Shipped Aluminium Wire For Windings In Oil Immersed Transformers To America

The insulation for the double enameled round wires are:
First layer or Base coat – Polyester or polyester-imide
Second layer or Over coat – Polyamide-imide

Thermal index = 200 ºC
Breakdown voltage > 2500 V

Aluminium characteristics:
Specific weight at 20°C = 2.7 gr/cm3
Melting temperature = 658° C
Specific heat from 15 to 100°C = 0.217 cal/gr °C
Thermal conductivity =0.52 cal/sec/cm2/cm/°C
Tensile strength = 8-14 daN/mm
Elongation = 10-30 %
Resistivity at 20 °C ≤ 0.028 Ω mm2/m
Conductivity at 20°C ≥ 35.5 m/ Ω mm2
IACS conductivity at 20C = 62%
Diameter of Aluminium wire from Φ 0.56 mm up to Φ 5 mm acc.to I.E.C

For all categories of conductor the standard composition is 99.8% aluminium.

Technical standards:
IEC EN 60317-25 for round wire
IEC EN 60317 for flat wire