UL 60947-2:2020 is a technical standard that provides guidelines and specifications for low-voltage switchgear and control gear. It is intended to ensure the safety, performance, and reliability of electrical devices used in various applications.
Scope and Objectives
The scope of UL 60947-2:2020 covers low-voltage switchgear and control gear, which includes devices such as circuit-breakers, disconnectors, switches, contactors, motor starters, etc. The objective is to establish uniform requirements for these devices to enable their safe and efficient operation.
This standard applies to low-voltage equipment used in industrial, commercial, and residential settings. It addresses aspects such as temperature rise, electrical and mechanical durability, protection against electric shock, short-circuit withstand capability, and other performance parameters.
Main Requirements
UL 60947-2:2020 outlines several key requirements that manufacturers must adhere to when designing and manufacturing switchgear and control gear:
Mechanical endurance: The devices should be able to withstand a specified number of mechanical operations without any significant deterioration in their performance.
Electrical endurance: The devices should be capable of withstanding repeated electrical operations under defined conditions, without failure or excessive wear.
Temperature rise limits: The devices should not exceed specified temperature limits under normal operating conditions.
Short-circuit withstand capability: The devices should be capable of handling short-circuit currents without sustaining damage or causing hazards.
Protection against electric shock: The devices should incorporate adequate measures to protect users from electric shocks.
Compliance and Certification
Manufacturers need to ensure that their products comply with UL 60947-2:2020 before they can be marketed and sold. Compliance can be demonstrated through testing and evaluation carried out by recognized certification bodies.
Certification is typically achieved through the issuance of a UL mark, which serves as evidence that the product has met the relevant safety and performance requirements. It instills confidence in buyers and regulators about the reliability and compliance of the product.
In summary, UL 60947-2:2020 plays a crucial role in ensuring the safety and performance of low-voltage switchgear and control gear. By complying with this standard, manufacturers are able to provide reliable and safe electrical devices for various applications.
Nina She