CA2735305A1 - Opgw based on al-59 - Google Patents
Opgw based on al-59 Download PDFInfo
- Publication number
- CA2735305A1 CA2735305A1 CA 2735305 CA2735305A CA2735305A1 CA 2735305 A1 CA2735305 A1 CA 2735305A1 CA 2735305 CA2735305 CA 2735305 CA 2735305 A CA2735305 A CA 2735305A CA 2735305 A1 CA2735305 A1 CA 2735305A1
- Authority
- CA
- Canada
- Prior art keywords
- opgw
- wires
- aluminum
- tube
- conductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
- H01B1/023—Alloys based on aluminium
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
- G02B6/4416—Heterogeneous cables
- G02B6/4422—Heterogeneous cables of the overhead type
- G02B6/4423—Electro-corrosion preventing means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Non-Insulated Conductors (AREA)
Abstract
The invention is based on manufacturing OPGW conductor by using AL-59 including wires, tubes and every metal in the OPGW, That means the OPGW according to our invention consists of a conductor made of aluminum alloy type AL-59 with no other type of metals.
Description
OPGW Based on AL-59 Field of the invention [0001] The invention is related to type of metal to be used in overhead power electrical line ground wires when used as optical fiber cables.
Back ground of the Invention [0002] Conventional Optical Power Ground Wires (OPGWs) [0003] OPGW manufactured by all companies in the past were made of aluminum clad steel wires with the fibers inserted in a tube made of steel and cladded with aluminum. The tubes are usually placed in the first or second layer. But recently such tubes are made of aluminum and many companies place such tubes in the center of the cable to be far from lightening effects which might damage the fibers inside the tube.
Back ground of the Invention [0002] Conventional Optical Power Ground Wires (OPGWs) [0003] OPGW manufactured by all companies in the past were made of aluminum clad steel wires with the fibers inserted in a tube made of steel and cladded with aluminum. The tubes are usually placed in the first or second layer. But recently such tubes are made of aluminum and many companies place such tubes in the center of the cable to be far from lightening effects which might damage the fibers inside the tube.
[0004] Problems with Aluminum and ACSR OPGW:
[0005] The problems with aluminum clad steel wires or aluminum conductor steel reinforced (ACSR) of OPGW are: corrosion and mechanical damage by wind-induced movement.
If the tube is made steel or steel covered with aluminum, then its resistance is high-In case such overhead lines are subjected to lightening, then such high resistance will cause the tube to go to a very high temperature which might damage the fibers. If these tubes are made of aluminum, then high winds which might cause the conductors to vibrate so much that the aluminum tubes might get damaged.
If the tube is made steel or steel covered with aluminum, then its resistance is high-In case such overhead lines are subjected to lightening, then such high resistance will cause the tube to go to a very high temperature which might damage the fibers. If these tubes are made of aluminum, then high winds which might cause the conductors to vibrate so much that the aluminum tubes might get damaged.
[0006] OPGW-Dorking:
[0007] For conventional OPGW based on Dorking conductor withAluminum central tube andaluminum clad steel wires, then we shall get the following specifications:
[0008] Centralised aluminum tube with inner diameter- 4 mm [0009] Outer diameter : 8 mm [00010] With ten round wires made of steel and cladded with aluminum of 3.5 mm.
[00011] Total diameter 15.00 mm and total area of 133.9 mm2.
[00012] Weight: 671 kg/km.
[00013] Rated Tensile strength (RTS): 89.5 KN.
[00014] Final temperature of + 200 "C.
[00015] DC Resistance: 0.329 Ohm.km (at 20'C).
Summary of the Invention:
Summary of the Invention:
[00016] The type of OPGW according to the invention is based not on aluminum norsteel but on AL-59 Alloy according to Swedish Standard SS4240813 Wires and SS4240814 Conductor. AL-59 means that the conductivity of the aluminum alloy is equal to 59% of copper conductivity at 25 C.
[00017] Advantages in General:
[00018] Much less susceptible to corrosion even without greasing which is usually used inACSR.
[00019] Lower resistance and better current rating.
[00020] Easier handling and transportation.
[00021] Higher surface hardness.
[00022] As for tensions and sags, they are limited by the towers and not by conductors-Brief description of the Figure:
(00023] Figure 1is a cross section of aconductor used as an OPGW according to the invention.
Detail description of the Invention [00024] The invention is applicable to all sizes of conductors, but we shall apply it to Dorking as an example.
Detail description of the Invention [00024] The invention is applicable to all sizes of conductors, but we shall apply it to Dorking as an example.
[00025] The conductor shown in Figure lincludes a tube with inner radius of 2.0 mm, outer radius of 4,0 mm and 10 outer conductors each of 1.75 mm radius. The type of metal used in all these wires and tube is AL-59.
[00026] In all OPGWs used as earth wires in overhead electrical high voltage transmission lines, the metal used is to be type AL-59 Alloy according to Swedish Standard 554240813 Wires and 554240814 Conductor. The reference 59 means that the conductivity of this alloy is equal to 59% of the conductivity of copper at 25 C.
[00027] Also the IEC Committee TC7 and working group MT1 issued standard IEC
60104 based on AL-59to be used as a metal for overhead transmission line conductors.
60104 based on AL-59to be used as a metal for overhead transmission line conductors.
[00028] If our invention is used for Dorking type OPGW, then we shall have the following specification:
[00029) Centralised tube which is made of AL-59 with inner diameter : 4 mmand outer diameter: 8 mm.
[00030] With ten round wires each of 3. 5 mm diameter made also made of AL-59.
[00031] Total cross section area: 133.9 mm2.
[00032] Total diameter of the OPGW : approximately: 15 mm, as can be seen in Figure 1.
[00033] Weight: 369 kg/km.
[00034] Rated Tensile Strength(RTS): 80.2 KN .
Claims (3)
1. An OPGW comprising a plurality of wires and a tube, at least one of said wires manufactured solely from AL-59.
2. An OPGW comprising a plurality of wires and a tube, said tube manufactured solely from AL-59.
3. An OPGW comprising a plurality of wires and a tube, at least one of said wires or said tube manufactured solely from AL-59.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2735305 CA2735305A1 (en) | 2011-03-18 | 2011-03-18 | Opgw based on al-59 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2735305 CA2735305A1 (en) | 2011-03-18 | 2011-03-18 | Opgw based on al-59 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2735305A1 true CA2735305A1 (en) | 2012-09-18 |
Family
ID=46853448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2735305 Abandoned CA2735305A1 (en) | 2011-03-18 | 2011-03-18 | Opgw based on al-59 |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2735305A1 (en) |
-
2011
- 2011-03-18 CA CA 2735305 patent/CA2735305A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |
Effective date: 20140915 |