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Gap-type Conductor/ Gap-type Conductors - GZTACSR


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Gap-type Conductors

These conductors have a special construction feature with a small gap filled with grease between the high strength steel core and the thermal resistant Al-Zr alloy conductive layers. This allows:

Installation method of GZTACSR is well but requires skilled specialists because at the time of sagging, a special sagging method is required to apply all the tension to the steel core only.

Gap-type conductors are particularly suitable to replace ACSR conductors in flat lands or in any case with small difference in level.

 


 

Specification EXAMPLE - Other Designs According to Customers' Requirements

Gap-type Super Thermal Resistant Aluminium Alloy Conductor Steel Reinforced
GZTACSR 18,6mm
IEC 60888 S3A steel core + IEC 62004 AT3 aluminium alloy (ZTAL)
CONDUCTOR PROPERTIES
Diameter [mm] 18,60
Formation Steel wires No. × [mm] 7 × 2,20
Gap No. × Thick [mm] 1 × 1,20
AT3 formed wires No. × Thick [mm] 24 × 2,40
Section Steel wires [mm] 26,6
AT3 formed wires [mm] 189,4
Total [mm] 216,0
Mass Steel wires [kg/km] 208
Grease [kg/km] 23
AT3 formed wires [kg/km] 524
Total [kg/km] 754
DC Resistance at 20C [Ω/km] 0,1553
Rated Tensile Strength Core [kN] 42,31
Total [kN] 72,99
Modulus of Elasticity Core [GPa] 200
Total [GPa] 73
Coefficient of Linear Expansion Core [10-6/C] 11,5
Total [10-6/C] 19,1
Ampacity (IEC 1597) (210 C) [A] 907
CORE PROPERTIES
Material Specification IEC 60888 S3A Extra High Strength
Stress at Rupture [MPa] 1590
Conductivity [%IACS] -
Formation No. × [mm] 7 × 2,20
Dimension & tolerance Wires [mm] 2,20 0,03
Core diameter OUT [mm] 6,60 1%
Section Wires [mm] 3,80
Total [mm] 26,61
Mass Total steel [kg/km] 208,10
Central Wire [mm] 2,20
1st Strand No. × [mm] 6 × 2,20
Lay Ratio / Direction 19 / R.H.
Strand Increment % 0,606%
DC Resistance at 20C [Ω/km] -
Greased NO
GAP
Formation No. - Position 1 - Between core and Al
Dimension & tolerance Inner diameter IN [mm] 6,60 1%
Outer diameter OUT [mm] 9,00 1%
Filling Grease Specification EN 50326 20A210
Density [kg/m] 870 (normative)
Fill Factor % 70
Mass [kg/km] 22,54
CONDUCTIVE LAYERS PROPERTIES
Material Specification IEC 62004 AT3 Al alloy (ZTAL)
Tensile Strength [MPa] 162
Conductivity [%IACS] 60,0%
Formation No. × Thick. [mm] 24 × 2,40
Dimension & Tolerance Formed Wires Thickness [mm] 2,40 0,03
Inner Diameter IN [mm] 9,00 1%
Outer Diameter OUT [mm] 18,60 1%
Section Wires (1st Strand) [mm] 78,22
Wires (2nd Strand) [mm] 111,15
Total [mm] 189,37
Mass Total [kg/km] 523,86
1st Strand No. × Thick. [mm] 10 × 2,40
Lay ratio / Direction 14 / L.H.
Strand Increment % 1,704%
2nd Strand No. × Thick. [mm] 14 × 2,40
Lay Ratio / Direction 11,5 / R.H.
Strand Increment % 2,792%
DC Resistance at 20C [Ω/km] 0,1553
Greased NO
Emissivity Treatment NO

In accordance with IEC 62420, IEC 62219, IEC 60888, IEC 62004

In case the numerical value in this specification example and the international standard value are different, the numerical value in this example has priority.

Ambient temperature 20C: Wind speed 0,60m/s Emissivity ε=0,5 Absorptivity α=0,5 Intensity of solar radiation 900W/m
Ambient temperature 30C: Wind speed 0,60m/s Emissivity ε=0,5 Absorptivity α=0,5 Intensity of solar radiation 900W/m
Ambient temperature 40C: Wind speed 0,60m/s Emissivity ε=0,5 Absorptivity α=0,5 Intensity of solar radiation 900W/m
Conductor Temperature
[C]
Resistivity
[Ω/km]
Ampacity [A]
20C30C40C
300,1616188  
400,1678342181 
500,1740437332175
600,1802510427324
700,1864569498417
800,1926618556487
900,1988661606545
1000,2051699648594
1100,2113733686637
1200,2175763720675
1300,2237791751709
1400,2299817779740
1500,2361841805769
1600,2423863830795
1700,2486884853820
1800,2548904874843
1900,2610923895866
2000,2672942914887
2100,2734959933907

 
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Services
Application Consulting
Stranding of OPGW Coating of Conductors Tensile Testing

 
 
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