Reduction of Arc-Flash Hazards in Low Voltage Motor Control Assemblies

This paper introduces the concept of reducing the Arc-Flash hazard in low voltage motor control assemblies. The construction requirements and feature set will be identified and discussed. This is particularly important on use and maintenance of equipment in facilities. Arc-flash test procedures and results will be discussed. Testing includes the requirements to prevent an arc-flash hazard when using low voltage motor control assemblies. The test results will demonstrate the strengths of the new enhanced safety benefits and a marked reduction in Arc Flash levels. This results in improvements for low voltage motor control assemblies´ startup, operation, and maintenance procedures, including reduction in Personnel Protective Equipment (PPE). Future applications include developing improved low voltage motor control assembly diagnostic features for externally monitoring and analyzing motor current and voltage dynamics, plus providing a test position for safe access to allow for adjustment of the overload and breaker settings.