Low voltage switchgear standards are developed by several international and regional organizations to ensure the safety, reliability and performance of electrical systems. Some commonly used reference standards for low voltage switchgear include:
International Electrotechnical Commission (IEC) standards:
IEC 61439: This standard specifies the requirements for Low voltage Switchgear and control equipment components. It covers aspects of the design, construction, performance and testing of switchgear components.
IEC 60947 Series: This series consists of multiple parts covering the performance and testing requirements for low-voltage switchgear and control equipment, focusing on specific equipment such as circuit breakers, contactors, switches, etc.
National Electrical Manufacturers Association (NEMA) standards:
NEMA Standards: In the United States, NEMA publishes standards related to electrical equipment, including low-voltage switchgear. NEMA standards address aspects such as design, construction, and performance standards for different types of electrical equipment.
European Committee for Electrotechnical Standardization (CENELEC) standards:
EN 61439: Similar to IEC 61439, this European standard specifies requirements for low voltage switchgear and control equipment components, ensuring EU-wide safety and performance compliance.
Specific national or regional standards:
Many countries or regions have their own specific standards or regulations related to low voltage switchgear. For example, UL (Underwriters Laboratories) standards in the United States, CSA (Canadian Standards Association) standards in Canada, and other national standards in different countries.
These standards typically cover various aspects such as electrical ratings, safety requirements, environmental conditions, temperature rise limits, short circuit withstand capability, protection against electric shock, etc.
Compliance with these standards ensures that Low voltage Switchgear is designed, manufactured, installed and maintained to recognized safety and performance standards, ensuring personnel safety, electrical system reliability and compliance with regulatory requirements.