IEC 60840:2011

Overview

IEC 60840:2011 is an international standard published by the International Electrotechnical Commission (IEC) that defines the test methods and requirements for power cables with extruded insulation and their accessories, used for rated voltages above 30 kV (Um = 36 kV) up to 150 kV (Um = 170 kV). This standard applies specifically to single-core cables and individually screened three-core cables and their accessories intended for fixed installations operating in standard conditions. It is a critical reference for manufacturers, installers, test laboratories, and users who need to ensure the reliability, performance, and safety of high-voltage power cable systems.

Key Topics

IEC 60840:2011 covers a comprehensive range of topics fundamental to the design, installation, and verification of power cable systems with extruded insulation. Key subjects include:

• Test Methods: Specifies procedures for routine, sample, type, and prequalification tests for cables, accessories, and complete cable systems.
• Product Scope: Addresses both cables and accessories (e.g., joints and terminations), outlining requirements for each as standalone or as part of a complete system.
• Application Conditions: Focuses on “usual” installation types and environments, and does not directly address cables for specialized use like submarine cables.
• Type Approval: Details the requirements for type approval and the range of products under each approval method, allowing flexibility for manufacturers and users.
• Prequalification Testing: Introduces a prequalification procedure for cable systems subject to high electrical stresses, ensuring long-term performance reliability.
• Test Definitions: Clarifies test classifications, such as routine, sample, type, and prequalification tests, and defines relevant technical terms.

Applications

IEC 60840:2011 is widely applied in the following contexts:

• Design and Manufacturing: Power cable and accessory manufacturers rely on this standard to meet quality, safety, and performance requirements for high-voltage installations.
• System Installation: Installers and project managers utilize the defined testing regimes to verify the integrity and suitability of installed cable systems for rated voltages between 30 kV and 150 kV.
• Type Testing and Certification: Testing laboratories and certification bodies use these methods to confirm that products comply with international standards, facilitating market access and regulatory compliance.
• Quality Assurance: Utilities and owners specify compliance with IEC 60840 in project documentation and procurement to ensure reliable, standardized operation of electrical grids and industrial installations.
• Long-term Performance Validation: The introduction of prequalification testing helps engineers and asset managers ensure the reliability of systems exposed to high electrical stresses, reducing the risk of premature failures.

Related Standards

Compliance with IEC 60840:2011 often involves reference to additional IEC standards, including:

• IEC 60060-1: High-voltage test techniques – definitions and requirements.
• IEC 60228: Conductors of insulated cables.
• IEC 60229: Tests on extruded oversheaths with a special protective function.
• IEC 60287-1-1: Current rating equations and cable loss calculations.
• IEC 60811 series: Test methods for cable insulating and sheathing materials.
• IEC 60885-3: Partial discharge measurement methods for extruded power cables.

Using IEC 60840:2011 ensures alignment with globally recognized best practices for the supply, installation, and maintenance of high-voltage power cable systems. This harmonization supports operational safety, product interoperability, and the long-term reliability of electrical infrastructure in energy, utility, and industrial sectors.