LT Aerial Bunched Cables are a modern solution for power distribution in low-voltage applications. They combine multiple insulated conductors into a compact and safe unit, which is installed overhead. They are widely used for power supply in urban, rural, and industrial areas.
These cables are designed to provide a reliable, cost-effective, and safe power distribution system, especially in areas where underground cables are not feasible. They are an ideal alternative to conventional bare conductors in aerial applications.
Standard Compliance:
These cables conform to IS 14255 for safety, quality, and environmental compliance.
Voltage Rating:
Typically upto 1.1 KV (Low Tension)
Conductor Material for Phase / Neutral conductor:
The phase conductor is of H2/H4 grade aluminium complying with the requirements of IS 8130 with latest amendments and conforms to flexibility class 2 of IS 8130. The phase conductor can be single phase or Three phase depending on the single phase /Three phase system.
Insulation Material:
The conductors are insulated with a variety of materials like XLPE (Cross-Linked Polyethylene) for superior insulation by extrusion process. It is so applied that it fits closely on the conductor and is possible to remove without damaging the conductor. The colour of insulation is black for aerial bunched cable with UV resistant properties.
Nominal Size Range for Phase conductor:
16mm², 25mm², 35mm², 50mm², 70mm², 95mm² etc.
Messenger conductor:
The messenger conductor will be of aluminium alloy as per IS 398 Part 4 can be Bare as well as Insulated (As per customer requirements). The mentioned electrical parameter is for bare messenger conductor.
Street Light conductor:
The street light conductor if required will be 16 sq.mm aluminum conductor as per IS 8130 and will be XLPE insulated.
Assembly (Laying Up):
The required number of insulated phase conductors, one insulated neutral conductor (if required) and a street lighting conductor (if required) is twisted around the bare (or insulated) as required messenger conductor without fillers with a lay not exceeding 35 times the diameter of the insulated phase conductor. The direction of lay is right hand.
Temperature Range:
Suitable for operating in temperatures between -20°C and 90°C.
Core Identifications:
The phase conductors are provided with one, two or three ‘ridges’ and outer neutral insulated conductor, if provided, has four ‘ridges’ for quick identification. The street lighting conductor and messenger conductor (if insulated) does not have any identification mark.
Compact & Space-Efficient
Aerial bunched cables take up less space compared to traditional overhead lines, making them ideal for congested areas.
Safety Features:
The insulated conductors significantly reduce the risk of electrical accidents like short circuits and fires, making them safer than conventional open wire systems.
Resistance to Environmental Factors:
These cables can withstand varying weather conditions, making them highly reliable in areas with harsh climates.
Reduced Power Loss:
Their construction minimizes power losses due to resistance, resulting in more efficient power distribution.
Minimal Maintenance:
Due to the nature of their insulation and design, LT aerial bunched cables require less frequent maintenance and repairs compared to other types of power cables.
Simple and Quick Installation:
These cables are easier and quicker to install compared to traditional cables because they don’t require digging or underground trenching.
Installation Tips:
Ensure the correct tension is maintained during installation to prevent damage. Use appropriate cable supports and fixtures to maintain the integrity of the cable.
| Cable Size* (P + M + S) (Sq.mm) |
Nominal Thickness of XLPE insulation (mm) | Minimum Breaking load of messenger (KN) | Max DC resistance at 20°C (Ohm/Km) |
Current Rating in air at 40 deg C (Amps) |
||
| Phase conductor | Street Light | Phase conductor | Messenger Conductor | |||
| 1C x 16 + 25 + 16 | 1.2 | 1.2 | 7 | 1.91 | 1.38 | 84 |
| 1C x 16 + 25 | 1.2 | – | 7 | 1.91 | 1.38 | 84 |
| 3C x 16 + 25 + 16 | 1.2 | 1.2 | 7 | 1.91 | 1.38 | 72 |
| 3C x 16 + 25 | 1.2 | – | 7 | 1.91 | 1.38 | 72 |
| 1C x 25 + 25 + 16 | 1.2 | 1.2 | 7 | 1.2 | 1.38 | 112 |
| 1C x 25 + 25 | 1.2 | – | 7 | 1.2 | 1.38 | 112 |
| 3C x 25 + 25 + 16 | 1.2 | 1.2 | 7 | 1.2 | 1.38 | 98 |
| 3C x 25 + 25 | 1.2 | – | 7 | 1.2 | 1.38 | 98 |
| 1C x 35 + 25 + 16 | 1.2 | 1.2 | 7 | 0.868 | 1.38 | 137 |
| 1C x 35 + 25 | 1.2 | – | 7 | 0.868 | 1.38 | 137 |
| 3C x 35 + 25 + 16 | 1.2 | 1.2 | 7 | 0.868 | 1.38 | 119 |
| 3C x 35 + 25 | 1.2 | – | 7 | 0.868 | 1.38 | 119 |
| 1C x 50 + 35 + 16 | 1.5 | 1.2 | 9.8 | 0.641 | 0.986 | 165 |
| 1C x 50 + 35 | 1.5 | – | 9.8 | 0.641 | 0.986 | 165 |
| 3C x 50 + 35 + 16 | 1.5 | 1.2 | 9.8 | 0.641 | 0.986 | 145 |
| 3C x 50 + 35 | 1.5 | – | 9.8 | 0.641 | 0.986 | 145 |
| 1C x 70 + 50 + 16 | 1.5 | 1.2 | 14 | 0.443 | 0.689 | 209 |
| 1C x 70 + 50 | 1.5 | – | 14 | 0.443 | 0.689 | 209 |
| 3C x 70 + 50 + 16 | 1.5 | 1.2 | 14 | 0.443 | 0.689 | 185 |
| 3C x 70 + 50 | 1.5 | – | 14 | 0.443 | 0.689 | 185 |
| 1C x 95 + 70 + 16 | 1.5 | 1.2 | 19.7 | 0.32 | 0.492 | 264 |
| 1C x 95 + 70 | 1.5 | – | 19.7 | 0.32 | 0.492 | 264 |
| 3C x 95 + 70 + 16 | 1.5 | 1.2 | 19.7 | 0.32 | 0.492 | 235 |
| 3C x 95 + 70 | 1.5 | – | 19.7 | 0.32 | 0.492 | 235 |
* The above sizes are indicative only. Higher sizes or other customized sizes can be supplied as per customer requirements.
Inspection and Monitoring:
Regular inspection and monitoring for any visible wear or damage can help in prolonging the life of the cables.
Repairing:
In case of any damage, repairs can be done quickly and efficiently by replacing only the damaged section.
Fort Gloster Industries Limited policy of continuous improvement may result in a change in specifications without prior notice. Any warranty of any nature relating to any Fort Gloster product is only contained in the written agreement between Fort Gloster Industries Limited and the direct purchaser of such product(s).