BS EN 61439-2:2018 is a professional technical standard that sets out the requirements for low voltage switchgear and controlgear assemblies. It is part of a series of standards developed by the International Electrotechnical Commission (IEC) to ensure the safety, reliability, and performance of electrical systems.
Scope and Objectives
The scope of BS EN 61439-2:2018 covers all types of low voltage switchgear and controlgear assemblies, including distribution boards, motor control centers, and power factor correction equipment. The standard specifies the design, construction, testing, and performance requirements for these assemblies.
The primary objective of BS EN 61439-2:2018 is to provide guidelines and criteria for manufacturers, designers, and installers to ensure that the assembled products meet the necessary safety and performance requirements. Compliance with this standard is essential not only for ensuring the safety of users but also for meeting legal and regulatory obligations.
Key Requirements
BS EN 61439-2:2018 outlines various key requirements that must be met by low voltage switchgear and controlgear assemblies. These include:
Clearances and Creepage Distances: The standard specifies the minimum clearances and creepage distances between live parts, as well as between live parts and accessible parts or protective materials. These requirements are crucial for preventing electric shocks and arcing faults.
Mechanical Strength and Electrical Continuity: The assembly must have adequate mechanical strength to withstand various mechanical stresses, such as thermal expansion and short-circuit forces. Additionally, it must provide effective electrical continuity throughout its service life.
Temperature Rise: The standard sets limits on the temperature rise of the assembly under normal operating conditions. This is important to prevent overheating and ensure the longevity of electrical components.
Dielectric Properties: BS EN 61439-2:2018 requires that the switchgear and controlgear assemblies have suitable dielectric properties to withstand voltage stress and avoid insulation failures.
Testing and Verification
Compliance with BS EN 61439-2:2018 is determined through a series of tests, including type tests, routine tests, and verification tests. These tests assess various aspects such as temperature rise, short-circuit withstand capability, and dielectric properties.
Manufacturers are required to perform these tests either internally or by engaging third-party testing laboratories. Test reports and documentation must be available to demonstrate compliance with BS EN 61439-2:2018.
Conclusion
BS EN 61439-2:2018 is a crucial technical standard for ensuring the safety, reliability, and performance of low voltage switchgear and controlgear assemblies. Compliance with this standard is vital for manufacturers, designers, and installers to meet legal requirements and provide products that protect users from electric shocks and other hazards.
Nina She