Extra-high voltage transformer lead shielding device

Abstract

The invention provides an extra-high voltage transformer lead shielding device comprising a first equalizer, a pressure equalizing ball and a second equalizer, wherein one end of the pressure equalizing ball is movably connected with the first equalizer, and the other end is fixedly connected with the second equalizer; parallel leads of the transformer are perforated in the first equalizer, the pressure equalizing ball and the second equalizer; a first equipotential connection line is connected between the pressure equalizing ball and the first equalizer; one segment of the parallel leads of the transformer in the pressure equalizing ball is connected out of the external lead which is educed outside the transformer through a sleeve inserted into the pressure equalizing ball; and a second equipotential connection line is connected between the first equalizer and the parallel lead. The extra-high voltage transformer lead shielding device can improve the magnetic field, is convenient to install and does not stress during pressure installation of the transformer body, thereby improving the safety in the installation process.

Description

technical field [0001] The invention relates to the field of transformers, in particular to a shielding device for lead wires of transformers. Background technique [0002] In transformers, especially for high-voltage, thinner or irregularly shaped leads, in order to improve the shape of lead electrodes, reduce electric field concentration, and increase safety factors, shielding structures are often added outside the leads. [0003] For example, in the design process of UHV and ultra-large capacity autotransformers, since the first end of the series coil is the middle outlet, the voltage level of the first end is 1000 kV, and the two ends are the ends of the series coil, and the two ends need to be connected in parallel before being drawn out. for 500 kV. The connection of the two ends must pass through the middle of the series coil. Due to the limitation of the transportation limit, the size of the fuel tank should not be too large. This will cause a tight distance between...

AI Technical Summary

Problems solved by technology

The connection between the two ends must pass through the middle of the series coil. Due to the limitation of the transportation limit, the size of the fuel tank should not be too large. This will cause a tight distance between the 500 kV upper and lower parallel leads to the series coil, fuel tank and other structural parts, and the electric field will be concentrated.

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