Aerial Bunched Cables

Aerial bundled cables (simply ABC) are overhead power lines using several insulated phase conductors bundled tightly together, usually with a bare neutral conductor. This contrasts with the traditional practice of using un-insulated conductors separated by air gaps. This variation of overhead power lines utilizes the same principles as bundled conductors, except that they are closer together to the point of touching but each conductor is surrounded by an insulating layer (except for the neutral line).

Applications

LV/MV/HV distribution lines.

Advantage

Improved reliability in comparison with both bare conductor overhead systems and underground systems. Insulated conductors prevent accidental contact and supply can be maintained temporarily in the event of a suspension system collapse. Can be installed in a narrower right of way. Ease of erection and stringing, less labor intensive, less construction resources needed. Can stand in close proximity to trees/buildings and will not generate sparks if touched.

Applicable Standards

IS-14255, IS 8130, IEC 60502 etc.

Construction

Conductor
- Phase & Street lighting – The phase conductor shall be of H2/H4 grade Aluminium conductor and compacted circular stranded.
- Neutral or messenger – the Neutral or messenger conductor shall be of Aluminium alloy compacted circular stranded.
Insulation – The Phase, Neutral and street lighting conductor shall be extruded with XLPE as insulation.
Assembly (Laying up) – Three Insulated phase conductor, one insulated neutral conductor (If required), and a street lighting conductor (If required) shall be twisted around the bare or insulated conductor firmly in right hand direction.

Nominal sectional area	16sqmm	25sqmm	35sqmm	50sqmm	70sqmm	95sqmm	120sqmm
No. of Core	2	2	3	3	3	3	3
No. of wire	7	7	7	7	19	19	19
Insulation thickness	1.2	1.2	1.2	1.5	1.5	1.5	1.5
Diameter of insulated core	6.8	8.5	9.5	11	13.0	15.1	16.6
Max DC Resistance 20deg C	1.91	1.2	0.868	0.641	0.443	0.320	0.253
Tensile strength (Mpa)	90	90	90	90	90	90	90
Messenger Conductor (Bare)
Nominal sectional area	25sqmm	35sqmm	25sqmm	35sqmm	50sqmm	70sqmm	70sqmm
No. of Core	1	1	1	1	1	1	1
No. of wire	7	7	7	7	7	7	7
Max DC Resistance 20deg C	1.38	0.986	1.38	0.986	0.689	0.492	0.492
Breaking load (kN)	7	9.8	7	9.8	14.0	19.7	19.7
Street Light conductor
In Street lighting conductor (if required) 16sqmm conductor used. Consider all parameter as per 16sqmm phase conductor

Typical Size of AB Cable

Designation	Cable length (Mtr)
2C×16+25 mm2	2000
3C×16+25 mm2	1000
3C×351525 mm2	1000
3C×35+25 mm2+16mm2	1000
3C×50+35mm2	1000
3C×50+35mm2+16mm2	1000
3C×70+50mm2+16mm2	1000
3C×95+70mm2+16mm2	1000
3C×120+70mm2+16mm2	500
3C×150+95mm2+16mm2	500

Remarks: Information given above is only for ref purpose. Lumino Can manufacture different size of AB cable other than mentioned above with higher/lower standard length as per customer requirements.