CN208570356U

CN208570356U - A kind of capacitor unit design structure for high dielectric level

Info

Publication number: CN208570356U
Application number: CN201821297800.4U
Authority: CN
Inventors: 孙晓凤; 姚妍君; 王刚; 肖果; 赵洪翠
Original assignee: HERONG ELECTRIC Co Ltd
Current assignee: HERONG ELECTRIC Co Ltd
Priority date: 2018-08-13
Filing date: 2018-08-13
Publication date: 2019-03-01
Anticipated expiration: 2028-08-13

Abstract

Originally practical newly to disclose a kind of capacitor unit design structure for high dielectric level, including capacitor case, the inside of capacitor case is equipped with capacitor body, and the upper end of capacitor case is equipped with capacitor casing, is connected between capacitor casing and capacitor body by casing buttock line；The upper and lower ends of capacitor body are wound with auxiliary outer encapsulating respectively, are equipped with capacitor isolation board inside the top surface of capacitor case, dielectric support block are equipped between capacitor isolation board and the upper end of capacitor body, the outside of capacitor casing is socketed with insulating film set.It solves the problems, such as that existing capacitor major insulation is too small, it can be achieved that the single capacitor major insulation that reaches 70/170 is horizontal, realizes the direct console mode structure of 35kV single capacitor.

Description

A kind of capacitor unit design structure for high dielectric level

Technical field

The utility model belongs to power capacitor unit technical field, is related to a kind of capacitor list for high dielectric level Meta design structure.

Background technique

Capacitor is made of several parts such as fuse, shell, outgoing line porcelain bushing, and there are a joint hinge for installation in tank wall two sides, and one Side joint hinge is equipped with earth stud, and shell is welded by stainless steel plate molding, and existing capacitor comprises the following structure: 1. capacitors Fuse, 2. outer encapsulatings, 3. capacitor cases, 4. capacitor casings, 5. casing buttock lines, as shown in Figure 1.

Domestic single capacitor is designed using 10kV or 20kV, the single capacitor design without 33kV and 35kV.And state Outer client is larger to the demand of high dielectric level capacitor, especially the client of the country such as Iran, South Africa and Mexico, 33kV Direct console mode is used with 35kV system electricity container, i.e. single capacitor major insulation requires to reach 33kV and 35kV.And it is domestic Producer of the same trade uses more string structures, frame insulation for 33kV and 35kV system electricity container, and separate unit product still uses 10kV or 20kV design, and according to the requirement of the international standard of IEC60871-2005, when highest voltage for equipment is 36kV, insulate water Flat to require 70/170kV, when highest voltage for equipment is 38kV, dielectric level requires 70/200kV；It is wanted according to Mexican National Standard It asks, when the nominal voltage between terminal is 19.92kV (highest voltage for equipment 34.5kV), dielectric level requires 70/200kV.And The country temporarily can reach this standard without producer.

Utility model content

The purpose of the utility model is to provide a kind of capacitor unit design structure for high dielectric level, solve existing The problem for having capacitor major insulation too small is, it can be achieved that single capacitor reaches 70/170 major insulation level, realization 35kV separate unit The direct console mode structure of capacitor.

The utility model the technical scheme adopted is that a kind of capacitor unit design structure for high dielectric level, It is made of the major insulation outer encapsulating between capacitor terminal, core and shell, major insulation outer encapsulating includes setting and shell and core Major insulation encapsulating between body, and it is wound with auxiliary outer encapsulating, capacitor case respectively by the upper and lower ends of capacitor body Top surface inside be equipped with capacitor isolation board, between capacitor isolation board and the upper end of capacitor body be equipped with insulating supporting Block, the outside of capacitor casing are socketed with the secondary insulatings such as insulating film set and reinforce composition.

The utility model is also characterized by

Auxiliary outer encapsulating includes the polypropylene film and cable paper of successively apart windings.

Polypropylene film and the number of plies of cable paper winding are 13~20 layers, and assisting the outermost layer of outer encapsulating is cable paper.

Outer encapsulating is assisted all to wrap capacitor body from 1/5 downward height of upper end and 1/5 height upward from lower end Around.

The utility model has the beneficial effects that the utility model improves existing 35kV capacitor main insulation design, it can Realize the direct console mode of 35kV capacitor, the utility model becomes smaller to shell capacitor according to core on capacitor core body and strengthened Design concept, cross fraction in capacitor or field strength concentrated part be designed, so that solving single capacitor reaches 70/170 Main insulation design, enhance product performance.

Detailed description of the invention

Fig. 1 is existing capacitor core body to shell capacitance profile schematic diagram；

Fig. 2 is a kind of schematic diagram of capacitor unit internal design structures for high dielectric level of the utility model；

Fig. 3 is the specific schematic diagram of capacitor isolation board in Fig. 2.

In figure, 1. capacitor bodies, 2. capacitor cases, 3. capacitor casings, 4. casing buttock lines, the isolation of 5. capacitors Plate, 6. dielectric support blocks, 7. auxiliary outer encapsulatings.

Specific embodiment

The utility model is described in detail with reference to the accompanying drawings and detailed description.

The utility model is a kind of capacitor unit design structure for high dielectric level, as shown in Fig. 2, including capacitor Device shell 2, the inside of capacitor case 2 are equipped with capacitor body 1, and the upper end of capacitor case 2 is equipped with capacitor casing 3, electricity It is connected between container casing 3 and capacitor body 1 by casing buttock line 4；The upper and lower ends of capacitor body 1 are wound with auxiliary respectively Outer encapsulating 7 is helped, capacitor isolation board 5 is equipped with inside the top surface of capacitor case 2, as shown in figure 3, setting on capacitor isolation board 5 There are two for the circular hole across casing buttock line 4.Insulation is equipped between capacitor isolation board 5 and the upper end of capacitor body 1 Supporting block 6, the outside of capacitor casing 3 are socketed with insulating film set.

Assisting outer encapsulating 7 includes the polypropylene film and cable paper of successively apart windings.

Polypropylene film and the number of plies of cable paper winding are 13~20 layers, and the outermost layer of auxiliary outer encapsulating 7 is cable paper.

Auxiliary outer encapsulating 7 is whole from 1/5 downward height of upper end and 1/5 height upward from lower end by capacitor body 1 Wrapping.Assist outer encapsulating 7 by tape-stripping on capacitor body 1.The outlet terminal and capacitor case 2 of casing buttock line 4 Between be equipped with supplementary insulation, supplementary insulation wound by polypropylene film.

C in Fig. 1₀: equally distributed capacitor；C₁: the capacitor of capacitor body bottom sharp corner to capacitor case；C₂: electricity At the top of container fuse sharp corner to capacitor case capacitor；C₃: to the electricity of capacitor capping at capacitor body top center Hold；C₄: the capacitor of capacitor casing buttock line bending part to capacitor capping；C₅: capacitor casing ceramic insulator sharp corner to capacitor The capacitor of device capping.

Claims

1. a kind of capacitor unit design structure for high dielectric level, including capacitor case (2), capacitor case (2) Inside be equipped with capacitor body (1), the upper end of capacitor case (2) is equipped with capacitor casing (3), capacitor casing (3) with It is connected between capacitor body (1) by casing buttock line (4)；It is characterized by: the upper and lower ends of the capacitor body (1) point Be not wound with auxiliary outer encapsulating (7), be equipped with capacitor isolation board (5) inside the top surface of the capacitor case (2), capacitor every Dielectric support block (6) are equipped between plate (5) and the upper end of capacitor body (1), the outside of capacitor casing (3) is socketed with Insulate Membrane cover.

2. a kind of capacitor unit design structure for high dielectric level according to claim 1, it is characterised in that: institute State the polypropylene film and cable paper that auxiliary outer encapsulating (7) includes successively apart windings.

3. a kind of capacitor unit design structure for high dielectric level according to claim 2, it is characterised in that: institute The number of plies for stating polypropylene film and cable paper winding is 13~20 layers, and the outermost layer of auxiliary outer encapsulating (7) is cable paper.

4. a kind of capacitor unit design structure for high dielectric level according to claim 2, it is characterised in that: institute It states auxiliary outer encapsulating (7) and all wraps capacitor body (1) from 1/5 downward height of upper end and 1/5 height upward from lower end Around.