Technical Articles

What is IEC 60439?

IEC 60439 is an international standard that outlines the requirements for low-voltage switchgear and controlgear assemblies. This standard ensures the safety and functionality of these electrical installations, providing guidelines for their design, manufacturing, and testing.

Purpose and Scope

The main purpose of IEC 60439 is to establish a set of criteria to ensure the reliability and safety of low-voltage switchgear and controlgear assemblies. These assemblies are crucial in controlling and distributing electrical power in various industries such as manufacturing, commercial buildings, and infrastructure substation systems.

This standard applies to assemblies such as distribution boards, motor control centers, and other similar electrical configurations specified within its scope. It provides guidelines for their design, construction, and testing to meet specific performance and safety requirements.

Key Requirements

In order to comply with IEC 60439, manufacturers must adhere to several key requirements, including:

Verification of the assembly's electrical and mechanical properties through routine testing

Ensuring proper temperature-rise limits in critical components

Implementing appropriate protection against electric shock and short circuits

Designing suitable enclosures to protect against external influences

Providing clear instructions and markings for installation, operation, and maintenance

Ensuring compatibility with specified supply voltages and maximum rated currents

Benefits and Importance

Compliance with IEC 60439 brings several benefits and importance:

Enhanced safety and reduced risk of electrical hazards for both personnel and equipment

Increased reliability and performance of electrical installations

Interchangeability and compatibility of switchgear and controlgear assemblies from different manufacturers

Clear guidelines and requirements for designers, manufacturers, and end-users

Global harmonization of safety standards, facilitating international trade

Overall, IEC 60439 plays a crucial role in ensuring the reliability, safety, and performance of low-voltage switchgear and controlgear assemblies. Its comprehensive guidelines and requirements help manufacturers produce high-quality electrical installations, benefiting industries worldwide.



Contact: Nina She

Phone: +86-13751010017


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