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

Considerations in Applying Arc-Resistant Low Voltage Motor Control Centers in Refining Environments

“…As long as the doors are closed, the PPE requirements are minimized." [4]. The establishment of an industry procedure for conducting internal arcing fault tests, as well as criteria for classifying the LVMCC as "arc resistant," would be one way in which a common level of protection behind a dead front could be defined.…”

“…If this activity must be performed while the section is energized, 2 maintaining a barrier (such as the door) between the stabs and the personnel will have some impact on the incident energy levels [4], if an arcing fault were to occur. However, unless an internal arcing test within the unit has been successfully performed, there is no guarantee that the door will remain closed under these conditions.…”

Considerations in applying arc resistant low voltage motor control centers in refining environments

“…If this activity must be performed while the section is energized 2 , maintaining a barrier (such as the door) between the stabs and personnel will have some impact on the incident energy levels [4], if an arcing fault were to occur. However, unless an internal arcing test within the unit has been successfully performed, there is no guarantee that the door will remain closed under these conditions.…”