What is IEC 61089 and why is it important for overhead electrical stranded conductors?

IEC 61089 is an international standard that specifies the electrical and mechanical characteristics of round wire concentric lay overhead electrical stranded conductors. These conductors are used for power transmission and distribution lines, and are composed of one or more layers of aluminium wires stranded over a steel core.

The standard was first published in 1991 by the International Electrotechnical Commission (IEC), and it superseded four previous standards: IEC 60207, 60208, 60209 and 60210. The standard covers various aspects of the conductors, such as material, surface, stranding, joints, linear density, strength, tests, packaging and marking. It also provides information to be supplied by the purchaser, a stress-strain test method, nominal mass of grease for stranded conductors, and recommended conductor sizes and tables of conductor properties.

INTERNATIONAL IEC STANDARD 61089.pdfl

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IEC 61089 is important because it ensures the quality, performance and safety of the overhead electrical stranded conductors. It also facilitates the international trade and exchange of these products by providing a common language and criteria for their design, manufacture and testing. The standard is widely adopted by many countries and regions around the world.

If you want to learn more about IEC 61089 or purchase a copy of the standard, you can visit the official website of the IEC at https://www.iec.ch. You can also find some examples of ACSR conductors manufactured to IEC 61089 at https://www.jytopcable.com/uploads/soft/technical-documents-Catalog/overhead-bare-conductor/ACSR-Conductor-Specification-To-IEC61089.pdf.

One of the main advantages of using round wire concentric lay overhead electrical stranded conductors is that they have a high current carrying capacity and a low resistance. This means that they can transmit more power with less energy loss and voltage drop. They also have a high tensile strength and a good resistance to corrosion, which makes them suitable for long spans and harsh environments.

Another benefit of using these conductors is that they have a high flexibility and a low sag. This means that they can adapt to different terrain and weather conditions, and they can maintain a safe clearance from the ground and other objects. They also have a low weight and a small diameter, which reduces the cost of installation and maintenance.

However, these conductors also have some drawbacks that need to be considered. For example, they are susceptible to galvanic corrosion when in contact with different metals, such as copper or iron. They also have a high thermal expansion coefficient, which means that they can elongate or contract significantly due to temperature changes. They also have a low modulus of elasticity, which means that they can experience permanent deformation under high stress. 0efd9a6b88

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