Oil-immersed type transformer for hatch winding iron core

Abstract

The invention relates to an oil-immersed type transformer with open-ended roll-cores, which comprises an oil tank, a high-tension bushing (13), a low-tension bushing (11), an earth wire (16), an oil level indicator (15), an exhaust unit (12), a tapping switch (10) and four groups of radiating flanges (14), wherein roll-cores of the transformer are formed from two open-ended roll-cores whose sections are in semi-oblate shape and which are arranged in parallel, and an open-ended roll-core whose square-set shape section is also in the semi-oblate shape and is wrapped outside the two roll-cores. During the production process, since the roll-cores are open-ended, thereby coils can be separately winded, and the coils can be installed or replaced through opening the roll-cores from the gap of the opening during the production and the maintenance.

Description

Technical field [0001] The invention relates to the field of transformer manufacturing. Background technique [0002] Oil-immersed transformers are mainly composed of iron cores, coils and oil tanks. At present, most of the iron cores of domestic oil-immersed transformers are laminated structures, which are formed by stacking silicon steel sheets. Since the laminated iron core has many oblique seams at the joints of each layer, the reluctance and iron loss increase, the excitation current of the transformer also increases, the power factor is reduced, and the power grid is seriously affected. quality of power supply. Transformer core seams also lead to the problem of high operating noise. In order to overcome the defects of the laminated iron core mentioned above, in recent years, many manufacturers in China have adopted wound-type iron-core transformers. The transformer iron core is formed by continuous winding of silicon steel strips of a certain shape. It is reflected ...

AI Technical Summary

Problems solved by technology

The invention completely solves the disadvantages of low performance of the laminated core oil-immersed transformer and the defects in the manufacturing process of the seamless wound core oil-immersed transformer.

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