CN2115571U

CN2115571U - Power cable

Info

Publication number: CN2115571U
Application number: CN 91230589
Authority: CN
Inventors: 张湘平; 唐朝荣
Original assignee: BAOSHENG CABLE FACTORY JIANGSU PROV
Current assignee: BAOSHENG CABLE FACTORY JIANGSU PROV
Priority date: 1991-11-23
Filing date: 1991-11-23
Publication date: 1992-09-09

Abstract

The utility model discloses a power cable used for alternate current, a transmission and distribution circuit of a three-phase five-wire system with a rated voltage of 0.6/1KV or less than 0.6/1KV and a transmission circuit needing combustion resisting performance. The utility model is composed of a five core wires, wherein, the middle core wire is circular, the side core wires are one part of a circular ring and form a circular ring when combined together, and five cores have equal sectional planes or unequal sectional planes. The cable avoids the defects that a neutral wire and a ground wire of the previous four-core cable are the same wire, and the four-core cable has unstable system and unsafe operation, and avoids the defects of inconvenient construction and high cost in the process of laying one four-core wire and one single-core wire.

Description

Power cable

The utility model relates to employed cable in the distribution line, be particularly useful for exchanging, the electric line of rated voltage 0.6/1KV and following three-phase five-wire mode system, and need have flame-retardant can electric line.

At present, electric line often adopts three-phase four wire system, and a quad lays, and the neutral line is also made ground wire and used, and system's instability operate dangerously, for assurance safety, now uses the Three-phase five-wire system instead.But do not have five-core cable in the Three-phase five-wire system, common way is that one is four-core with two cable layings, and one is single core, and single core is made earth connection and used.Owing to lay twice, increase cost, and construction inconvenience.

The purpose of this utility model is a kind of 5-core power cable of design, only needs a laying installation to get final product success, because the neutral line separates with ground wire, system's operation is more stable.

The utility model has five cores, and one is SMIS, in addition four-core be distributed in it around, a layer insulating is all wrapped up in each core outside, the outside of five cores is sheaths.The cross sectional shape of middle heart yearn is circular, and all the other four parts that the core cross sectional shape is respectively an annulus be a complete annulus altogether, and annulus are concentric with SMIS.The sectional area of five heart yearns equates, or wherein four core section equate that another is less, or three core section long-pending equating, two core section long-pending equating in addition, and less than the sectional area of three heart yearns.

In the use,, the core of sectional area minimum is made ground connection core and neutral core for the long-pending five-core cable of unequal section.

Technical characterstic of the present utility model and result of use.

1, the utility model is simple in structure, and is easy to manufacture

2, only need establish a cable, promptly connect the neutral line and earth connection, and therefore two lines separately, increased safety, system is stable, and has reduced cost, has made things convenient for installation.

The utility model is described in further detail below in conjunction with accompanying drawing: accompanying drawing 1 is the prismatic power cable structural representations of five cores, and 1 is middle heart yearn among the figure, the 2nd, and limit heart yearn, the 3rd, insulating barrier, the 4th, sheath.

Accompanying drawing 2 is that four core sectional areas equate, the power cable that another core sectional area is less, and 5 is middle heart yearns among the figure, the 6th, limit heart yearn, the 7th, insulating barrier, the 8th, sheath.

Accompanying drawing 3 is that three core sectional areas equate, two core sectional areas equate in addition, and the core sectional area of back is less than the core sectional area of front, and Fig. 9 is middle heart yearn, the 10th, and limit heart yearn, the 11st, insulating barrier, the 12nd, sheath.

Claims

1, a kind of power cable, it is characterized in that having five cores, one is middle heart yearn, all the other four-cores be distributed in it around, a layer insulating is all wrapped up in each core outside, outermost is a sheath.

2, the power cable of narrating according to claim 1 is characterized in that the cross sectional shape of heart yearn is circular in the cable, and all the other four core section shapes are respectively the part of annulus, are a complete annulus altogether, and concentric with SMIS.

3, the power cable of narrating according to claim 1 is characterized in that five core section are long-pending equal; Or wherein four core cross sections equate that another sectional area is less; Or wherein three core section are long-pending equal, and two core section are long-pending equal in addition.