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Multi-Vehicle Energy Transfer Arc Flash Hazard Analysis

Company: Westinghouse Air Brake Technologies Corporation (aka Wabtec)

Major(s):
Primary: EE
Secondary: EGEE

Non-Disclosure Agreement: YES

Intellectual Property: NO

Overview: - Arc-Flash occurs when a short-circuit event has sufficient voltage and current to allow current to flow through ionized air. - Two points with voltage potential may be bridged temporarily by a conductor. That conductor could be a small piece of wire, a cable, or a tool, that is then either melted or blown away, forming an arc. - An Analysis must be performed for any component or cabinet where HV points are present that have sufficient current capability to result in an arc-flash. - Anytime a connection is made where a fault down-stream could result in an arc-flash the incident energy must be calculated. - Arc Flash Analysis is performed following NFPA 70E 2015 Annex D.5, using assumptions to be provided by Wabtec Problem Statement: - Determine the PPE, and Arc-Flash Working Boundary for battery electric vehicle external connections - Provides values to put on arc-flash hazard labels that are placed on the exterior of all cabs where Arc-Flash hazard may exist - Provide any further recommendations (fusing, additional isolation needs., etc) based on the analysis results