Plastic-clad steel-frame collective capacitor with small unit without shell and installation method

Abstract

The invention provides a plastic-clad steel fully-insulated frame assembling capacitor provided with unshelled capacitor units and a mounting method. The capacitor includes an oil tank, wire outgoingsleeves, a capacitor core body and insulating oil. The capacitor is characterized in that the capacitor core body comprises a fully-insulated frame and capacitor units arranged in the frame; the capacitor units are unshelled capacitor units; the capacitor units are fixed in the fully-insulated frame through limiting plates; plastic-clad steel section bars are welded so as to form the main body ofthe fully-insulated frame; section bar welding parts are treated by means of glass fiber cloth winding, insulating bolt connection parts are sealed and insulated by means of insulating resin encapsulation, and therefore, the full insulation of the frame can be realized. The capacitor units are provided with no small shells; the capacitor units are fixed in the frame through the limiting plates soas to form the capacitor core body; and therefore, the size and weight of each capacitor unit can be further reduced, and the size and weight of the entire capacitor device can be reduced.

Description

Technical field [0001] The invention belongs to the field of power equipment, and in particular relates to a plastic-clad steel fully-insulated frame collective capacitor adopting a shell-less capacitor unit and an installation method. Background technique [0002] At present, the core frame of the integrated capacitor is usually welded by hot-rolled steel. After the welding is completed, treatments such as rust removal, partial polishing, galvanizing and rust prevention are required, and the treatment process is more complicated. At the same time, in order to ensure the electrical insulation performance of the capacitor, a certain insulation gap must be ensured between the steel frame and the capacitor metal shell, which results in a large amount of insulating oil in the fuel tank, and the overall weight and volume are relatively large. [0003] The patent document with the patent number 201410847445.3 discloses a collective capacitor with capacitor core insulation, including mutu...

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