High-voltage power capacitor device and manufacturing method thereof

Abstract

The invention provides a high-voltage power capacitor device and a manufacturing method thereof. The device comprises an outlet sleeve, a box cover, a capacitor element, a capacitor core, a box body and insulating oil. The device is characterized in that: the capacitor core is formed by connecting capacitor elements in series and parallel by connecting plates, wherein the capacitor elements are formed by winding an aluminum foil and a polypropylene film on a winder and pressing; the capacitor core is packed by using a packing insulator and arranged in the box body; the outlet sleeve is fixed on the box cover; the connecting plates are connected with down leads of the outlet sleeve; the box cover is welded on the box body; and the insulating oil is filled in the box body. The box body of the device can be directly grounded, and the device is suitable for a common cabinet capacitor structure and is convenient to install and produce.

Description

technical field [0001] The invention relates to a power capacitor, which belongs to the technical field of high-voltage electrical appliances, in particular to a high-voltage power capacitor device and a manufacturing method thereof. Background technique [0002] A high-voltage capacitor is a kind of element mainly made of the plate and its inter-electrode medium by winding, and then the elements are combined into a capacitor core in a series-parallel form and installed in the case. The two poles of the capacitor core pass through the capacitor Casing out. High-voltage capacitors have different voltages depending on their application occasions. At present, the rated voltage of high-voltage shunt capacitors is mainly above 1kV and below 20kV. Shunt capacitors of this voltage level can be directly applied to devices of corresponding voltage levels, and the shell can be directly grounded. For devices with a voltage level higher than this, such as 35kV, capacitors with a voltag...

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Problems solved by technology

At this time, the metal frame carrying the capacitor must have a fixed potential to avoid the generation of floating potential. However, since the high-voltage shunt capacitor has only a voltage level of 10kV, and the metal frame is connected to the high-voltage shunt capacitor shell, the metal frame cannot be directly grounded.

In this way, when the high-voltage capacitor is used, a fence must be set around the periphery to avoid accidental injury; on the other hand, since the metal frame is charged, the lower part of the metal frame needs to have an insulating support to prevent it from being directly grounded, which results in a high-voltage capacitor device. Large, unable to use common cabinet capacitor device structure

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