35kV架空线路施工-英文翻译

35kV架空线路 施工 文明施工目标施工进度表下载283施工进度表下载施工现场晴雨表下载施工日志模板免费下载 -英文翻译 TECHNICAL SPECIFICATIONS FOR CONSTRUCTION OF OVERHEAD POWER LINE OF 35KV AND LESS 1 TECHNICAL SPECIFICATIONS OF CONSTRUCTION 1.1 Conditions of the Installation Construction Design documents and other technical documents are all complete; construction drawings have been jointly checked up; technical clarification and necessary technical training have already completed. The construction and acceptance of the large shelf distance and iron tower of overhead power line of 35kV and less shall be implemented according to the relevant regulations of the existing national standard of "Construction and Acceptance Code of 110-500kV Overhead Power Line" (GBJ233-1990). Type and specification of all equipment and materials shall conform to design and they shall have certificate of qualification. In case of adopting new types of raw material and equipment which have no normal standard, they shall be technically evaluated and tested to be proved qualified prior to application. The installation of the overhead power line shall be constructed according to the approved design. Besides as per this code, the construction of the overhead power line shall comply with the regulations of relevant existing national codes and standards. 1.2 Inspection of Raw Materials and Equipment (1) The surface of the covered wire shall be flattening and smooth with even color and luster, and the thickness of the insulating course shall comply with correlative regulations. The insulating course of the covered wire shall be packed tightly and be easy to be peeled off. The end of the covered wire shall be sealed. (2) The surfaces of the metal accessories and bolts shall be free of cracks, sand hole, peeled off sheet zinc and rustiness etc.. Except for anchor bolt, all other metal shall adopt hot dip galvanized for anti-corrosion. (3) The manufacturing quality of the ring shaped reinforced concrete power pole shall comply with correlative regulations of the existing national standards. During appearance inspection, it shall be free of longitudinal crack, the width of transverse crack shall not exceed 0.1mm, and bend of pole shall not exceed 1/1000 of the length of pole. (4) The strength of the chassis, chuck and guy anchor made of rock shall comply with the design specifications. Integral of the rock structure shall not be damaged during installation. 1.3 Embedment of Foundation Pit and Foundation of Power Pole (1) The displacement of line bar along the normal line direction of 35kV overhead power line shall not exceed 1% of the designed shelf distance; and that of overhead power line of 10kV and less shall not exceed 3%. The displacement of line bar in transversal line direction shall not exceed 50mm. (2) Both of the displacements in transversal line direction and normal line direction of the corner pole and branch pole shall not exceed 50mm. (3) The depth of the foundation pit of the power pole shall comply with the designed regulation, of which the allowable deviation shall be between +100mm and -50mm. The foundation pit on the same base within deviation range shall be flattened according to the depth of the deepest pit. The central deviation of two power poles shall not be more than ?30mm. (4) The foundation pit of 35kV overhead power line shall be tamped once every back filling of 300mm. The foundation pit of overhead power line of 10kV and above shall be tamped once every back filling of 500mm. (5) The in-situ base and rock base shall comply with correlative regulations of existing national standard of "Construction and Acceptance Code of 110-500kV Overhead Power Line" (GBJ233-1990). 1.4 Installation of Power Pole Set and Insulator (1) Welding of reinforced concrete power pole connected by steel ring shall be arc welding and be operated by the qualified welder who has been trained in welding work. After welding, bending of the whole pole shall not exceed 2/1000 of the overall length of the pole. (2) The appropriate measures shall be taken when the welding is made in the weathers of rain, snow and high wind. There shall be no draught in the power pole during welding. When the temperature is below 20?, appropriate measures shall be taken and the preheating temperature shall be 100—120?. (3) As to the installation of single cross arm, line bar shall be installed at the electricity receiving side, and branch pole, 90º corner pole (upper and lower) and terminal pole shall be installed at the side of guy wire. Skewness at left and right ends of the cross arm and the deflection at upper and lower ends of cross arm shall not more than 20mm. (4) The installation of the insulator of the porcelain cross arm shall comply with: when installed erectly, the deflection of the top end along the line shall not be more than 10mm; when installed horizontally, the top end shall be upwarp 5º-15º and the deflection of the top end along the line shall not be more than 20mm. (5) Before installation of the porcelain suspension insulator of 35kV overhead power line, megohm of not less than 5000V shall be used to measure the insulation resistance of the insulators one by one. In drying condition, the resistance of the insulator shall not be less than 500MΩ. 1.5 Installation of Guy Wire (1) The embedment depth and direction of the guy anchor shall comply with the design specification. The distaff shall be perpendicular to the guy anchor. The joint shall use double nuts and the length of exposed part above the ground shall be 500-700mm. (2) After the installation, the allowable deviation of the included angle of ground level comparing with the design value shall comply with following requirements: it shall not be more than 1º for 35kV overhead power line; it shall not be more than 3º for overhead power line of 10kV and less; it shall comply with design specification at special sector. (3) When the installation is fixed with colligation, the steel strand shall be trim and tight. And the minimum winding length shall comply with the requirements in the following table: Minimum Winding Length Minimum Winding Length (mm) Section of The joint at the pulling rod Two Ends of Steel Strand Upper 2Middle Segment (mm) egment Lower Textured Upper with Insulators End Winding End 25 200 200 150 250 80 35 250 250 200 250 80 50 300 300 250 250 80 (4)When the guy wire of the concrete pole is equipped with insulators, the insulator shall not be less than 2.5m above the ground in case of breaking of guy wire. 1.6 Erection of Conducting Wire (1) During unwinding the conducting wire, the appearance of the unwound conducting wire shall be inspected. The appearance shall be free of scuffing, broken section, distortion, metal hook, broken end and so on. (2) Before conducting wire connected with connecting tube, dirt on the surface of the conducting wire and inside the connecting tube shall be cleaned. The length of the cleaned section shall be two times of the connecting section. The aluminum contact surface at the connecting parts shall be coated with a layer of electric complex grease. The oxide film on the surface shall be cleaned out with small wire brush and the coating shall be kept for crimp connection. (3) In event of overhead power line of 10kV and less located within the same shelf distance of, the joint on the same conducting wire shall not be more than one. The distance from the tapping position and the fixation position of the conducting wire shall be more than 0.5m. If there is shock mounting, the joint shall be out of the shocking mounting. In event of 35V overhead power line located within the same shelf distance of, there shall not be more than one straight line connecting tube and three compensating tubes on same conducting wire or lightning conductor. The distance between compensating tubes, distance between compensating tube and straight line connecting tube, and distance between straight line connecting tube (or compensating tube) and strain clamp shall not be less than 15m. (4) After the conducting wire of overhead power line of 10kV and less is tightened, the arc sinking error shall not exceed ?5% of the design arc sinking. The arc sinking between different phases of conducting wire of 35kV overhead power line or lightning protection wire shall be identical. When the allowable arc sinking error is met, the relative error of the arc sinking between different phases shall not be more than 200mm. (5) When the 10-35kV overhead power line adopts special use fixtures to connect the conduction wire, the number of the fixtures shall not be less than 2. The connecting surface shall be trim, bright and clean. After the oxide film is cleaned out, the conducting wire and the inside of the groove of special use fixtures shall be coated with electric complex grease. (6) Clearance distance between conducting wire and guy wire and between power pole and frame of the line shall not be less than 600mm in case of 35kV, not less than 200mm in case of 1-10kV and not less than 100m in case of below 1kV. 1.7 Electric Equipment on Overhead Power Line of 10kV and less (1) As to installation of pole transformer and transformer, the horizontal inclination shall be assured to be not more than 1/100 of the center distance of two trestles. (2) The falling off type fuse shall be installed firmly with trim arrangement. The angle between the axis of the fuse tube and ground vertical line shall be 15º-30º. The horizontal phase-to-phase distance shall not be less than 500mm. (3) After installation of isolating switch on the pole, the isolating edge shall be tight when switching on. After switching off, there shall be air gap of not be less than 200mm. (4) As to installation of lightning arresters on the pole, they shall be arranged trimly with identical height. The phase-to-phase distance shall not be less than 350mm in case of 1-10kV and not less than 150mm in case of below 1kV. In event that the lead wire is short and straight with tight connection, and isolated wire is used, the section shall comply with: a to upper lead wire: copper lead wire not less than 16mm and the aluminum lead wire not less than 25mm; as to down lead wire: copper lead wire not less than 25mm and the aluminum lead wire not be less than 35mm. 1.8 Power Service Line (1) As to installation of power service line of 10kV and less, the electric distance of various sections shall meet the design specification. When installing grounding down lead, grounding arresting device for interruption of contact shall be fit to measure the earth resistance in the area of 300 - 400mm above ground. (2) Service line of 1kV and less shall neither cross high voltage leads nor cross over railway. (3) The service lines of 10kV and less inducted from two different power supplies shall not be erected on the same pole. 1.9 Earth Connection (1) Connection of the grounding installation shall be reliable. Before connection, the rust and adhesive materials at the connecting parts shall be cleaned out. (2) Lap length of flat steel shall be two times of its width and the flat steel shall be welded in four sides. The lap length of the round steel shall be six times of its diameter and the round steel shall be welded in double sides. When the round steel is welded with flat steel and the flat steel is welded with angle, besides welded at the two sides of the contact part, the metal band shall be welded into bent arc (or right angle) and welded with the steel tube (or angle steel). (3) The grounding ditch shall be backfilled with the earth without rock and other rubbish and shall be tamped. Surface of back-filled groove shall be equipped with anti-settling layer with the height of 100-300mm. 1.10 Handing Over and Acceptance (1) The appearance of electrical equipment shall be complete without damage. (2) The various errors of the power pole set, arc sinking, phase-to-phase distance, relative distance, crossing distance and the distance to the building of the conducting wires shall meet the design specification. (3) The phase shall be correct and the grounding device shall comply with the regulation. (4) Following data and documents shall be submitted: As-build drawing; Certificate of the design alteration (including the detailed list of construction content); Technical record of installation (including the record of the concealed work); Record of crossing distance and correlative documents of the agreements; Record of adjusting test; Record of the measured value of the ground resistance; Correlative documents of the approval. ATTACHED ILLUMINATION: This Standard Is Kept By Technique Department. This Standard Was Prepared By Construction Management Department. THE MAIN DRAFTSMAN OF THIS STANDARD: Chen Yuping Checked by : Sun Yuanming / Wu Benlun Approved by :