PROJECT TITLE :
The Effects of System Grounding, Bus Insulation, and Probability On Arc Flash Hazard Reduction
This paper provides a follow-up to the paper The effects of System Grounding, Bus Insulation and Probability on Arc Flash Hazard Reduction—The Missing Links. In that paper, system grounding and bus insulation were thought-about a suggests that of reducing the likelihood of an arc flash incident by approximately two orders of magnitude. In September 2013, extra testing was conducted on a coffee-voltage motor control center (LVMCC) with the expectation that engineering enhancements like insulated vertical bus, high resistance grounding, and other techniques could be implemented to further cut back the chance of an arc flash incident. The testing performed was with faults initiated in locations usually found in operating petrochemical facilities, in LVMCCs, with the starter unit door open. This paper discusses the findings of testing on real-world electrical equipment in an effort to any perceive and minimize the chance of an arc flash incident. This paper reviews the physics of the arcing fault and how ignition wire, geometry, and the amount of anode/cathode pairs all contribute to arcing fault energy and personnel exposure.
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