Installation Scheme of dry-type transformer

The installation of dry-type transformer should pay attention to the problem is more, the installation of good or bad will affect the use of the future, so the installation of dry-type transformer we need to pay attention to some of the main details. Dry-type transformer installation to implement a set of major technical specifications and programs, do not mess like a pot of Porridge, so that the dry-type transformer will not be safe. The installation of dry-type transformers requires a set of common construction schemes, which are as follows:

　　一、设备及材料准备

　　干式变压器应装有铭牌。铭牌上应注明制造厂名、额定容量，一二次额定容量，一二次额定电压，电流，阻抗，电压%及接线组别等技术数据。

　　干式变压器的容量，规格及型号必须符合设计要求。附件备件齐全，并有出厂合格证及技术文件。

　　型钢：各种规格型钢应符合设计要求，并无明显锈蚀。

　　螺栓：除地脚螺栓及防震装置螺栓外，均应采用镀锌螺栓，并配相应的平垫圈和弹簧垫。

　　其它材料：电焊条，防锈漆，调和漆等均应符合设计要求，并有产品合格证。

　　二、主要机具

　　搬运吊装机具：汽车吊，汽车，卷扬机，吊链，三步搭，道木，钢丝绳，带子绳，滚杠。

　　安装机具：台钻，砂轮，电焊机，气焊工具，电锤，台虎钳，活扳子、鎯头，套丝板。

　　测试器具：钢卷尺，钢板尺，水平尺，线坠，摇表，万用表，电桥及测试仪器。

　　三、作业条件

　　施工图及技术资料齐全无误。

　　土建工程基本施工完毕，标高、尺寸、结构及预埋件强度符合设计要求。

　　屋面、屋顶喷浆完毕，屋顶无漏水，门窗及玻璃安装完好。

　　室内粗制地面工程结束，场地清理干净，道路畅通。

　　四、操作工艺

　　设备点检查

　　设备点件检查应由安装单位、供货单位、会同建设单位代表共同进行，并做好记录。

　　按照设备清单，施工图纸及设备技术文件核对干式变压器本体及附件备件的规格型号是否符合设计图纸要求。是否齐全，有无丢失及损坏。

　　干式变压器本体外观检查无损伤及变形，油漆完好无损伤。

　　绝缘瓷件及环氧树脂铸件有无损伤、缺陷及裂纹。

　　干式变压器二次搬运

　　干式变压器二次搬运应由起重工作业，电工配合。******采用汽车吊吊装，也可采用吊链吊装。

　　干式变压器搬运时，应注意保护瓷瓶，******用不箱或纸箱将高低压瓷瓶罩住，使其不受损伤。

　　干式变压器搬运过程中，不应有冲击或严重震动情况，利用机械牵引时，牵引的着力点应在干式变压器重心以下，以防倾斜，运输倾斜角不得超过15度，防止内部结构变形。

　　大型干式变压器在搬运或装卸前，应核对高低压侧方向，以免安装时调换方向发生困难。

　　干式变压器稳装

　　干式变压器就位可用汽车吊直接甩进干式变压器室内，或用道木搭设临时轨道，用三步搭、吊链吊至临时轨道上，然后用吊链拉入室内合适位置。

　　干式变压器就位时，应注意其方位和距墙尺寸与图纸相符，允许误差为±25mm,图纸无标注时，纵向按轨道就位，横向距墙不得小于800mm，距门不得小于1000mm。

　　附件安装

　　Equipment and material preparation, dry-type transformer should be equipped with nameplate. Nameplate should indicate the manufacturer, rated capacity, primary and secondary rated capacity, primary and secondary rated voltage, current, impedance, voltage% and wiring group and other technical data. The capacity, specifications and models of dry-type transformers must meet the design requirements. Accessories spare parts complete, and have the factory certificate and technical documents. Section steel: All kinds of specification section steel should meet the design requirements, no obvious corrosion. Bolts: Galvanized Bolts with corresponding plain washers and spring washers shall be used except anchor bolts and shock absorber bolts. Other materials: Electric Welding Rod, antirust paint, blending paint and so on should meet the design requirements, and have product qualification certificate. Two, the main machines and tools, handling and hoisting machinery: Car Crane, car, hoist, hanging chain, three-step, road wood, wire rope, belt rope, roll bar. Installation Equipment: table drill, grinding wheel, welding machine, gas welding tools, electric Hammer, table vice, spanner, Hammer, wire plate. Testing instruments: steel tape measure, steel plate ruler, level ruler, wire drop, swing table, multimeter, electric bridge and testing instruments. Working Conditions, construction drawings and technical data are complete and correct. Civil Engineering Construction is basically completed, elevation, size, structure and embedded parts in accordance with the intensity of design requirements. Roof, roof grouting finished, no leakage roof, doors and windows and glass installed in good condition. The indoor rough ground work is finished, the site is cleaned up and the roads are unblocked. Operation Technology, equipment spot inspection, equipment spot inspection shall be jointly carried out by the installation unit, the supply unit and the representatives of the construction unit, and good records shall be made. Check the specifications and models of dry-type transformer body and accessories according to the equipment list, construction drawings and equipment technical documents. Is it complete, is it lost or damaged. Dry-type transformer body appearance inspection is not damaged and deformed, paint intact no damage. Whether there is any damage, defect or crack in insulating porcelain and epoxy casting. Dry-type transformer secondary handling, dry-type transformer secondary handling should work by lifting, electrician with. * * * * * * * * It can be lifted by truck or by chain hoist. When handling dry-type transformers, care should be taken to protect the porcelain bottles, * * * * * * * * * * Cover the high and low voltage porcelain bottles with no boxes or cartons so as not to damage them. When mechanical traction is used, the traction point should be below the center of gravity of the dry-type transformer in order to prevent tilt, and the transportation tilt angle should not exceed 15 degrees, to keep the interior from deforming. Large dry-type transformer in handling or loading and unloading, should check the high and low voltage side direction, in order to avoid installation when the direction of the switch difficulties. Dry-type transformer stable installation, dry-type transformer in place can be directly thrown into the dry-type transformer room with a car crane, or with a wooden track set up temporary track, with three-step, hanging chain hanging to the temporary track, and then use the hanging chain to pull into the room appropriate location. When the dry-type transformer is in position, it should be noticed that its Azimuth and distance from the wall are in accordance with the drawing, the allowable error is ± 25mm, when the drawing is not marked, the longitudinal direction should be in position according to the track, the transverse distance from the wall should not be less than 800mm, and the distance from the door should not be less than 1000mm. Accessories installation, dry-type transformer handover test, dry-type transformer handover test content: measuring the DC resistance of the coil together with the casing; Check the connection group of the three-phase dry-type transformer and the polarity of the lead-out wire of the single dry-type transformer; measure the insulation resistance of the coil with the bushing; do the AC withstand voltage test with the coil and the bushing. Dry-type transformer before power supply check, dry-type transformer before power supply test run to do a comprehensive check, confirm that the test run conditions can be put into operation. Before the dry-type transformer is put into trial operation, it must be checked and qualified by the quality supervision department. The above are the main construction schemes and construction procedures for the installation of common dry-type transformers for everyone's reference, and attention should be paid to the installation of dry-type transformers, more information please contact our small make up a detailed understanding of it!