With the development of the power industry, the capacity of a single transformer is increasing day by day. Therefore, the power industry proposes improvement requirements for the structure of transformers in accordance with the principles of increasing capacity, saving materials, improving labor productivity, reducing costs, and reducing usage volume, in order to improve the operational efficiency and reliability of transformers.copper strips for transformer is megatrends Traditional transformers use wire winding structures (oil immersed transformers), while transformers with strips winding structures made of pure copper strips (dry transformers) have extremely high dynamic and thermal stability, especially in short circuit conditions;High space utilization rate; The manufacturing process is simple and can be automatically wound, making it easy to achieve mechanized production with high winding efficiency; Uniform heat distribution, small volume, light weight, large capacity, material saving, good energy-saving effect, low no-load loss, good heat dissipation performance, easy welding, no axial force, long service life, no pollution, lifelong maintenance free, and many other advantages have been widely used in transmission and distribution engineering, and will gradually replace transformers with wire winding structures.

Correspondingly, copper strips for transformer used for high-voltage windings are called high-voltage strips, and copper strips used for low-voltage windings are called low-voltage strips. At present, there are dry-type transformers that use copper strips for transformer winding on both high and low voltage sides, as well as dry-type transformers that use copper wire on the high voltage side and copper strips on the low voltage side. Copper strips is also used for winding the low-voltage side of oil immersed transformers.

	C1020/C10200/Cu-ETP/UNS T2/TU1
	O
	0.3mm-3.5mm
	10mm-1400mm

	-5%--+10%
	Ø300mm, Ø400mm, Ø500mm or customized
	GB/T 18813-2014/EN 13599/JIS-H3100-2006 or as customer's specification

●7S management of the total QC control.

●100% Qualified rate.

Copper has high electrical conductivity. In fact, the electrical conductivity of copper is the highest among all non-precious metals. This property makes copper strips the preferred material for many electrical appliances.

Corrosion-resistance:

Stage 1: Melting Down Copper

Today, copper is typically melted down in an electric furnace known as an induction furnace where they are better able to reach and monitor the required temperature for melting this ore; copper has a high melting point of 1083 degree (1981 degree F). Induction furnaces are extremely pricey industrial equipment, but they do ensure a level of safety that is not present in foundries that are self-built. Typically, copper is melted down by itself but, occasionally, other materials such as zinc may be added to create a copper alloy.

Stage 2: Laboratory Test

Stage 3: Cutting

After each batch is approved, it is formed into a copper strip. The entire copper strip is then placed on a cutting table, and cut off using a cutting wheel saw. Then the copper strip's uneven surface is smoothed using a copper strip surface washing machine, which is advantageous for the copper strip's later-processed surface for smoothness and flatness.

Stage 4: Hot Rolling

Next, the copper strip is heated at a temperature of 1,000 degree (1,832 degree F), and then rolled to ensure a uniform thickness and create a more workable material.

Stage 5: Washing With Water

Stage 6: Rolling the Plate

Copper has a specific gravity of 8.9 and aluminum has a specific gravity of 2.7. This means that for every gram of aluminum you need 2.7 grams of copper to produce the same volume.

The density difference between aluminum and copper can be used to determine how much more material is required for an application using aluminum rather than copper. For example, if you need 100 pounds per square foot (psf) of insulation on your transformer core, then you would need approximately 133 psf if it were made with aluminum instead of copper because 2.3 times more material would be required by the transformer manufacturer in order to achieve the same amount of insulation when comparing their densities together.

Aluminum strip has the electrical conductivity of above 60%IACS.
While copper strip has the electrical conductivity of 99.80%IACS.

A: While copper wiring is heavier than aluminum wiring, it is often used to make smaller and lighter transformers. This is because copper offers higher electrical conductivity levels than aluminum. The resistivity of copper is 0.6 times that of aluminum.

A: High melting point ensures the wires do not burn at very high temperatures and the electrical appliances remain secure. It means if you are using wires with copper strips, you don't need to worry about electrical fluctuations or fire hazards. Corrosion-resistance: Copper is resistant to corrosion.

A: Copper rod cannot be charged easily by friction because it is a conductor, only non-conducting material gets charged by friction.

A: The primary benefits of copper foil strip are its excellent resistance to heat and chemicals, high-temperature resistance, anti-interference, and high stickiness.

A: The copper strip will corrode in water and must be replaced on regular intervals. The rate of corrosion will depend on the environment, with increasing salinity and temperature accelerating the corrosion process. For challenging, warm, marine environments the copper strip should withstand deployments of 60 days or more.

A: Copper has very low resistivity. By using thick copper wires the resistivity is reduced further. Thick copper wires have a larger area and the resistance of wire becomes negligible. The connections between the resistors are made of thick wires so as to increase the rate of cross-section.

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