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1 Es 3). Gap type thermal-resistant aluminum alloy conductor steel reinforced o Gap type super thermal-resistant aluminum alloy conductor steel reinforced 1(M). GTACSR/ gztacsr has a unique construction featuring a small gap between the steel core and (super) thermal-resistant (. aluminum alloy layer. The combination of the (super) thermal resistant aluminum alloy and the " Gap construction" offers excellent sag and current-carrying characteristics. With this advantage, GTACSR/ gztacsr is useful to up-rate an existing transmission line by simply replacing the existing conductor to GTACSR/ gztacsr . Advantage Op Double*1 the current-carrying capacity for the same size conductor. No modification or reinforcement required for existing towers. Low cost and short construction period. Note : TAI (Thermal-resistant aluminum alloy) - times current capacity ZTAI (Super thermal-resistant aluminum alloy)- Double current capacity Construction Extra high strength steel core is in the center and (Super) thermal-resistant aluminum alloy is supplied in conductor part.

2 P. To maintain the gap between the steel core and aluminum inner layer, the inner layer wires are trapezoid shaped. The thermal-resistant grease is filled to the gap to avoid friction between the steel core and aluminum inner layer. The aluminum layer and steel core move independently. Thermal-resistant aluminum alloy or Super thermal-resistant aluminum alloy Gap - filled with grease Sag (m). move Extra high strength Galvanized steel (EST). Feature Ampacity Sag GTACSR can carry times higher current than ACSR. of equivalent size. GTACSR sag (at 150 C) : 96% Maintain A. gztacsr sag (at 210 C) : 104% clearance gztacsr can carry 2 times higher current than ACSR Note:ACSR (sag at 90 C) : 100%. of equivalent size. T. s 2500 15. GTACSR/ gztacsr gztacsr . 14. 2000 GTACSR 13 *1 In Ampacity (A). ACSR Sag (m). 1500 12. 1000. ACSR. 11 I. 10.

3 Inst 500 Span length : 400m 9 spe ass 0 8. 0 200 400 600 800 0 50 100 150 200 250. Cross sectional area (mm2) Conductor temperature ( C). (Super) Thermal resistant aluminum alloy [TAI, ZTAI]. Thermal-resistant aluminum alloy (TAI) and Super thermal- resistant aluminum alloy (ZTAI) improve its thermal-resistant characteristics by adding zirconium. ZTAI and TAI can keep its Conductivity 60 tensile strength in high temperature condition. 50 TAI can withstand up to 150 C and can carry times current ZTAI of Hard drawn aluminum (1350). 60 ZTAI can withstand up to 210 C and can carry times TAI. 60 current of Hard drawn aluminum (1350). AI(1350). 61 Both TAI and ZTAI maintain nearly the same mechanical and electrical characteristics as Hard drawn aluminum (1350). 300. Op 200. era ting Pa) Properties ( ). Tem 150 200 th (M. per eng Material Tensile strength Elongation Conductivity Operating Current atu Str re 90.

4 100 sile (MPa) (%) (%) temp.( C) capacity ( C. ) Ten EC(HAI) 1. city apacity TAI ZTAI Principal behind small sag At the time of sagging, all tension is (Z)TAI applied to the steel core by a special Gap stringing method. As a result, the thermal Sag expansion characteristics of GTACSR/ gztacsr become that of steel core. The thermal expansion coefficient of steel core is X10-6(/ C). ACSR. and it is approximately half of normal Sag (m). Co-efficient of ACSR (around 20X10-6(/ C )). thermal expansion(/ C). GTACSR/ gztacsr . GTACSR/ gztacsr has better thermal ACSR : 19~20X10-6 expansion characteristics than Al : 23X10-6. Knee point temp. for ACSR St : conventional ACSR. (around 120 C). GTACSR So GTACSR/ gztacsr can maintain Temperature ( C). small sag in high temperature condition. Temp. at installation (=Knee point temp. for GTACSR/ gztacsr ).

5 Accessories e The size of dead-end clamp for GTACSR/ gztacsr is In case of replacing an existing transmission line, slightly larger than conventional ACSR allowing it to only compression type dead-end clamp should carry large current. be changed. Other accessories are same as conventional ACSR*1. Other accessories can be re-used. *1 In case suspension tower continues more than six spans, special semi-strain assembly is required. Installation Installation method of GTACSR/ gztacsr is basically the same as conventional ACSR. Only at the time of sagging, a special sagging method is required to apply all the tension to the steel core. JPS can dispatch a skilled supervisor for assistance in the installation work. Design GTACSR/ gztacsr can be designed to have the same mechanical characteristics as existing ACSR. Design examples are shown below.

6 Size mm2 185 240 265 310 370. Equivalent conductor Lynx Hawk Hen Goose Redwing 14/ TZ*1( ) 15/ TZ( ) 19 16 17 (Z)TAI. Stranding No/mm 10/TZ( ) 10/TZ( ) 10/TZ( ) 10/TZ( ) 12/TZ( ). Est 7 7 7 7 7 Rated Tensile Strength kN GTACSR/ gztacsr Diameter mm Steel core Aluminum Cross sectional area Steel core mm2 Total Weight Aluminum kg/km 1098 1227 1666. at 20 C /km Current carrying GTACSR(150 C) 713 863 919 1021 1147. A. capacity*2 gztacsr (210 C) 871 1058 1128 1255 1414. GTACSR/ gztacsr Modulus of elasticity GPa Steel core Coefficient of linear GTACSR 10-6/ C. expansion Steel core Size mm2 410 413 520 620. Equivalent conductor Condor Drake - - 18/TZ( ) 16/TZ( ). 15 16 (Z)TAI 14/TZ( ) 12/TZ( ). Stranding No/mm 10/TZ( ) 10/TZ( ). 10/TZ( ) 12/TZ( ). Est 7 7 7 7 Rated Tensile Strength kN GTACSR/ gztacsr Diameter mm Steel core Aluminum Cross sectional area Steel core mm2 Total Weight Aluminum kg/km 1557 1616 1856 2179.

7 At 20 C /km Current carrying GTACSR(150 C) 1257 1219 1356 1516. A. capacity*2 gztacsr (210 C) 1500 1503 1667 1866. GTACSR/ gztacsr Modulus of elasticity GPa Steel core Coefficient of linear GTACSR 10-6/ C. expansion Steel core *1: TZ: Trapezoid wire *2: Ambient temp.: 40 degree C, Wind , Wind direction: 45degree, Solar radiation: , Absorptivity & Emmisivity of conductor surface: Supply record GTACSR/ gztacsr was developed 30 years ago and have been supplied more than 2,600km (up to 2004). GTACSR/ gztacsr has been used not only in Japan but also in the world. GTACSR/ gztacsr have been supplied to more than ten countries. J-Power Systems Corp. internet: Head Office Overhead Transmission Line Division Mita 43 Mori Bldg., Toyoura-works, 3-13-16, Mita, Minato-ku, 4-10-1, Kawajiri-cho Hitachi-shi, Tokyo, 108-0073, Japan Ibaraki-ken, 319-1411, Japan Phone: +81-3-5232-4710 Phone: +81-294-43-2131.

8 Fax: +81-3-5232-4718 Fax: +81-294-42-8456. Printed in Japan '05-1(M).