SF Engineering Services

SF Engineering Services is proud to introduce as pioneer in designing, supervision, installation and commissioning of state of the art power distribution system in low voltage & medium/high voltage, first ever in Pakistan. We provide the complete solution on the basis of Survey, designing, quantification, procurement, supervision, installation and commissioning of Aerial Bundled Cables PE / XLPE insulated Aluminum and Copper conductors for LV/ MV/ HT.

Introduction of ABC System and Technology

The PE/XLPE insulated cables supported itself and safe ( water proof ) with economical & less maintenance cost is replacing the obsolete bare copper and Aluminum Conductors distribution overhead lines in Urban and Rural areas day by day in the developed and underdeveloped countries globally.

Commonly, three types of Aerial Bundled Cables are in vogue such as:

System-1

Insulated Neutral Messenger is made with high tensile strength capability to carry over the entire cable weight / load. The metallurgical composition used is of Aluminum Alloy material.
The insulation all conductors is XLPE (cross linked Polyethylene).
The Cables / insulated conductors twisted together with street light cable of 16mm2 or 25mm2 sizes.
Many a countries in the Europe and Fareast adapted this system including Pakistan and working satisfactory with.

System-2

Contrary to French, in German System, all the four cores bear equally the overhead cable’s load tensility. The insulation material mostly used XLPE and in some cases PE.
This System besides Germany also adopted and used by some other European Countries.

System-3

The messenger is non-insulated and combines with XLPE / PE insulated Aluminum phase conductors and street light single or double conductors.
This system also adopted and used by Middle East, South America, North European countries and Australasia.

Aerial Bundled Cable Installations

ABC in worst condition

Different views of LV ABC installation in worst conditions.

ABC in worst condition

Different views of LV ABC installation in worst conditions.

HT ABC 3-cores

HT ABC (three phase) 3-cores supported by a bare ‘messenger’ or ‘catenary’ to prevent straining the PVC & XLPE insulation.

HT ABC cable

HT ABC Installation - Cable bundles.

HT ABC installation work

HT ABC Installation - Work in progress.

HT ABC view

HT ABC Installation - View after installation.

LT ABC view

LT ABC Installation - View after installation.

LT ABC installation

LT ABC Installation - View after installation.

LV ABC in existing infrastructure

Incorporating the LV ABC in the existing infrastructures.

LV ABC in existing infrastructure

Incorporating the LV ABC in the existing infrastructures.

LV ABC in existing infrastructure

Incorporating the LV ABC in the existing infrastructures.

LV ABC in existing infrastructure

Incorporating the LV ABC in the existing infrastructures.

The PE / XLPE Insulated Aluminum Aerial Bundled cable not only proved good to extent to reduce the bare copper and Aluminum / and electric power theft and pilferage problem, but also reduced to negligible the electrocution accidents, especially in rural and urban areas of under developed countries like sub-continent, Africa and some far eastern countries.

Due to its nature of construction the LT – ABC could be installed easily & quickly by using the old poles, trees or other wall structures with customized fittings and accessories in a shortest possible time with safe application and end use.

Even it falls on the ground the chances of any sort of damage and electrocution is very negligible. During rainfalls and extreme weather conditions the supply of electricity can be safely ensured with reliability without any chances of short circuiting.

Having more aesthetically proved in comparison to bare copper and aluminum conductors which occupies more spaces horizontally and vertically.

The cost of maintenance proved very low which ultimately reduces the distribution company’s expenditures remarkably which is to be incurred in the shape of human resources and maintenance material application.

The water proof and insulated piercing conductor (line trap for ABC) can be installed in the live position and have state of the art torque lock position system.

The cost of ABC Accessories is lesser than the cost of line hardware of bare conductor’s installation. Therefore, the overall cost including Cable’s installation reduces to 18%. The augmentation of circuits can be achieved by installing parallel circuits on same poles; some of the distribution companies have even shared with communication companies and use their poles for LV- ABC, installation. The effect of impedance is lower in ABC which also resulted in carrying higher rating of current.

In Karachi, the humidity rate is always high due to Coastal winds which directly affect the exposed conductors , where as in insulated ABC , the cable have increased life of 25% than bare conductors’ maximum life.