Transformer for oil insulation test
A test and transformer technology, applied in transformers, fixed transformers, transformer/inductor cores, etc., can solve the problems of heavy weight and large volume, and achieve the advantages of reducing volume and weight, reducing production cost, and reducing length. Effect
Inactive Publication Date: 2010-12-22
武汉特试特电气有限公司
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Problems solved by technology
[0005] The object of the present invention is to provide a transformer for oil insulation test with small size and light weight in order to overcome the shortcomings of large volume and heavy weight of the existing oil insulation test transformer
Method used
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Embodiment Construction
[0015] Such as figure 2 As shown, the structural components of the transformer used for the oil test of the present invention include a high and low voltage winding 2, an iron core 1, a cavity 5, a bushing 3, a pressure equalizing cover 4, an insulating medium 6, and a connecting terminal 7; their positional relationship is that the high and low voltage Winding 2 is wound on a section of iron core 1, this part is located in cavity 5, the part of iron core 1 not wrapped by high and low voltage winding 2 is located outside cavity 5, cavity 5 is made of insulating material, and the inside is filled with insulating medium 6. The bushing 3 is connected to the cavity 5 and is located above the cavity 5. The pressure equalizing cover 4 is connected to the bushing 3. The terminal 7 leading out of the cavity 5 is located on the seat supporting the cavity.
[0016] During the specific implementation process, the outer layers of the iron core 1 can be fixed together by a fixing device t...
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The invention relates to a transformer for an oil insulation test, comprising an iron core, a high-low voltage winding, a sleeve, a voltage equalizing hood, a cavity, insulation oil and wiring terminals. The cavity is filled with the insulation oil. The transformer for the oil insulation test is characterized in that the high-low voltage winding and the iron core wrapped by the same are arranged in the cavity, and the rest part of the iron core is arranged outside the cavity which is made from an insulation material. The high-low voltage winding and the iron core wrapped by the same are arranged in the insulation cavity, and the rest part of the iron core is arranged outside the cavity so that the size of the cavity is greatly decreased to decrease the size and the weight of the insulation oil filled in the cavity. Because of the insulation performance of the cavity, the transformer lowers the requirement on the insulation performance of the sleeve and reduces the length and the size of the sleeve, thereby reducing the size and the weight of the transformer for the whole oil insulation test.
Description
technical field [0001] The invention relates to a test transformer, in particular to a small volume and light weight oil insulation test transformer. technical background [0002] The transformer for oil insulation test is mainly composed of iron core, high and low voltage windings, bushing, equalizing cover, cavity, insulating medium, and terminals, and the cavity is filled with insulating oil. At present, the cavity of the domestic insulating oil test transformer is generally made of metal materials, and the entire part of its high and low voltage windings and iron core is in the cavity. [0003] Because the cavity contains the entire iron core and winding, it is usually large in size, and the entire cavity is filled with insulating medium, so the test transformer made of it is heavy. Since the cavity is made of metal, in order to prevent surface discharge and air discharge between the equalizing cover and the cavity during boosting, the insulation performance of the bush...
Claims
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IPC IPC(8): H01F30/06H01F27/26H01F27/00
Inventor 汪泓
Owner 武汉特试特电气有限公司