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High Temperature Conductor, Hot Conductor, Black Conductor, High Temperature Conductors, Hot Conductors, Black Conductors

More than 50% power increase with the same cross section.


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Application

Changing to high temperature conductors (Hot and Black conductors) has approved as an excellent technical and economical solution for revitalisation of old overhead lines or for bottleneck applications.

Product Description Hot Conductors

Starting from high grade aluminium (99,7 % purity) an alloy containing, among other elements, small amounts of zirconium is produced. With additional processing, a structure with a high recrystallization temperature is attained, thereby the mechanical properties of this material are maintained in continuous operation at higher temperatures (150 °C). In this way the current carrying capacity could be increased by over 50%.

Because of the combination of temperature resistant aluminium (TAL) and aluminium clad steel wires (ACS) the stranding can be done without grease. The mechanical properties of the temperature resistant aluminium (TAL) wires correspond to those of pure aluminium (99,5%)

Product Description Black Conductors

Coated hot conductors are a further development. These are blackened by a patented spray process with a permanent layer of black polyurethane coating on their surface. The black surface means a higher radiation of temperature, so the current carrying capacity could be increased by up to 70% in total.

The coating of the conductors fulfils all requirements:

Mechanical and Electrical Properties

Due to the higher temperature tolerance of the conductors up to 150 °C more energy can be transmitted compared to standard aluminium steel conductors (ACSR) of the same section.

This advantage is achieved by the special properties of the temperature resistant aluminium (TAL) wire:

 conductivity
[S*m/mm²]
min.
tensile
strength
[N/mm²]
modulus of
elasticity
[N/mm²]
coefficient
of
expansion
[1/°C]
permissible maximum operating temperature [°C]
continuous
operation
short-time
< 30 min
short-circuit
TAL34,8160 - 19060.0002,3 * 10E-5150180260
E-AL35,38160 - 19060.0002,3 * 10E-58080160

Using black conductors (BTAL/ACS) increases the transmission power additionally. The comparison of several sections shows this advantage:

nominal
section
[mm²]
linear weight
[kg/km]
calculated
tensile strength
[kN]
resistivity
at 20 °C
[Ω/km]
permissible continuous current
[A]
ACSRTAL/ACSACSRTAL/ACSACSRTAL/ACSACSRTAL/ACSBTAL/ACS
120/2049146744,5045,090,23760,2286410645690
240/4098093285,1287,490,11880,114464010101090
300/5012271167105,09108,060,09490,091474011701270
560/5019401879146,28149,250,05150,0508104017151870

*)AL/St = ACSR = aluminium/steel (standard conductor)
 TAL/ACS = temperature resistant aluminium/ACS (Hot Conductor)
 BTAL/ACS = temperature resistant aluminium/ACS, black coating (Black Conductor)


Products
Conductors
Invar Conductors Gap-type Conductors Steel supported Conductors Sheat-type Conductors
Hot and Black conductors Camouflage Conductor Silent Hollow Conductor
Services
Application Consulting
Stranding of OPGW Coating of Conductors Tensile Testing

 
 
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