设置伸缩缝。

2.电缆桥架转弯处的转弯半径不应小于该桥架上的电缆最小允许弯曲半径的最大值。

3.电缆支架全长应接地良好。

4.第五章电缆的敷设的第一节一般规定中,电缆敷设前应进行检查,包括电缆通道畅通、排水良好、金属部分防腐层完整、隧道内照明和通风符合要求、电缆型号、电压和规格符合设计、电缆外观无损伤且绝缘良好、直埋电缆和水底电缆经过试验合格、充油电缆油压不宜低于规定、供油阀门在开启位置且动作灵活、压力表指示无异常、所有管接头无渗漏油、油样经过试验合格、电缆放线架放置稳妥且钢轴强度和长度与电缆盘重量和宽度相配合、敷设前应按设计和实际路径计算每根电缆的长度、合理安排每盘电缆并减少电缆接头、在带电区域内敷设电缆应有可靠的安全措施。

5.电缆敷设时,不应损坏电缆沟、隧道、电缆井和人井的防水层。

6.三相四线制系统中应采用四芯电力电缆,不应采用三芯电缆另加一根单芯电缆或以导线、电缆金属护套作中性线。

7.并联使用的电力电缆应具有相同的长度、型号和规格。

8.电力电缆在终端头与接头附近应留有备用长度。

9.电缆各支持点间的距离应符合设计规定,并且不应大于表中所列数值。

10.表中列出了不同电缆种类和敷设方式下的电缆各支持点间的距离。

11.电缆的最小弯曲半径应符合表中的规定。

12.粘性油浸纸绝缘电缆最高点与最低点之间的最大位差不应超过表中的规定。

如果无法满足要求,应采用适用于高位差的电缆。

表中还列出了不同电缆型式的最小弯曲半径,其中D为电缆外径。

20D 表粘性油浸纸绝缘铅包电力电缆的最大允许敷设位差电压(kV) 电缆护层结构1 无铠装6~10 铠装35 铠装或无铠装110 铠装或无铠装在敷设电缆时,应避免电缆在支架和地面上摩擦拖拉,从盘的上端引出电缆。

电缆上不得有铠装压扁、电缆绞拧、护层折裂等未消除的机械损伤。

机械敷设电缆的最大牵引强度应符合表中的规定,充油电缆总拉力不应超过27kN。

机械敷设电缆的速度不宜超过15m/min,110kV及以上电缆或在较复杂路径上敷设时,其速度应适当放慢。

表电缆最大牵引强度(N/mm2)牵引方式受力部位允许牵引强度牵引头铜芯 70铝芯 40钢丝网套铅套 10铝套 40塑料护套 7在复杂条件下敷设大截面电缆时,应进行施工组织设计,确定敷设方法、线盘架设位置、电缆牵引方向,校核牵引力和侧压力,配备敷设人员和机具。

敷设电缆时,应在牵引头或钢丝网套与牵引钢缆之间装设防捻器。

110kV及以上电缆敷设时,转弯处的侧压力不应大于3kN/m。

油浸纸绝缘电力电缆在切断后,应立即铅封端头;塑料绝缘电缆应有可靠的防潮封端;充油电缆在切断后,任何一段都应有压力油箱保持油压。

连接油管路时,应排除管内空气,并采用喷油连接。

充油电缆的切断处必须高于邻近两侧的电缆,切断时不应有金属屑及污物进入电缆。

敷设电缆时,电缆允许敷设最低温度,在敷设前24小时内的平均温度以及敷设现场的温度不应低于表中的规定。

当温度低于规定值时,应采取措施。

表电缆允许敷设最低温度(℃)电缆类型电缆结构允许敷设最低温度油浸纸绝缘电力电缆充油电缆 -10其他油纸电缆 -15橡皮或聚氯乙烯护套 -20橡皮绝缘电力电缆 -7塑料绝缘电力电缆 -20控制电缆 -15裸铅套 -10电力电缆接头的布置应符合以下要求:并列敷设的电缆,其接头的位置应相互错开。

电缆明敷时的接头,应用托板托置固定。

直埋电缆接头盒外面应有防止机械损伤的保护盒(环氧树脂接头盒除外)。

位于冻土层内的保护盒,盒内宜注以沥青。

电缆敷设时应排列整齐,不应交叉,并且要及时固定和装设标志牌。

标志牌应该放在电缆终端头、电缆接头、拐弯处、夹层内、隧道及竖井的两端、人井内等地方。

标志牌上应该注明线路编号,或者电缆型号、规格及起迄地点。

标志牌的字迹应清晰,不易脱落,规格应统一,挂装应牢固。

电缆的固定应符合以下要求:垂直敷设或超过45°倾斜敷设的电缆应在每个支架上固定,桥架上每隔2m处固定;水平敷设的电缆应在电缆首末两端及转弯、电缆接头的两端处固定,当对电缆间距有要求时,每隔5~10m处固定;单芯电缆的固定应符合设计要求。

交流系统的单芯电缆或分相后的分相铅套电缆的固定夹具不应构成闭合磁路。

裸铅(铝)套电缆的固定处应加软衬垫保护,护层有绝缘要求的电缆,在固定处应加绝缘衬垫。

沿电气化铁路或有电气化铁路通过的桥梁上明敷电缆的金属护层或电缆金属管道,应沿其全长与金属支架或桥梁的金属构件绝缘。

电缆进入电缆沟、隧道、竖井、建筑物、盘(柜)以及穿入管子时,出入口应封闭,管口应密封。

装有避雷针的照明灯塔,在电缆敷设时应符合现行国家标准《电气装置安装工程接地装置施工及验收规范》的要求。

在生产厂房内及隧道、沟道内电缆的敷设中,电力电缆和控制电缆不应配置在同一层支架上。

高低压电力电缆、强电、弱电控制电缆应按顺序分层配置,一般情况下宜由上而下配置;但在含有35kV以上高压电缆引入柜盘时,为满足弯曲半径要求,可由下而上配置。

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