What is UL 60947-4-2:2020?

UL 60947-4-2:2020 is an important technical standard in the field of electrical engineering. It specifically deals with circuit breakers, switches, and similar devices used in low-voltage control and protective systems. This standard provides requirements for the performance and testing of these devices, ensuring their safety and reliability in various applications.

The Scope and Objectives of UL 60947-4-2:2020

UL 60947-4-2:2020 covers a wide range of equipment, including circuit-breakers for overcurrent protection, disconnectors, switch disconnectors, fuse combination units, and more. The main objective of this standard is to establish uniform requirements for evaluating the behavior of these devices when subjected to specific operating conditions and stresses. It aims to ensure that they can safely interrupt or switch off currents under different fault conditions, providing optimal protection for electrical systems and preventing potential hazards.

Key Requirements and Testing Procedures

UL 60947-4-2:2020 specifies various performance requirements and testing procedures for circuit breakers and switches. These include verification of mechanical endurance, dielectric properties, temperature rise limits, and electrical ratings. The standard also addresses aspects such as short-circuit durability, tripping characteristics, and response times. Testing methodologies defined in this standard help manufacturers evaluate the performance of their devices and ensure compliance with the established requirements.

Applications and Benefits of UL 60947-4-2:2020

UL 60947-4-2:2020 is widely adopted in industries where low-voltage control and protective systems are employed. This includes industrial automation, manufacturing, power distribution, and many other sectors. Compliance with this standard not only ensures the safety of electrical systems but also enhances interoperability among different devices and manufacturers. By conforming to the requirements of UL 60947-4-2:2020, manufacturers can gain a competitive edge by offering reliable and high-quality circuit breakers and switches that meet industry standards and customer expectations.