Aerial Bunch Cables

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Aerial Bunched CablesContentsIntroduction - Oman Cables Industry (SAOG)........................................................................................... 3 Aerial Bunch Cables................................................................................................................................. 4 Constructional Drawing ............................................................................................................................ 8 MV Aerial Bunch Cable......................................................................................................................... 8 Overhead Conductor - Aerial Bunch Cable ........................................................................................... 8

Last Revision Date: November 2003

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Aerial Bunched CablesIntroduction - Oman Cables Industry (SAOG)Oman Cables Industry (SAOG) was established in 1984 and started commercial production of building Wires in 1987. Setting a 10 year target period to manufacture L.V. Power Cables, Control Cables, Low Smoke Flame Retarding (LSF/FRLS) Cables, Over Head Line Conductors and Flexible Cables for both domestic and export markets, OCI was able to fulfill the mission in merely 8 years. Today, OCI is the largest cable manufacturer in Sultanate of Oman. Beside local sales, OCI exports to all the GCC countries, the Middle East, the Far East, Vietnam, Yemen, U.K., Pakistan, etc. The companys reputation, manufacturing capabilities, quality and reliability bagged it large orders from world renowned EPC contractors like Snamprogetti Italy, Snamprogetti France, Chiyoda-Foster Japan/U.K. OCI, in a short span of time, has successfully made its mark in 4 continents of the world against tough international competition. OCI products are also approved and registered with Department of Electrical Services, Ministry of Development, Negara, Brunei Darussalam. Located in Rusayl, the Sultanates largest industrial complex, the company is equipped with ultra-modern Plant & Machinery. OCI gives you a choice in wires, cables and conductors as per British standards, IEC specification, MEW-UAE, WED-Abudhabi, DEWA-Dubai, MEW Bahrain, Ministry of Defence and to other national and international standards. In 1994 the company was accredited with the ISO 9002 certification in remarkably short period of 6 months in line with OCIs proven capability to meet its challenges. Added to it, OCI is now accredited with the ISO 9001- design capabilities certification, which further bears testimony to OCIs consistency in Quality Management. The company is also a proud recipient of His Majestys trophy for the Best Industry Award in the year 1991, 1992, 1996 and 1997 a unique award for its achievements. Certificate of Honour for excellence in the year 1993, 1994, 1995, 1998, 1999 to 2000 were further awarded to OCIs success. The company continues to enjoy the position of the top ten best performing companies in the Sultanate since and has shown a steep rise in growth. This demonstrates the confidence the customer has reposed in OCI. The company draws strength from its highly experienced staff, design & project management resources and stringent Quality Assurance procedures to deliver total commitment to quality, reliability, safety and customer satisfaction. OCIs performance has attracted world renowned DRAKA HOLDINGS NV The Netherlands, one of the largest Special Cables manufacturing group in the world to participate in its equity. With technical know-how and support of Draka Holdings, OCI is capable of displaying better growth and fostering customer satisfaction. As an affiliate of Draka Holding Organisation with operations in Europe, United States and the Far East, OCI is ideally positioned to service customers on both the national and global front. OCI offers combine unrivalled experience and a vast product range developed with the support, strength and resources of one of the worlds most significant cable companies. In the year 1999, OCI has successfully launched and started delivering solutions to the Instrumentation cables. Keeping in line with this success, the company has ventured into other hi-tech products, viz., special cables, Oil & Gas cables, etc., to its existing line of products. OCI is humbly proud of its efforts and success and believes success is not a destination but a journey. It will strive further to achieve even higher pinnacles of success and continue to offer better service and satisfaction to its distributors and end users. In this brochure we give details of Aerial Bunch Cables. OCI prides on its ability to offer products to each customer specific needs quickly, efficiently and with an assurance of product quality.

Last Revision Date: November 2003

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Aerial Bunched CablesAerial Bunch CablesAerial Bunch Cables are basically a compromise construction between Power cables and Overhead conductors. Though the concept is not very new, but of late its use is increasing all over the world. The basic construction is as follows:3 power cores consisting of standard aluminium conductors, insulated with XLPE insulation + One sheath lighting aluminium conductor with XLPE insulation (optional) + One messenger Al-alloy conductor (bare or covered) The messenger conductor can be of galvanised steel wire also. The purpose of messenger wire is a) It acts as load bearing wire. b) It acts as earth or neutral conductor.Typical Aerial Bunch Cables

Advantages of Aerial Bunch Cables are as follows:a) These are cheaper than power cables. b) Cores being insulated, the chances of power thefts are eliminated. c) Cores being insulated, the chances of faults due to falling of trees or birds are eliminated. d) These can be laid in places where, due to lack of space, power cables cannot be laid. e) Insulation also helps to prevent corrosion of conductor. f) Cables are also safe for crossing of telecommunication lines.

As these are laid on poles aluminium conductor with maximum size of 95 sq mm are normally used. Due to above mentioned advantages these types of cables are gradually getting widespread acceptance, specifically in developing countries. A typical construction is as given below :3 x 95 sq mm Power Cores Aluminium conductor, XLPE insulated + 1 x 16 sq mm lighting core Aluminium conductor, XLPE insulated + 1 x 95 sq m messenger conductor of aluminium magnesium silicon alloy. 5 cores laid together

Last Revision Date: November 2003

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Aerial Bunched CablesTechnical particulars of the construction are as given below :3C x 95 + 95 +16 1. 2. 3. Nominal voltage : 0.6/1.0 KV Standard applicable : IEC 60502 part 1 in general

Power core i) Conductor a) Material : b) Area-nominal : c) Diameter : d) Standard : ii) Insulation a) Material b) Thickness-nominal c) Diameter over-insulation iii) Core identification Lighting core i. Conductor a) Material b) Area-nominal c) Diameter d) Standard ii. Insulation a) Material b) Thickness-nominal c) Core Diameter Messenger conductor a) Material b) Area c) Diameter d) Standard Overall diameter of bundle

Aluminium 95 mm 11.4 mm IEC 228/ BS 6360 : : : :

15 RBD Wire Drawing Machine

XLPE 1.6 mm 14.8 mm approx. By ridges or by printing core numbers on black cores.

4.

: : : :

Aluminium 16 mm 5.1 mm IEC 228/ BS 6360

: Cross linked polyethylene : 0.7 mm : 6.5 mm approx.61 Bobbin Strander

5.

: : : : :

AAAC 95 mm 12.5 mm DIN 48201 part 6 42.1 mm approx.

6. 7.

Electrical parameters i) Max. D.C. Resistance at 20C a) Phase conductor : b) Lighting conductor : c) Messenger conductor :

0.320 ohm/km 1.91 ohm/km 0.358 ohm/kmPage 5 of 8

Last Revision Date: November 2003

Aerial Bunched Cables8. Standard packing length : 500 mtrs

Some countries have started using MV aerial bunch cables as well. One such typical construction is as given below:3 x 95 sq mm Al conductor, Semicon screen, XLPE insulation, semicon screen, copper taped, PVC sheathed and 1 x 25 sq mm steel wire, PVC sheath, four cores laid up together 22 KV (E) grade. Technical particulars of the above constructions are as below:3C x 95 + 1 x 25 1. Nominal voltage : 12/20 (24 KV) IEC 60502 part 2 in general

2. Standard applicable :

3. Power core i. Conductor a) Material : Aluminium b) Area-nominal : 95 mm c) Diameter : 11.4 mm d) Standard : IEC 228/ BS 6360120mm/45mm Extruder

ii.

Conductor screen a) Material : Insulation a) Material b) Thickness -nominal Insulation screen 1) Non metallic a) Material 2) Metallic a) Material

Semi conducting XLPE

iii.

: :

HT grade cross linked polyethylene 5.5 mm

iv.

:

Semi conducting XLPE

:

Copper tape

v)

Sheath a) Material : b) Nominal thickness : c) Overall diameter of core:

PVC type ST 2 1.4 mm 30.0 mm approx.Page 6 of 8

Last Revision Date: November 2003

Aerial Bunched Cables4. Messenger core i) Conductor a) Material b) Area c) Diameter ii) Insulating sheath a) Material b) Thickness c) Core Diameter

: : :

Galvanised steel 25 mm 6.4 mm

: : :

PVC 1.2 mm 8.8 mm approx.

5. Overall diameter of bundle

: 63.21 mm approx.

6. Electrical parameters i) Max. D.C. Resistance at 20C a) Phase conductor : b) Current carrying capacity : 7. Standard packing length :

0.320 ohm/km 360 Amps 500 mtrs

5-Core Drum Twister

Brief technical details of some Aerial Bunched cable sizes - as per NFC 33-209S.No Description Cable weight kg/km 780 990 1140 1378 Cable dia mm 33 36 37.5 44 Current rating Phase in air Lighting in air at 30C (A) at 30C (A) 138 83 168 83 213 83 258 83

1 2 3 4

3Cx35+1Cx16+54.6 3Cx50+1Cx16+54.6 3Cx70+1Cx16+54.6 3Cx95+1Cx16+54.6

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