LT Aerial Bunched Cables
LT Aerial Bunched Cables of 1.1 kV voltage grade are used for distributing power to individual consumers by utility service providers such as electricity boards and electricity distributing authorities. The cables are suspended overhead using electrical poles. The cables can be tapped intermittently from any required position, enabling them to be used in urban as well as rural areas.
- Single phase or three phase systems with or without street light line.
- Phase or lighting conductor: Electrolytic aluminium of H2 or H4 grade as per IS:8130 messenger conductor is comprised of aluminium silica and magnesium alloy as per IS:398 (Part 4).
- XLPE- cross-linked polyethylene or PE- polyethylene compound insulated.
- Ridges provided on the insulation of phase conductors: 1 ridge for the 1st phase, 2 ridges for the 2nd phase and 3 ridges for the 3rd phase. The Neutral phase may have 4 ridges, if required.
- As the cable remains exposed to environmental elements such as UV rays from sunlight, the insulation is mixed with a small amount of carbon black to prevent the deterioration of polyethylene hence the cores are black.
Additional advantages of this construction
AB cables are lighter in weight than armoured/unarmoured cables of same size & similar current ratings. It is easy to install, and can be installed on poles, walls etc. Also very easy to make terminations and branch off joints on live wire as well. The insulation is PE - polyethylene or XLPE - cross linked polyethylene.
