CN210777913U - Cable suitable for street lamp - Google Patents

Abstract

The utility model discloses a cable suitable for street lamp, including cable main part, A sinle silk, B sinle silk, C sinle silk, N sinle silk, first insulating layer, filling layer, first outer jacket, PE sinle silk, second insulating layer and second outer jacket, the inside of cable main part is laid and is provided with A sinle silk, B sinle silk, C sinle silk and N sinle silk, the first insulating layer has been cup jointed to the outside of A sinle silk, B sinle silk, C sinle silk and N sinle silk, the clearance department that the inside of cable main part lies in between each sinle silk first insulating layer is filled with the filling layer; the cable just separates the cable of A sinle silk, B sinle silk, C sinle silk and N sinle silk from the cable of PE sinle silk very easily in the cable shaft, does not destroy insulating layer and sheath again, makes things convenient for the measurement of cable zero sequence current, and makes things convenient for the investigation of street lamp circuit trouble, improves efficiency and the security of looking for the street lamp circuit trouble greatly, does not influence cable auxiliary facilities worker yet, can become the special cable of street lamp trade even.

Description

Cable suitable for street lamp

Technical Field

The utility model relates to the technical field of cables, specifically be a cable suitable for street lamp.

Background

The cable is usually by several wire mutual insulation to have insulating protective layer at whole outside package, the cable has interior circular telegram, the characteristics of external insulation, 5 core (A, B, C, N, PE) cables that current street lamp cable mostly adopted, its structure generally is that a cable distributes and has 5 heart yearns (conductors) including a PE sinle silk (earth connection), the outside of every heart yearn wraps up a layer insulating layer, the outermost cover has the protective layer.

When the fault of the street lamp cable is checked, a method for measuring residual current is usually adopted, the residual current needs to be measured by A, B, C, N four-core residual current, and the cable inlet and outlet ends in the lamp post are clearly separated to avoid confusion, so that the residual current can be accurately measured; but the space of most present light pole hand hole door department is less, it is comparatively difficult to survey A, B, C, N four-core residual current, PE line and other four-core wrap up an organic whole again among the current cable structure, can't be in the light pole cable business turn over cable shaft measuring residual current, be unfavorable for street lamp cable ground fault's investigation, consequently propose a section cable suitable for street lamp, carry out appropriate change with current 5-core cable structure, conveniently measure supply cable's residual current in the cable shaft, find out the residual current sudden change point, thereby judge the specific scope of ground fault point, it is very meaningful to seeking street lamp circuit ground fault.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a cable suitable for street lamp to solve the problem that proposes in the above-mentioned background art.

In order to solve the technical problem, the utility model provides a following technical scheme: the utility model provides a cable suitable for street lamp, includes cable main part, A sinle silk, B sinle silk, C sinle silk, N sinle silk, first insulation layer, filling layer, first outer jacket, PE sinle silk, second insulating layer and second outer jacket, the internal layout of cable main part has been provided with A sinle silk, B sinle silk, C sinle silk and N sinle silk, the first insulation layer has been cup jointed to the outside of A sinle silk, B sinle silk, C sinle silk and N sinle silk, the clearance department that the inside of cable main part is located between each sinle silk first insulation layer is filled with the filling layer, first outer jacket has been cup jointed to the outside of filling layer, the outside one side of cable main part is provided with the PE sinle silk, the second insulating layer has been cup jointed to the outside of PE sinle silk, the second outer jacket has been cup jointed to the outside of second insulating layer, the second.

Furthermore, the colors of the first insulating layers sleeved outside the wire cores A, B, C and N are respectively yellow, green, red and blue.

Furthermore, the color of the second insulating layer sleeved outside the PE wire core is black.

Further, the cable is at 20⁰And at the environmental temperature C, the phase insulation is not lower than 30M omega, and at any environmental temperature, the phase insulation is not lower than 10M omega.

Compared with the prior art, the utility model discloses the beneficial effect who reaches is: the utility model discloses a cable second outer sheath glues glutinous each other with one side outer wall of first outer sheath, tears very easily, makes the cable part the cable of A sinle silk, B sinle silk, C sinle silk and N sinle silk and the cable of PE sinle silk very easily in the cable shaft. The cable can be used for conveniently and accurately measuring the residual current of the ABCN in a cable well under the condition of not damaging the outer protective layer of the cable, finding out the mutation point of the value of the residual current, quickly judging the specific range of the ground fault of a cable line, greatly improving the efficiency and the safety of searching the ground fault of the street lamp cable, not influencing the cable auxiliary facility work, and even becoming a special cable in the street lamp industry.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic plan view of the cross section of the present invention;

FIG. 2 is a schematic cross-sectional structure of another embodiment of the present invention;

in the figure: 1. a cable body; 2. a, a wire core; 3. b, a wire core; 4. c, a wire core; 5. n wire cores; 6. a first insulating layer; 7. a filling layer; 8. a first outer jacket layer; 9. a PE wire core; 10. a second insulating layer; 11. and a second outer protective layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a cable suitable for a street lamp comprises a cable main body 1, an A wire core 2, a B wire core 3, a C wire core 4, an N wire core 5, a first insulating layer 6, a filling layer 7, a first outer protection layer 8, a PE wire core 9, a second insulating layer 10 and a second outer protection layer 11, wherein the A wire core 2, the B wire core 3, the C wire core 4 and the N wire core 5 are arranged in the cable main body 1, the first insulating layer 6 is sleeved outside the A wire core 2, the B wire core 3, the C wire core 4 and the N wire core 5, the filling layer 7 is filled in a gap between the first insulating layers 6 of the wire cores in the cable main body 1, the first outer protection layer 8 is sleeved outside the filling layer 7, the PE wire core 9 is arranged on one side of the outer portion of the cable main body 1, the second insulating layer 10 is sleeved outside the PE wire core 9, the second outer protection layer 11 is sleeved outside the second insulating layer 10, the second outer protection layer 11 is adhered to the outer wall, the colors of the first insulating layers 6 sleeved outside the wire cores A2, B3, C4 and N5 are respectively yellow, green, red and blue, and the identification of each wire core during the fault detection of the cable is facilitated through the difference of the colors of the first insulating layers 6 sleeved outside the wire cores; the color of the second insulating layer 10 sleeved outside the PE wire core 9 is black, the PE wire core 9 is conveniently identified through the mark of the black color of the second insulating layer 10, the thickness of the first insulating layer 6 and the thickness of the second insulating layer 10 are 3mm, mutual noninterference between the wire cores is guaranteed, and the insulativity is guaranteed; this cable suitable for street lamp changes traditional 5 core cables into: the 4-core cable (A, B, C, N) is a conductor, the outside of the conductor is sleeved with the first insulating layer 6, and the outside of the conductor is sleeved with the first outer protective layer 8 to form a 4-core cable; the PE wire (grounding wire) is also made into a cable form, the inner part is a PE wire core 9, the outer part is a second insulating layer 10, and then the outer part is a second outer protective layer 11, the outer walls of the first outer protective layer 8 of the 4-core cable and the outer wall of one side of the second outer protective layer 11 of the PE wire are mutually adhered together, and are easily separated without damaging the protective layers, as shown in figure 1, if the PE wire (grounding wire) is easily installed on a cable frame, other shapes such as figure 2 and the like can be considered on the premise of not influencing the easy separation of the PE wire and the 4-core cable; when the cable is arranged in an auxiliary mode, the A, B, C, N, PE wires are arranged in an auxiliary mode at the same time, and the problem that the single-core PE cable is easily damaged or even broken due to the fact that the strength of the cable is not enough when the single-core PE cable is only arranged in an auxiliary mode is solved; and the cable of the A core 2, the B core 3, the C core 4 and the N core 5 is easily separated from the cable of the PE core 9 in the cable well, so that the residual current of the ABCN can be accurately measured in the cable well conveniently without damaging the outer protective layer of the cable, the mutation point of the value of the residual current can be found, the specific range of the ground fault of the cable line can be rapidly judged, the efficiency and the safety of finding the ground fault of the street lamp cable can be greatly improved, the auxiliary work of the cable can not be influenced, and the cable can even become a special cable in the street lamp industry. In a three-phase power supply system of the TN-S street lamp, 5-core cables are used, wherein PE wires are connected with shells of all street lamp poles, and grounding electrodes are additionally arranged at the head, the tail, branches and proper positions to ensure safety; for a TT power supply system, a 4-core cable can be used, but the grounding resistance of a single pole is required to be lower than 4 omega, which is very difficult to achieve, so that the grounding resistance of equipment shells such as lamp poles and the like is not more than 4 omega by connecting the equipment shells; the method for connecting the shells is many, and the most safe and effective method is to connect the shells of the electrical equipment by using PE wires in a 5-core cable, so that the TT power supply system can also use the 5-core cable, and only N and PE wires in the street lamp power transformation and distribution cabinet are separated; these two kinds of power supply mode all need use 5 core cables, when needs seek ground fault through measuring ABCN residual current, just need to part PE line and ABCN heart yearn, this novel cable if can produce and apply to the street lamp trade, in order to judge street lamp power supply cable ground fault's concrete position, need measure power supply cable ABCN residual current with the heavy-calibre pincerlike leakage current meter that the precision is higher (resolution ratio is more than 0.1 mA), and the space is narrow in the lamp pole, it is difficult to measure with this kind of measuring instrument, can measure with flexible pincerlike current meter, but measurement accuracy is not enough, only the residual current more than 10mA can accurately be measured. If measure the residual current in the cable shaft of every lamp pole cable business turn over line, nevertheless because of the PE line of current five-core cable all wraps within the outer sheath, in order to measure ABCN's residual current, just have to peel off the cable outer jacket, the humid environment of cable shaft can influence the cable insulation like this, causes the action of power supply line residual current protector even, and each heart yearn is difficult to get into the lamp pole through the poling wiring after the outer jacket is peeled off in addition, causes the construction difficulty. The cable can be used for conveniently measuring the residual current of the ABCN in a cable well under the condition of not damaging the outer protective layer of the cable, finding out the mutation point of the value of the residual current, quickly judging the specific range (between two lamp posts) of the ground fault of the cable line, greatly improving the efficiency and the safety of searching the ground fault of the street lamp cable, not influencing the auxiliary facilities of the cable, even becoming a special cable in the street lamp industry, greatly improving the efficiency and the safety of searching the ground fault of the street lamp line, and certainly being widely applied, and certainly, other industries can also be applied if the same requirements exist. The cable for the street lamp single-phase power supply system can also be applied by reference.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (4)

1. The utility model provides a cable suitable for street lamp, includes cable main body (1), A sinle silk (2), B sinle silk (3), C sinle silk (4), N sinle silk (5), first insulating layer (6), filling layer (7), first outer jacket (8), PE sinle silk (9), second insulating layer (10) and second outer sheath (11), its characterized in that: the cable comprises a cable body (1), wherein an A wire core (2), a B wire core (3), a C wire core (4) and an N wire core (5) are arranged in the inner portion of the cable body (1), a first insulation layer (6) is sleeved outside the A wire core (2), the B wire core (3), the C wire core (4) and the N wire core (5), a filling layer (7) is filled in a gap between the first insulation layers (6) of the wire cores in the cable body (1), a first outer protection layer (8) is sleeved outside the filling layer (7), a PE wire core (9) is arranged on one side of the outer portion of the cable body (1), a second insulation layer (10) is sleeved outside the PE wire core (9), a second outer protection layer (11) is sleeved outside the second insulation layer (10), and the second outer protection layer (11) is adhered to the outer wall of one side of the first outer protection layer (8).

2. A cable suitable for street lamps according to claim 1, characterized in that: the color of the first insulating layer (6) which is sleeved outside the A wire core (2), the B wire core (3), the C wire core (4) and the N wire core (5) is yellow, green, red and blue respectively.

3. A cable suitable for street lamps according to claim 1, characterized in that: the color of a second insulating layer (10) sleeved outside the PE wire core (9) is black.

4. A cable suitable for street lamps according to claim 1, characterized in that: the cable has an ambient temperature of 20 deg.C⁰And C, the phase insulation is not lower than 30M omega, and the phase insulation is not lower than 10M omega at any ambient temperature.

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