What is UL 60947-6-5:2020?

UL 60947-6-5:2020 is a technical standard that establishes requirements for industrial control equipment, specifically for AC semiconductor motor controllers and starters. This standard was developed by Underwriters Laboratories (UL), an independent safety science company.

Scope and Purpose

The purpose of UL 60947-6-5:2020 is to ensure the safety and performance of AC semiconductor motor controllers and starters used in various industrial applications. It sets forth requirements for product design, construction, testing, and marking to minimize the risk of electric shock, fire, and mechanical hazards.

Main Requirements

The standard defines specific requirements for motor controllers and starters, including their current ratings, short-circuit withstand capabilities, downstream circuit protection, temperature limits, environmental conditions, and electrical isolation between the power circuit and contact elements.

According to UL 60947-6-5:2020, motor controllers and starters must be capable of safely interrupting the motor current, provide adequate protection against electric shock, and have proper thermal withstand properties to prevent overheating.

Compliance and Certification

In order to comply with UL 60947-6-5:2020, manufacturers must follow the specified requirements during the design, production, and testing processes. Once a product meets all the necessary criteria, it can be submitted for certification by a certified testing laboratory recognized by UL. If the product successfully passes the tests, it will receive a UL mark, indicating its compliance with the standard.

It's important to note that certification is voluntary. However, many industries and customers require products to meet UL standards to ensure their safety and quality. By complying with UL 60947-6-5:2020, manufacturers can demonstrate the reliability and credibility of their industrial control equipment.

In summary, UL 60947-6-5:2020 is a technical standard that sets forth safety requirements for AC semiconductor motor controllers and starters used in industrial applications. Compliance with this standard ensures the performance and reliability of these products, minimizing the risk of electric shock, fire, and mechanical hazards. Manufacturers can obtain certification by meeting the specified requirements and undergoing testing by recognized laboratories.