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overhead cable/overhead installation cable

Information Source:Henan Huadong Cable Co., Ltd  Release date:2014-01-08

overhead Cable application:

 The product is used in the field of overhead power line, in power transmission lines with various voltage levels,because they have such good characteristics as simple structure,convenient installation and maintenance,low cost large transmission capacity.And they are also suitable for laying across rivers valleys and the places where special geographical features exist.

Overhead cable details:
 
  An overhead cable is an electric powertransmission line suspended by towers or utility poles. Since most of the insulationis provided by air, overhead power lines are generally the lowest-cost methodof transmission for large quantities of electric energy. 
   1. overhead cable  classification by operating voltage  Overhead power transmission lines are classified in the electrical power industry by the range of voltages:
   2. Low voltage – less than 1000 volts, usedfor connection between a residential or small commercial customer and  theutility.
   3. Medium Voltage (Distribution) – between1000 volts (1 kV) and to about 33 kV, used for distribution in urban and  ruralareas (overhead AAAC Conductor).

Overhead cable Specification size and main property :

Aluminium conductor steelre- infored(ACSR),rare-earth Aluminum alloy standed conductors( GB/T 1179-2008 )JL.JL/G Model.

(Exmple)

Nominal cross section(mm2)

Structure

(No./diameter)

(mm)

Outer diameter

Mm

D.C resistant at 20°C≤(/Km)

Calculated breaking load≥N

Calculated weight

(kg/km)

Delivery

Length≥m

Continuous cross-sectional flow (A)

16

7/1.70

5.1

1.8020

2840

43.5

4000

111

25

7/2.15

6.45

1.1270

4355

69.6

3000

147

35

7/2.50

7.50

0.8332

5760

94.1

2000

180

50

7/3.00

9.00

0.5786

7930

135.5

1500

227

   Overhead cable A major goal of overhead power line design isto maintain adequate clearance between energized conductors and the ground soas to prevent dangerous contact with the line. [1] Today overhead lines areroutinely operated at voltages  exceeding 765,000 volts between conductors, witheven higher voltages possible in some cases (ABC Cable).
  Towers for support ofthe lines are made of wood (as-grown or laminated), steel (either latticestructures or tubular poles), concrete, aluminum, and occasionally reinforced plastics.
 
  Overhead cable The bare wire conductors on the line are generally made of aluminum (eitherplain or reinforced with steel, or sometimes composite materials), though somecopper wires are used in medium-voltage distribution and low-voltageconnections to customer premises. 
HUADONG Henan Huadong is a hi-tech, engineering group. We are specialized in the research,development,and production of ABC Cable,Rubber Cable, mv medium voltage power cable,Control/Instrumentation Cable,Mining Cable, Bare Conductor(AAC/AAAC/ACSR/ACS), Huadong Cable Supply the price of 16mm armoured cableat competitive.
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