Current carrying capacity of copper conductors current carrying capacity is defined as the amperage a conductor can carry before melting either the conductor or the insulation. Aluminium conductor steelreinforced cable acsr is a type of highcapacity, highstrength stranded conductor typically used in overhead power lines. Applications used as bare overhead transmission cable and as primary and secondary distribution cable. Acsr aluminum conductors steel reinforced spanishsizes. Guidelines for the selection and operation of bare acsr conductors. Subcommittee provide an update to the bare overhead transmission conductor ratings guide. Generally acsr consists of galvanized steel core 1 wire or 7 wires 0r 19 wires surrounded by concentric layer of aluminum wires. Acsr, ampacity, right of way, overhead transmission, maximum power. Used as bare overhead transmission cable and as primary and secondary distribution cable. Aluminiumconductor steelreinforced cable wikipedia. Ac 60hz resistance includes current dependent hysteresis loss factor for 1 and 3 layer constructions.
The acsr are delivered on nonreturnable wooden drums as per customer requirements. Current carrying capacity acsr conductors electrical connector. The proportion of steel and aluminum in an acsr conductor can be selected based on the mechanical strength and. Please find the attached picture of the table which shows the current carrying capacity of aluminium and copper wires. The higher strength acsr conductors are used for river crossings, overhead earth wires, and installations involving extra long spans.
Current carrying capacity of wires and cables, westinghouse electric journal, apr. Only type tested acsr conductor are to be offered conforming to our technical specification, and relevant is and iec. Bare overhead conductors acsr aluminium conductor steel reinforced application. Current carrying capacity of overhead of the transmission line conductors and conductors. Guidelines for the selection and operation of bare acsr.
Variable steel core stranding enables desired strength to be achieved without sacrificing ampacity. Maximum dc code overall rated resistance name steel total aluminium steel diameter aluminium steel total strength at 20 oc awg or awg or mcm mcm turkey 6. All values assume an ambient temperature of 300c and a conductor operating temperature of 700c. A given conductor has several ampacities, depending on its application and the assumptions used. What is the current carrying capacity of acsr conductors. The proportion of steel and aluminum in an acsr conductor can be selected based on the mechanical strength and current carrying capacity demanded by each application. This current carrying capacity is normally given in amperes.
All lengths outside this limit of tolerance shall be treated as random lengths. By using our websites, you agree to the placement of these cookies. Acsr conductors are either not required or suitable. Current carrying capacity acsr conductors free download as word doc. There can be various stranding combinations of al and steel wires lending. Aluminium conductors steel reinforced type acsrgz acsr conductors are a composite, concentrically stranded conductor consisting of a single galvanised steel wire or a stranded galvanized steel central core surrounded with one or more layers of ec grade alloy 50 stranded aluminium wires. Ampacities the ampacity is the maximum designed current of a conductor. Aluminum conductor steel reinforced bare applications used as bare overhead transmission conductor and as primary and secondary distribution conductor and messenger support. Acsr conductor offered should be similar with ones on which type testing has been carried out as per relevant is and iec. Current carrying capacity standard length al as al as per reel. Acsr conductors acsr dog conductor wholesaler from pune. Current carrying capacity amps of cables copper conductors single core 700c thermoplastic insulated cables e.
These choices provide the necessary strength and the current carrying capacity for given applications. What is the difference between contamination cross contamination and spoilage. Values in brackets are dc resistance and current carrying capacity of low loss conductor with tal thermal resistant aluminum alloy. The center strand is steel for additional strength to help support the weight of the conductor. Aluminium cable aaac astm b all aluminium alloy conductor astm sizes metric units code size kcm nominal size mm2 stranding diameter inches weight 11 lbsft rated strength 2 kg resistance 3 ohmsft current rating4 amps size mm2 acsr with equiv.
Acsr conductor is available in a range of steel strengths varying from 6% up to 40%. It provides excellent mechanical strength without compromising the ampacity. Aluminium conductor aac conductors al 59 aaac acsr. Introduction ampacity is defined as the maximum amount of electrical current a conductor or device can carry before sustaining immediate or progressive deterioration. The outer strands are highpurity aluminium, chosen for its good conductivity, low weight and low cost. Acsr aluminium conductor steel reinforced aaac allaluminium alloy conductor o stronger than acsr, more resistant against corrosion, more resistant surface.
Current carrying capacity of acsr panther, moose, zebra. Equations for calculating the currentcarrying capacity ampacity, loss of strength, and timetemperature characteristics of acsr conductors are illustrated and parameters used in these equations are explained. Also described as current rating or currentcarrying capacity, ampacity is. Construction aaac is a homogenous concentriclaystranded conductor made from round aluminum 6201t81 wires.
As current increases, the heat generated within the conductor increases exponentially. Construction ratio of aluminum and steel varies with requirement of current carrying capacity. National electrical code allowable ampacities of insulated. The proportion of steel and aluminium in an acsr conductor can be selected based on the mechanical strength and current carrying capacity demanded by each application. Aluminium conductors steel reinforced acsr kelani cables plc. Technical specification for acsr panther conductor 1. The impact of an incomplete overlap of a copper conductor and the corresponding terminal on the contact temperature.
Transactions of the american institute of electrical engineers. Heat, caused by an electrical current flowing through a conductor, will determine the amount of current a wire will handle. Aluminium cable acsr astm b aluminium conductor steel reinforced astm b 232 metric units code size kcm stranding no. High temperature overhead conductor rating considerations. Equations for calculating the currentcarrying capacity ampacity, loss of strength, and timetemperature characteristics of acsr conductors are illustrated and. Current carrying capacity acsr conductors electrical. Conductor data sheet aluminum conductors steel reinforced acsr approx. Acsr aluminum conductor steel reinforcedis used as bare overhead transmission cable and as primary and secondary distribution cable. Low loss conductor will have high current carrying capacity approx.
Head office 207 sunshine road tottenham australia aerial. The wires s which form the core are made by galvanized steel and external layer s are of aluminum. Email this page download pdf download pdf printable page. Acsr aluminum conductors steel reinforced 30 these conductors are formed by several wires of aluminum and galvanized steel, stranded in concentric layers. R losses where i is the electrical current and r is the electrical resistanceof the conductor. Current carrying capacity of acsr panther, moose, zebra conductors. Aaac conductors are available in single and multilayer constructions. Current ratings based on 75 c conductor temperature, 25 c ambient, 2st wind, 96wattssq. Aac consists of 50h19 aluminum, is lightweight and corrosionresistant and is commonly used in overhead line installations where higher strength or temperature ratings are not required.
Autocad format and manuals in pdf format, for offered item shall be. Current carrying capacity of acsr conductor depends upon following. Factors that enabled apar to emerge as the lowest cost producer of aluminium conductors in the world include increase in the installed capacity, strategic location of manufacturing facilities in favorable geographies, tax jurisdictions, backward integration and. Ieee websites place cookies on your device to give you the best user experience. The minimum requirement of manufacturing capacity of offered type, size and rating of equipment shall be 7 times tender. The conductor consists of one or more layers of aluminium wires stranded over a high strength steel core that can be single or multiple strands depending on the requirement.