
Cable Type | Specifications |
1) L.T. Cables upto 1.1KV Power IS:14255-1995 |
-Multi core upto 95 sq.mm -Aluminium Alloy Conductor |
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:
Aerial Bunched Cables can be conveniently used:
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).
XLPE, HDPE or PVC applied by extrusion process as per the requirements.
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.
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.
The phase conductor along with the lighting conductor ( where applicable) is twisted around messenger conductor.
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.
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 |
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 |