CN201174275Y

CN201174275Y - Environment protection type shielding electric cable for electric power

Info

Publication number: CN201174275Y
Application number: CNU2007200816848U
Authority: CN
Inventors: 郑锚
Original assignee: SICHUAN CHUANTAI CABLE CO Ltd
Current assignee: SICHUAN CHUANTAI CABLE CO Ltd
Priority date: 2007-10-30
Filing date: 2007-10-30
Publication date: 2008-12-31
Anticipated expiration: 2017-10-30

Abstract

An environment-friendly electric shielded cable is characterized in that the center of the cable is provided with a conducting wire, three master cores, three ground wires and an insulating layer which are intertwisted into a cable; the outside of a finished cable is coated with an inner sheath or is wound with a belting with clearances provided with fillers; the outside of an inner protective layer is provided with woven copper wires or is wound with a copper strip so as to form a shielding layer with the ground wires; the shielding layer is provided with a bare copper wire; the outermost layer of the cable is provided with a sheath; and the shape of a cross section of a conductive core is rounded or corrugated. The environment-friendly electric shielded cable can replace an ordinary wire cable, and is used in a place requiring for electromagnetic compatibility; moreover, the shielded cable is particularly suitable to be used in an electric energy transmission line inside a variable frequency speed regulation circuit.

Description

Environment-friendly type electric power shielded type cable

Technical field

The utility model relates to the electric wire field, belongs to the electric wiring distribution connection electric wire that transmits electric power specifically, is specially adapted to the motor wiring of frequency control loop and uses.

Background technology

At present along with the raising of all trades and professions automaticity, in addition standard both at home and abroad obtains confirming to " electromagnetic compatibility " this negligible in the past problem and is formulated standard.Originally can not satisfy present requirement as the used plain edition electric wire of transferring electric power, particularly in the frequency conversion loop because unavoidably exist high order harmonic component to disturb, the contiguous distribution line electrical system of interference effect brings hidden danger for the normal operation of whole system by transmission channel (electric wire).

Summary of the invention

The purpose of this utility model is to make and structure by changing electric wire, provides a kind of antijamming capability strong and self externally do not produce a kind of environment-friendly type electric power shielding wire cable that disturbs.

For finishing above-mentioned technical scheme that purpose is taked: the inside of whole cable is made up of three main traverse lines and earth connection (or zero line), and extruded insulation layer separately, arrange stranding in accordance with regulations, the stranding extexine extrudes sheath or wrapped band, place between core and fill, band external application copper cash braiding (or copper strips is wrapped) screen, outermost extrudes outer jacket.Earth connection addition cross section in above-mentioned screen and the layer should be not less than 50% of main core section.The core cross section is circle or corrugation shape simultaneously.

The utility model can not produce to external world when electric energy transmitting and disturbs, and anti-simultaneously external disturbance performance is preferable, particularly uses the starting performance (reducing the motor shaft current affects) that can improve motor in the frequency conversion loop.

The utility model embodiment is described in detail in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is second embodiment structural representation when only establishing zero line and core; Fig. 2-A is a pie diagram for the core cross section, and Fig. 2-B is a corrugation shape structure for the core cross section;

Fig. 3 is that the 3rd embodiment is for only establishing three cores and three ground configurations schematic diagrames.

Embodiment

According to Fig. 1, the electric wire center is established insulated conductor (6) and is made the zero line core, three master cores (1) and three ground wires (5) and respectively establish insulating barrier (2), and stranded stranding, the stranding outside extrudes inner sheath or wrapped band (5), the gap is provided with filling (4), braiding copper wire or copper strips wrapped (7) are established in the sheath outside, (7) form screen with (3) or (6), establish bare copper cash (8) in screen and the band, the cable outermost layer is established oversheath (9), and conductor wire core (1) cross sectional shape is circle or corrugation shape.

Embodiment two: as shown in Figure 2, remove three among Fig. 1 according to earth connection (3), be applicable to 10-100mm when promptly only establishing zero line (6) and three conductor wire cores (1) ²The cable core cross section.

Embodiment three: as shown in Figure 3, remove the middle zero line (3) among Fig. 1, be applicable to 50-240mm when promptly only establishing three conductor wire cores (1) and three ground wires (3) ²The cable core cross section.

The utility model substitutes the common wiring cable and uses in the occasion that electromagnetic compatibility is had requirement, is specially adapted to use in the circuit of transmission of electric energy in the frequency control loop.

Claims

1 one kinds by conductor wire core, insulating barrier, screen, the environment-friendly type electric power shielded type cable that sheath is formed, it is characterized in that cable center establishes insulation zero line core (6), three conductor wire cores (1), with three earth connections (3) extruded insulation layer (2) separately, and stranding is stranded, band (5) is set behind the stranding, the gap is provided with filling (4), braiding copper wire or copper strips (7) are established in band (5) outside, braiding copper wire or copper strips (7) are formed screen with three earth connections (3) or zero line (6), bare copper wire (8) is set between screen and band, the outermost of cable is established oversheath (9), and the total sectional area of above-mentioned screen is 50% of single conductor wire core cross section.

2 environment-friendly type electric power shielded type cables according to claim 1 is characterized in that conductor wire core (1) is arranged to circle or tile distracted shape.

3 environment-friendly type electric power shielded type cables according to claim 1 is characterized in that being applicable to 10-100mm ²The cable core cross section for only establishing the cable of zero line (6) and three conductor wire cores (1).

4 environment-friendly type electric power shielded type cables according to claim 1 is characterized in that being applicable to 50-240mm ²The cable core cross section for only establishing the cable of three conductor wire cores (1) and three earth connections (3).