(STACIR) Invar Steel Recinforced Super Thermal Aluminum Conductors is similar to the ACSR family of conductors except the standard steel core is replaced with a special iron-nickel alloy(INVAR) steel core.Invar is typically Aluminum clad to provide corrosion resistance at elevated operating temperatures. Invar core has only 25% coeffcient of thermal expansion than galvanized steel core.
Invar steel wire & super thermal resistant Aluminum Alloy wires.
IEC 61089
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