This document describes two types of high ampacity conductors: STACIR and STACIR/TW. STACIR conductors have an inner core of aluminum-clad invar steel surrounded by a layer of super thermal resistant aluminum alloy wires. STACIR/TW conductors have a similar design but with the aluminum alloy wires arranged in two layers separated by invar steel wires. Tables provide the specifications for various conductor sizes, including their construction, dimensions, weight, current capacity, and mechanical strength. These conductors can operate at higher temperatures than conventional conductors, carrying more than 100% greater current.
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3.-Invar.pdf
1. Construction
Aluminium-Zirconium wires (Type-AT3), concentrically stranded over a Aluminum Clad Invar Steel core.
Values based on following Specifications:
• Thermal-resistant aluminium alloy wires (Type-AT3) for overhead line conductor as per IEC 62004
• Concentric lay overhead electrical stranded conductors IEC 61089, IEC 62219 or ASTM B779
• Aluminium-clad steel wires for electrical purposes IEC 1232, JCS 1404 & More.
Features:
• These can operate upto 210°C with specified strength loss,
• Can carry 100~150% more current as that of ACSR of the same size.
• For uprating lines, no modifications or reinforcement is required to the existing towers
SUPER THERMAL RESISTANT ALUMINUM ALLOY CONDUCTOR, ALUMINUM CLAD INVAR REINFORCED (STACIR & STACIR/TW)
High Temperature Thermal Resistant Alloy Conductor : These are high ampacity conductors with inner core composed of Aluminum clad Invar Steel (Ni-
Fe Aloy) & outer layer composed of Super Thermal Resistant Aluminium alloy with round or trapezoidal shaped wires.
Super Thermal Resistant Al.Alloy Wires
Aluminum Clad Invar Steel Wires
Super Thermal Resistant Al.Alloy Wires
Aluminium Clad Invar Steel
Available with Non-Specular (Dull) Surface Finish and Color Coated as per customized requirements.