Three-phase autotransformer wholesale

Product Summary: How it works: The principle of electromagnetic induction, induced by the electromagnetic interaction, the transformation of voltage, current and impedance parameters Rated Capacity: 5 to 1600KA high voltage: 11 / 10.5 / 10 / 6.3KV low-voltage: 0.4KV impedance voltage: 4 / 4.5 % Product Description ?? working principle of electromagnetic induction principle, the use of electromagnetic mutual induction, the transformation of voltage, current and impedance structure consisting of 1:??? is the body (including the core, the winding, insulation, lead 2: Transformer oil? 3: Tank ? 4: cooling device 5:? regulating device? 6: protection (absorption, safety airways, gas relay, storage cabinets and temperature measuring devices, etc.) 7:? bushing important components in detail ???? ?????? 1, the core material: core material of transformers used mainly iron, low silicon, high silicon steel sheet can be reduced by adding silicon steel sheet conductivity, electrical resistivity increased, which reduces eddy to loss reduction. We usually called plus the quality of silicon is silicon steel, the quality of the transformer silicon steel sheet used in a great relationship, the quality of silicon is usually represented by magnetic flux density B, general Iron sheet B is 6000-8000, low silicon wafer 9000-11000, 12000-16000 high silicon wafer, ???????? 2, wound transformers are usually used materials are:? enameled wire, sandbags wire, silk envelope, the most commonly used wire for wire requirements, good conductivity, insulating paint has sufficient heat resistance, and have a certain degree of corrosion resistance. Under normal circumstances the best models of high strength with Q2 ???????? 3 polyester enameled wire, insulation materials:? in winding transformer coil frame interlayer isolation by winding between insulating materials are to be used, general transformer frame material available Phenolic paperboard, interlayer available Mylar or telephone paper for isolation, winding through the available yellow wax cloth for isolation ??????? 4, impregnating material:?? After winding transformer, but also over the last a process that is impregnated with insulating paint, it can enhance the mechanical strength of the transformer, improve the insulation performance, long life, under normal circumstances, can be used as impregnating material cresol varnish.? Technical parameters Rated ????????? Capacity: 5 to 1600KA ???????? high voltage: 11 / 10.5 / 10 / 6.3KV ???????? low-voltage: 0.4KV ????????? impedance voltage:? 4 / 4.5%? First, the economic significance of the transformer maintenance ??????? 1, based on the experience of management and operational departments transformer, the transformer before running lO years, especially in the first three years, the failure rate is the highest run.? ???????? 2, depending on the operating experience of American power sector, for 765kV EHV transformer, the high failure rate of early runs. There are many fail in the first few days of operation, or even just put into operation within a few hours, even a few of minutes. Emphasis must be put into operation in the early running transformer maintenance. While in the initial phase of operation, maintenance and replacement of parts takes some costs, but these costs are consumed for timely or flaws found earlier to avoid serious consequences later it is valuable. ? ???????? 3, proved good maintenance program can extend the life of the transformer. Therefore, to maintain the economic significance of the development of maintenance programs is to extend the transformer life. ? Second, the maintenance of strategic ??????? transformer transformer maintenance strategies are generally three types: predictive maintenance, preventive maintenance, state of maintenance. ? ??? Predictive maintenance is the use of automatic alarm diagnostic device for transformer monitoring. Predictive maintenance needs the state analysis of the ways and means. For example, the performance indicators transformer oil analysis, infrared detectors, the transformer do visual inspection, oil dissolved gas analysis. ? ?????? A periodic preventive maintenance, periodic maintenance strategy. It includes planned maintenance, for example, regularly conduct various testing transformer, the transformer live as planned test and online monitoring. Preventive maintenance is the state after the analysis, by the manufacturers time to develop a Maintenance performed. ? ?????? State maintenance is a problem for transformer maintenance. It requires detailed analysis, inspection, repair or replace the transformer need replacement parts for maintenance.