There are four major types of overhead conductors used for electrical transmission and distribution. AAC - All Aluminum Conductor. AAAC - All Aluminum Alloy Conductor. ACSR - Aluminum Conductor Steel Reinforced. ACAR - Aluminum Conductor Aluminum-Alloy are conductors named after animals? Approx. Maximum dc. Code overall. Rated resistance. Name. Steel. Total. Aluminium. Steel diameter Aluminium. Steel. Total Strength at 20 oC. AWG or. AWG or. ACSR. LOW-VOLTAGE SECONDARY CONDUCTORS The names are included for information purposes only. Although they are.
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The trapezoidal wire layers are separated from each other and from the steel core by the two smaller annular gaps that permit movement between the layers.
The round aluminium wire layers are in tight contact with each other and the underlying trapezoidal wire layer. Under vibration, the steel core and the aluminium layers vibrate with different frequencies and impact damping acsr conductor names.
This impact damping is sufficient to keep any Aeolian vibration to a low level. The use of trapezoidal strands also results in reduced conductor diameter for a given AC resistance per mile. Reduced diameter for a given Acsr conductor names resistance yielding reduced structure transverse wind and ice loading.
There most acsr conductor names will be increased installation and clipping costs due to special hardware requirements and specialized stringing methods. The conductor design always requires the use of a steel core even in light loading areas. Aluminium-conductor steel supported[ edit ] Aluminium-conductor steel acsr conductor names ACSS conductor visually appears to be similar to standard ACSR but the aluminium strands are fully annealed.
Annealing the aluminium strands reduces the composite conductor strength, but after installation, permanent elongation of the aluminium strands results in a much larger percentage of the conductor tension being carried in the steel core than is true for standard ACSR.
This in turn yields reduced composite thermal elongation and increased self-damping.
Acsr conductor names
The major advantages of ACSS are: Since the aluminium strands are "dead-soft" to begin with, the acsr conductor names may be operated at temperatures in excess of Degrees C Celsius without loss of strength. Since the tension in the acsr conductor names strands is normally low, the conductor's self-damping of Aeolian vibration is high and it may be installed at high unloaded tension levels without the need for separate Stockbridge-type dampers.
The major disadvantages of ACSS are: In areas experiencing heavy ice load, the reduced strength of this conductor relative to standard ACSR may make it less desirable. The softness of the annealed aluminium strands and the possible need for pre-stressing prior to clipping and sagging may raise installation costs.
Twisted pair[ edit ] Twisted pair TP conductor sometimes called acsr conductor names the trade-names T-2 or VR has the two sub-conductors twisted usually with a left-hand lay about one another generally with a lay length acsr conductor names approximately three meters nine feet.
The sub-conductors can be any type of standard ACSR conductor but the conductors need to match one another to provide mechanical balance.
The major advantages of TP conductor are: In an ice storm when ice deposits acsr conductor names to accumulate along the conductor the twisted conductor profile prevents a uniform airfoil shape from forming.
With a standard round conductor the airfoil shape results in uplift of the conductor and initiation of the galloping motion.
What are the types of ACSR conductors? - Quora
The TP conductor profile and this absence of the uniform airfoil shape inhibits the initiation of the galloping motion. The reduction in motion during icing events helps prevent the phase conductors from contacting each other causing a fault and an associated outage of the electrical circuit.
With the reduction in acsr conductor names amplitude motions, closer phase spacing or longer span lengths can be used.