What is IEC 60840?

IEC 60840 is a technical standard that focuses on the performance and safety requirements for power cables used in electric power transmission and distribution networks. This standard was developed by the International Electrotechnical Commission (IEC), an international standards organization responsible for establishing and promoting global standards in the field of electrical engineering and electronics.

Scope and Purpose

The IEC 60840 standard covers a wide range of aspects related to power cables, including their design, construction, testing, installation, and maintenance. Its main objective is to ensure the reliability and efficiency of power cable systems, as well as the safety of personnel and equipment involved in power transmission and distribution.

The standard addresses various types of power cables, such as extruded solid dielectric cables, oil-filled cables, and gas-pressure cables. It specifies requirements related to their electrical performance, mechanical strength, thermal behavior, and resistance to environmental conditions such as moisture, heat, and chemical exposure.

Key Requirements and Testing Procedures

IEC 60840 defines important parameters and characteristics that power cables must meet, including voltage ratings, current carrying capacity, impedance, insulation thickness, and conductor size. It also outlines specific tests that should be conducted to assess the compliance of cables with these requirements.

Among the commonly performed tests are high-voltage tests, partial discharge tests, and insulation resistance tests. These tests aim at assessing factors such as the ability of the cable insulation to withstand high voltages without breakdown, the existence of any partial discharges that may indicate insulation defects, and the overall integrity of the cable's insulation system.

Benefits and Impact

The implementation of IEC 60840 brings several benefits to both manufacturers and users of power cables. By complying with this standard, manufacturers can ensure the quality and reliability of their products, which in turn enhances their reputation and market competitiveness.

For users of power cables, adherence to IEC 60840 means greater confidence in the safety and performance of the installed cable systems. This promotes efficient and effective power transmission and distribution, minimizing the risks of accidents, power disruptions, and equipment failures.

In conclusion, IEC 60840 plays a crucial role in the power cable industry by providing a comprehensive set of requirements and testing procedures for the design, manufacture, and use of power cables. Its application contributes to the overall improvement of power system reliability, safety, and efficiency.