... GB/T18813-2002 standards, and provides the requirements for transformer copper, testing methods, inspection rules, marking, packaging, ... , storage and contract content. This standard applies to copper wound transformer coil. Table 1 strip grades, status, ... electrical properties of stripTrademarkConductivity /% IACS is not less thanResistivity / ∩ · mm2 / m is not greater thanTU11000.017 241T2980.017 ...