Product Details

Product Range
Cable Type Specifications

1) L.T. Cables upto 1.1KV Power

    IS:14255-1995

-Multi core upto 95 sq.mm

-Aluminium Alloy Conductor
About the Cable

Aerial Bunched Cables (ABC) is a very novel concept for Over Head Power distribution. When compared to the conventional bare conductor over head distribution system. ABC provides higher safety and reliability, lower power losses and ultimate system economy by reducing installation, maintenance and operative cost. This system is ideal for rural distribution and specially attractive for installation in difficult terrains such as hilly areas, forest areas, coastal areas etc.

Aerial Bunched Cables is also considered to be the best choice for power distribution congested urban areas with narrow lanes and by – lanes. In developing urban complex, Aerial Bunched Cables is the better choice because of flexibility for rerouting as demanded by changes in urban development plan.

In comparison to bare overhead power distribution lines, ABC has very high reliability in maintaining services because power and neutral conductors are insulated with the best dielectric medium, resulting in the following advantages:

  • Less fault rate on account of good protection against line and ground fault by high winds or falling trees or birds especially in hilly areas & forests as encountered in rural distribution networks.  
  • High insulation resistance to earth in all seasons and polluted atmospheres.
  • Negligible leakage currents and low losses.  
  • Multiple circuits of Power and Telephone cables could be strung in the same set of poles or any other supports like walls etc.
  • Better adaptability to run concurrently with existing overhead bare conductor system without any interference.  
  • High capacitance and low inductance leading to low impedance of lines.  
  • Lower voltage drop, higher current capacities. VIS-À-VIS Better Voltage Regulation.  
  • Longer spans and longer distance lines are possible with better system stability.  
  • ABC cables are much safer than bare Conductors.  
  • It can be over hung in dense vegetation and forests.  
  • Additional connections can be easily and quickly made with hot – line connectors.  
  • Total lines costs are reduced.  
  • Maintenance is very easy.
Application

Aerial Bunched Cables can be conveniently used:

  • As replacement of bare lines in Rural Areas, in woods and in other localities & narrows streets where the space limited.  
  • As replacement of bare lines where reliability of supply is of prime importance.  
  • As replacement of bare lines where high degree of stability of supply voltage is of importance.  
  • In hilly terrains where cost of erection of overhead lines or under ground cable becomes very high.  
  • As reinforcement of existing system without increasing voltage.
  • For temporary supplies.
General Construction
Configuration : Multi-core/Multi-pair
Conductor

Phase or lighting conductor: Hard drawn Aluminium H2 or H4 grade as per IS:8130. Messenger conductor : Aluminium Silica and Magnesium Alloy used after treatment as per IS: 398 (part 4).

Insulation

XLPE, HDPE or PVC applied by extrusion process as per the requirements.

Identification of Phase

By providing ridges on the insulation of phase conductors. One ridge for 1st phase,2 and 3 ridges for 2 nd and 3rd phases respectively. Neutral can have 4 ridges, if desired.

Color of Insulation

Because the cable remains exposed to environment & sunlight (ultraviolet radiation) the insulation is mixed with a small amount of carbon black to stop deterioration of polythene due to U V radiation.

Assembling

The phase conductor along with the lighting conductor ( where applicable) is twisted around messenger conductor.

Construction

The phase conductor can be of single phase and also of three phases. A lighting conductor can be also incorporated to give supply to the street lighting. Messenger conductor supports the weight of the cable and keeps the assembly strung under tension. The phase conductor is made of concentrically stranded Aluminium Wires having 7 or 19 wires. The messenger conductor is made of specially treated Silica, Magnesium Aluminium alloy having 7 wires. The phase conductor and lighting conductor where applicable are insulated with XLPE/HDPE/PVC compound. The messenger conductor, as per customer's choice is kept either bare or insulated. The phase conductor along with lighting conductor (where applicable) are twisted around the messenger conductor (insulated or bare) and left as such. Sometimes as a special case a neutral conductor is also provided separately, if desired, by the user. Generally, messenger acts as earth as well as neutral.

Technical Specifications

Aerial Bunched Cable For Working Voltages Up To and Including 1100 Volts As Per IS:14255-1995

S.No. Phase Conductor Thickness Of Insulation Messenger Conductor
Nominal Cross Sectional Area Maximum DC Resistance At 20ºC Nominal Thickness Nominal Cross Sectional Area Maximum DC Resistance At 20ºC Minimum Breaking Load
Sq.mm Ohm/Km mm Sq.mm Ohm/Km KN
1 16 1.91 1.2 25 1.38 7.0
2 25 1.20 1.2 25 1.38 7.0
3 35 0.868 1.2 25 1.38 7.0
4 50 0.641 1.5 35 0.986 9.8
5 70 0.443 1.5 50 0.689 14.0
6 95 0.320 1.5 70 0.492 19.7

Aerial Bunched Cable For Working Voltages Up To and Including 1100 Volts As Per IS:14255-1995 Continued

3 Core LT Aerial Bunched Cable 1100 Volts
S.No. Designation Size Bunched Cable Overall Diameter Approx. Total Mass Approx.
Sq.mm. mm. Kg/Km
1 3C x 16 +25 19 250
2 3C x 16+16+25 19 310
3 3C x 25 +25 22 330
4 3C x 25+16 +25 22 390
5 3C x 35 +25 24 430
6 3C x 35+16+25 24 490
7 3C x 50 +35 28 580
8 3C x 50+16+35 28 640
9 3C x 70 +50 32 830
10 3C x 70 +16+50 32 890
11 3C x 95 +70 37 1120
12 3C x 95+16+70 37 1180