Aluminium Conductor

This conductor is also known as aluminium stranded conductor. This conductor is manufactured from electrolytically refined (E.C.GRADE) aluminium, having purity of minimum 99.5% of aluminium.

This conductor is used mainly in urban areas and the spacing is short and the supports are close. All aluminium conductors are made up of one or more strands of aluminium wire depending on the end usage. These conductors are also used extensively in costal because

It has a very high degree of corrosion resistance.

Aluminium Conductors, Steel Reinforced (ACSR) :

This conductor consists of a solid or stranded steel core surrounded by strands of aluminium (E.C. GRADE). ACSR CONDUCTOR is available in a wide range of steel varying from as low as 6% to as high as 40 %.

ACSR conductor may be manufactured for having a wide range of tensile strength as per requirement. The principal advantage of these conductors are high tensile strength and light weight with longer spans as well as with lesser supports. Due to the greater diameter of ACSR CONDUCTORS a much higher corona limit can be obtained causing big advantages on high as well as extra high voltage overhead lines.

Aerial Bunched Cables

Most of the faults in overhead power supply systems occur due to failure in transmission lines, resulting in immense loss and inconvenience to consumers. The main weakness of overhead lines are that its power carrying conductors are bare.To overcome the above deficiency, Aerial Bunched Cables systems have been introduced at many places across the world for both HT and LT systems.

Principally, the system is a compromise between insulated power cable systems and bare overhead conductor systems. As far as basic construction goes, there are three or four power carrying conductors suitably insulated and laid around a bare or insulated weight-carrying conductor, which also serves as earth/neutral conductor. The cable is then hanged on transmission poles/towers suitably. Since the cores are insulated the chances of faults reduces to a great extent.

Power and Neutral Cores : Here, the conductor is composed of H2 or H4 grade Aluminium of Class 2 grade to IS: 8130/84. Popular sizes are 16mm2 to 95mm2. Again, insulation can be either crosslinked Polyethylene or Polyethylene.

Messenger Conductor : These are made of either galvanized Steel or Aluminium alloys.

Core Identification : Either by number printing or by ridges on insulated cores.

Specification : REC specification no.32/1984 an IS: 14255/1995 deals exclusively with LT aerial bunched cables. Additionally, customers have developed their own specification according to their specific needs.

Strong Points : In comparision to bare overhead lines, aerial bunched cable has very high degree of safety and reliability due to the conductors being insulated with the best dielectric medium. This ensures good protection against ground and line faults leading to considerable increase in system efficiency as against bare overhead lines. The problem of free-clearance is also minimized.

Tampering with power-line like hooking also gets eliminated resulting in much more efficient utilization of power.Aerial bunched cable system is specially suited in limited space conditions like densely populated areas where laying of underground cables is impossible or extremely expensive.In India with economic reforms and gradual opening of economy to the global system, the Power sector has become one of the key areas of attention of everybody concerned.

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