What is UL 60947-5-8:2020?

UL 60947-5-8:2020 is a professional technical standard that defines the specifications and testing procedures for low-voltage switchgear and controlgear equipment. It is important in ensuring the safety, reliability, and performance of electrical equipment used in various industrial applications.

The Purpose of UL 60947-5-8:2020

UL 60947-5-8:2020 sets requirements for electrically operated contactors and motor-starters. The standard specifies their construction, ratings, and performance characteristics based on their intended use. It provides guidance for manufacturers, engineers, and installers to ensure the proper selection, installation, and operation of these devices.

Key Requirements of UL 60947-5-8:2020

The standard covers several important aspects of contactors and motor-starters, including their mechanical endurance, electrical endurance, and terminal capacity. Mechanical endurance refers to the ability of these devices to withstand repeated operations without failure, while electrical endurance pertains to their functionality under different electrical loads.

In addition to endurance, UL 60947-5-8:2020 also establishes criteria for temperature rise, short-circuit withstand strength, and dielectric properties. These requirements are crucial in guaranteeing the safe and reliable functioning of the equipment in a wide range of operating conditions and scenarios.

An of Testing Procedures

To assess compliance with UL 60947-5-8:2020, rigorous testing procedures are employed. These tests evaluate the operational and safety characteristics of contactors and motor-starters. Some of the tests specified in the standard include temperature rise, short-circuit withstand, abnormal operation, and dielectric withstand.

During temperature rise tests, the devices are subjected to various loads and their temperature rise is measured to ensure it is within safe limits. Short-circuit withstand tests determine the devices' ability to handle high currents without damage or significant performance degradation. Dielectric withstand tests assess the insulation properties of the equipment under high voltage conditions to prevent electrical hazards.

In conclusion, UL 60947-5-8:2020 is an essential technical standard that ensures the safety and reliability of low-voltage switchgear and controlgear equipment used in diverse industrial applications. By adhering to the requirements and testing procedures outlined in this standard, manufacturers can produce high-quality devices that meet the needs of end-users while maintaining utmost safety standards.