What is UL 60947-5-2:2020?

UL 60947-5-2 refers to the latest edition of a technical standard developed by Underwriters Laboratories (UL), which provides guidelines and requirements for circuit-breakers and other control devices. This standard focuses on safety aspects and performance characteristics of equipment used in low-voltage power distribution systems.

Importance of UL 60947-5-2

UL 60947-5-2 is crucial in ensuring electrical safety in various industries and applications. It sets forth specific requirements that aim to prevent hazards such as electrical shocks, fires, or explosions caused by faulty or inadequate control devices. Adhering to this standard helps manufacturers produce reliable and safe equipment while providing end-users with confidence in their operational efficiency.

Key Features and Requirements

This updated edition of UL 60947-5-2 introduces several key features and requirements:

Circuit-breaker Performance: The standard specifies criteria for circuit-breakers to ensure their ability to handle short-circuits, overloads, and fault conditions effectively. Manufacturers are required to test their products according to these criteria.

Electrical Ratings and Characteristics: UL 60947-5-2 defines parameters such as rated voltage, current, frequency, and short-circuit ratings. These ratings help users select suitable devices that can safely operate within their specific application's electrical parameters.

Product Markings and Documentation: The standard outlines requirements for labels, markings, and documentation provided with control devices. These include essential information like manufacturer details, model numbers, intended use, and installation instructions, assisting users in proper device selection and installation.

Environmental Considerations: UL 60947-5-2 addresses aspects such as temperature, humidity, and chemical resistance, ensuring control devices can withstand harsh environments without degradation of safety or performance.

Conclusion

UL 60947-5-2 plays an indispensable role in promoting electrical safety through its comprehensive guidelines and requirements. Compliance with this standard helps safeguard people, property, and equipment from potential hazards caused by faulty control devices. By incorporating the latest edition of UL 60947-5-2 into their designs, manufacturers and users alike demonstrate a commitment to quality, reliability, and safety in low-voltage power distribution systems.