屏蔽接地安装手册翻译-中英对照
电缆必须安装在地下管内，每条线路必须单独通过线路的交叉点。承包商负责提供并且安装这些管材。如果可提供多余的管材或者导管，必须获得项目经理的许可方可使用。
承包商负责在作业期间移除和替换电缆沟盖板。
选择的铺设方式，例如,在土壤里，在导管里或者在电缆沟，必须详细描述或者在投标文件的图纸中提出。
道路交叉的挖掘只在车道的一半路面上进行；沥青表面破裂的地方，承包商负责将路面表面恢复到原先的状态。
铺设电缆的承包商必须和负责道路交叉相关作业的施工人员协调，如果有要求，在完成作业后，复原施工的全部开支安装合同的规定由承包商支付。
13.2.2.9 电缆支架，托盘和钢架上的支撑
承包商将提供全部合同安装电缆的支架，托盘和钢架。
全部电缆都需要特别注意整洁和次序。 多方向的铺设将会造成褶皱，因此必须有次序的并符合逻辑的安排电缆的进入和抽取作业:
当电缆铺设在混凝土的电缆架上，必须留出安允许装通风设施的空间，两条电路必须以U形安装在电缆架上。电缆架的铺设必须与另一个至少相隔300毫米。
如果电缆铺设在水平支架上，固定支架至少相隔750毫米和垂直排列至少相隔1500毫米。
用于该项目的非有磁性夹具，在短路期间，在动态的冲力下，将电缆固定。
电缆支撑钢架必须获得项目经理的同意。每个刚性的电缆的支点间距不得大于1000毫米，防止应力对终端造成影响；在通过地板的垂直敷设的电缆必须在地板上方进行支撑。
如果电缆安装暴露于太阳辐射下，必须使用获准的材料，安装遮阳装置。
全部含铁部件；如梯子，电缆支撑结构，支架必须经过热浸电镀或者适合防锈油漆处理，在项目经理的指导下进行并达到项目经理的要求。13.2.2.10 连接和密封
根据相关要求，承包商必须提供所有电缆连接和终端需要的材料，包括投树脂球果，以及全部的安装带，纸张，铅管材料，焊接和其它耗材，并且进行合同中要求的适当的接合作业和所有电缆必要的密封安装作业。
电缆的直线和绝缘接头必须能够进行区分，除非直线接头有合适护套的连续性接头。
承包商负责检查接合和终端作业，以及完成的电缆安装的试运行。
拆开护套的方法，全部电缆的填料和绝缘必须获得项目经理的同意。
承包商负责连接电缆的正确相位。项目经理或者其的监督人员将进行现场试检，如发现故障，承包商将执行任何改正，所需费用由承包商支付。承包商提供的绝缘封盖必须保证电缆在接合之后，保证其绝缘性， 如果有要求，需经过项目经理认可。
13.2.2.11 屏蔽接地和地接
电缆的金属护套必须通变电站的接地系统和线路终端的密封端口连接。绝缘连接必须容易的拆接并方便定期进行测试。
屏蔽接地必须能够通过正常的电缆表皮电流和最大的故障电流，并没有不正常的发热状况。
在共同连接地点的接地，必须包括铜或者铜焊接接地头；焊接接头的横截面不小于95 mm2；绝缘的铜屏蔽地接连接横截面为95mm2，全部由承包商提供并且负责安装进行绝缘连接，要求容易的拆接并方便定期进行测试。个别接地点的的接地抗阻不超过2.0欧姆。如有必要，其它提供的接地点也遵循该数值。
13.2.3计划和图纸准备之的一般情况
承包商负责对的变压器负荷评估和低的电压配电板的随后的场所和性能进行研究，包括第13.1章里指定的安装工作和竣工图：与高架装置产品相关的工作也适用于MV地下电缆安装。
Cables shall be installed in underground pipes at all road crossings with each circuit separate. Such pipes shall be supplied and laid by the Contractor. Existing spare pipes or ducts, if available, may be used only with the permission of the Project Manager.
The Contractor shall be responsible for removing and replacing the trench covers free of charge dur¬ing the execution of the work.
The chosen manner of laying, e.g. in earth, in ducts or in trenches, shall be described exactly or shall be presented with the aid of sketches in the bid.
Excavations for road crossings shall be carried out on only half of the carriageway at a time. Where asphalt surfaces are broken, the Contractor shall be responsible for topping and reinstatement of the surfaces to the equivalent original condition.
The cable-laying Contractor shall coordinate, if required, all his work for road crossings with the rele¬vant road constructor. The costs for complete reinstatement works after the crossing of roads are to be borne by the Contractor in the contract rates.
13,2.2.9 Cables Supported on Racks, Trays, Steel Work
The Contractor shall supply all racks, trays and supporting steelwork for the cables supplied and in¬stalled under this contract.
All cables shall be run with particular regard to neatness and order. Multiple runs shall be marshalled
so that cables entering or leaving the run do so in an orderly and logical manner. :
When cables are laid on cable racks of concrete, which shall be installed to allow space for ventilation, two circuits shall be placed on one cable rack of U form. Cable racks arranged one above the other shall be at least 300 mm apart.
If the cables are arranged on horizontal brackets, they shall be clamped at least every 750 mm and at least every 1500 mm for a vertical arrangement. -
Non-magnetic clamps must be used for this purpose to brace the cables against dynamic impulse forces during short-circuits.
The spacing of cable-supporting steelwork shall be to the approval of the Project Manager. Every non-flexible cable shall be securely supported at a point not more than 1000 mm from its terminal gland to prevent stressing of the terminal, and on vertical runs passing through floors the cable shall be sup¬ported immediately above the floor.
Wherever cables are installed and. exposed to direct solar radiation, sun shields of approved material and design shall be applied and installed.
All ferrous parts such as ladders, cable-supporting structures, brackets shall be hot- dipped galvanized or suitably anti-rust painted, as directed by and to the satisfaction of the Project Manager.
The Contractor shall supply, as and where required, ali materials necessary for jointing and termina¬tion of cables, including cast resin cones, as well as all tapes, papers, plumbing material, solder and other consumable materials and shall carry out all work necessary for the proper jointing and sealing of ali cables installed under this contract.
Cable straight and insulating joints shall be identical, except the straight joints shall have suitable sheath continuity connections.
The Contractor shall be held responsible for checking his jointing and termination work and for com¬missioning into service the completed cable installation.
The method of stripping the sheath, filler and insulation of all cables shall be subject to the approval of the Project Manager.
The Contractor shall be responsible for the correct phase connections of the cables. Site tests shall be carried out by the Project Manager or his Supervision staff and if faults are found the Contractor shall carry out any rectification work at the Contractor's cost. Where insulated glands are provided the Con¬tractor shall ensure that the insulation is maintained after the cables have been jointed and shall, if re¬quired, demonstrate this to the satisfaction of the Project Manager.
13.2.2.11 Bonding and Earthing
The metal sheath of the cables shall be connected to the station earthing system and the earthing of the line terminal pole at the sealing ends. Insulated links shall be included for easy disconnection to carry out periodical serving tests.
The bond connection shall be able to carry the normal sheath current as well as the maximum fault currents without undue heating.
Earthing at the joint locations shall comprise copper or copper-weld earth rods of not less than 95 mm2 cross-section and insuiated copper earth bonding connection of 95 mm2 cross-section, all supplied and installed by the Contractor completely with the earth pits and insulated links, necessary for easy disconnection to facilitate periodical serving tests. The individual ground resistance at each earthing point shall not exceed 2.0 ohm. Where necessary, additional earth rods shal! be provided, to obtain this value.
13,2.3 General Aspects on Planning and Preparation of Drawings
The Contractor's responsibilities for load studies with subsequent site and capacity assessments of transformers and low voltage distribution switchboards, including the installation works and as-built drawings specified in Chapter 13.1: Works Associated with Overhead Line Installations also apply for the MV underground cable installations.
2013.3.16