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PRODUCTS
 Autotransformer |
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 Standard Specification |
| Auto Transformer 0SG autotransformer - single / three phase auto boost / vacuum transformer. Autotransformer is only one winding of the transformer, when used as a step-down transformer, part of line out from the winding turns as the secondary winding; when used as a step-up transformer, only added to the applied voltage winding - part of the line turns on. Usually belong to that part of primary and secondary windings as common winding, and the rest as the series winding, with the capacity of self-coupling transformer, compared with ordinary transformer, not only small size and high efficiency, and transformer capacity greater The higher the voltage. This advantage will become even more prominent. Thus, as the development of power system, voltage levels to enhance and increase transmission capacity, since the coupling transformer because of its large capacity, low loss, low cost and widely used. (1) the calculation of the auto-transformer capacity is less than the rated capacity. Therefore, in the same rated capacity, the main autotransformer smaller, the effective material (steel sheet and wire) and the structural material (steel) are correspondingly reduced, thereby reducing costs. Effectively reduce the material makes the copper loss and iron loss is reduced accordingly, so the higher the efficiency of the autotransformer. At the same time reducing the size and quality of the major decrease, you can create conditions to allow the transport capacity of a single larger transformer. But usually only in the auto-transformer k ≤ 2, the above advantages became apparent. (2) The auto-transformer short-circuit impedance value than the standard two-winding transformer is small, so the voltage change was smaller, but higher short-circuit current. (3) The auto-transformer, the second direct link between the power, when the high-pressure Ceguo voltage will cause a serious over-voltage low-voltage side. To avoid this danger, the first and second arrester must be installed, do not believe that primary and secondary windings are connected in series, one has been installed, the second can be omitted. (4) in the general transformer. OLTC devices are often connected to the grounding of the neutral point, so that the voltage regulating device can be lower than when the line-side surge. The autotransformer neutral point voltage side of the surge will bring the so-called related issues. Therefore, the required load tap autotransformer, the only way of using line-side surge. |