SAME Energy & Sustainability IGE Webinar: EV Charging Considerations for Power System Studies

About This Webinar

Power system studies generally focus on power distribution equipment and often do not consider individual building loads. As electrical vehicle (EV) charging becomes more common, a Short Circuit, Coordination and Arc Flash Analysis may need to consider EV equipment in order to evaluate short circuit ratings of equipment, size new and existing circuit breaker protection, and quantify electrical and arc flash hazards. The following topics will be discussed in this presentation, including an overview of the type of analysis and how it applies to EV infrastructure:

• Short Circuit Analysis: Review calculation of fault currents at EV equipment and discuss typical EV charger ratings.

• Protective Device Coordination: Review selection of circuit breakers and fuses at upstream distribution equipment, and how to coordinate existing circuit protection with EV charging devices to ensure proper operation during a fault condition.

• Arc Flash Analysis: Review the safety hazards associated with energized work at EV equipment and calculation of arc flash incident energy exposure at EV charging points.

• Load Flow: Considerations for upstream transformer and equipment sizing based on quantity and size of EV equipment.

Featured Presenters

Adam Reeves, P.E.

Federal Application Engineer

Adam Reeves is an Application Engineer with Eaton’s Electrical Engineering Services and Systems Division with experience with power distribution products and engineering for commercial and industrial facilities in both the public and private sectors. He has expertise in power system analysis studies and has authored multiple IEEE papers relating to arc flash hazard analysis. Adam earned an MBA and Bachelor of Science in Electrical Engineering degrees from the University of Maryland and is a registered Professional Engineer in the State of Maryland.

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Elizabeth J. Bradford

National Resilience & Sustainability Lead

As the Vice President, National Resilience Lead for Michael Baker International, Elizabeth supports Michael Baker’s integrated sustainability and resilience services across all sectors, markets, disciplines, geographies and project life cycles – both as part of the company’s infrastructure, environmental, community and Federal projects, as well as stand-alone or complementary services. She brings nearly 30 years of industry experience across a broad range of sectors and services, to inform the development of the implementation frameworks and tools that translate sustainability and resilience strategy into individual ownership and action throughout an organization. She has been recognized with the 2017 Environmental Business Journal's Industry Leadership Award for her work developing the Resiliency and Sustainability Framework, and the 2019 City & State New York Responsible 100 Infrastructure Award.

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