120511 vehicle charging

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120511 vehicle charging

  1. 1. Sharing our Guidance Overview of Electric Vehicle Charging May 11, 2012
  2. 2. Electric Vehicle Charging - Terminology EVSE: Electric Vehicle Supply Equipment BEV: Battery Electric Vehicle PHEV: Plug-in Hybrid Vehicle EV: Electric Vehicle Connector & Inlet: Coupler OVERVIEW OF ELECTRIC VEHICLE CHARGING
  3. 3. X OVERVIEW OF ELECTRIC VEHICLE CHARGING Level 1 Charging 120VAC, 15A, NEMA 5-15R Typical charge time: 12-18hrs Level 2 Charging 208-240VAC, up to 80A Typical charge time: 4-8hrs Level 3 Charging DC charging Typical charge time: 15-30 minutes Actual charge time can vary Example: Nissan Leaf 24kwh battery 100 mile range Level 1 = 20hrs Level 2 = 8hrs Level 3 = 30min (from NissanUSA web site) Electric Vehicle Charging Types
  4. 4. X OVERVIEW OF ELECTRIC VEHICLE CHARGING Electric Vehicle Charging Types Level 1 Charging Power Source 110V, 15A, 5-20R Max Charging Power Output Up to 1.65kw Speed 12-18hrs Installation Plug-in outlet Safety GFI, cable energized when charging Accessibility Everywhere Procurement Included w/car Level 2 Charging 208-240V, 40A, single phase, dedicated Up to 7.2kw (240v @ 30A) 4-8 hrs Electrician install outlet Household GFI breaker, cable energized when charging Dedicated equipment After market
  5. 5. X OVERVIEW OF ELECTRIC VEHICLE CHARGING Electric Vehicle Charging Types Level 3 Charging Current status of level 3 charging: Only Nissan, Mitsubishi, and smaller OEMs have a Level 3 port -Chevy and Ford can not be charged via a DC fast charger -Society of Automotive Engineers has not standardized on a plug You will not see American car companies adopt Level 3 charging until SAE develops the Level 3 plug Note on Level 3 charging: Nissan recommends that quick charging not be performed more than once a day.
  6. 6. X OVERVIEW OF ELECTRIC VEHICLE CHARGING Electric Vehicle Charging • Codes and Standards • NEC Article 625 • UL 2231 & UL 2594 • SAE J1772 • Also: NEMA, UL 2251, SAE J1718
  7. 7. X OVERVIEW OF ELECTRIC VEHICLE CHARGING Electric Vehicle Charging • Standard SAE J1772 • Coupler assembly – Connector – Inlet • Coupler pin configuration – AC Power (L1) – AC Power (L2) – Equipment Ground – Control Pilot – Proximity detection
  8. 8. X OVERVIEW OF ELECTRIC VEHICLE CHARGING Electric Vehicle Charging • UL 2231 & UL 2594 • 20ma ground fault (UL 2231) – Monitor the differential current among current carrying conductors in a grounded system – Monitor equipment ground continuity – Monitor the insulation that provides the electrical isolation from ground for an isolated circuit • Maximum cable length = 25” (UL 2594)
  9. 9. X OVERVIEW OF ELECTRIC VEHICLE CHARGING Electric Vehicle Charging • NEC 625 • De-energize event – De-energize cable if cable is uncoupled – De-energize cable if cable is under strain – De-energize cable if cable is primary source of power is lost – De-energize cable if cable is indoor ventilation is not available when required • Connector mount 18”-48” indoor – Above floor level • Connector mount 24”-48” outdoor – Above parking surface
  10. 10. X OVERVIEW OF ELECTRIC VEHICLE CHARGING Electric Vehicle Charging • NEC 625(cont) • Ventilation required for “listed or labeled” EVs • Hydrogen Outgassing – Lead-Acid – Nickel-Metal Hydride • Non-gassing – Lithium-Ion – Developing Technology • EVSE will detect if EV requires ventilation. EVSE will alarm and not energize EVs requiring ventilation, or EVSE will activate ventilation system.
  11. 11. X OVERVIEW OF ELECTRIC VEHICLE CHARGING Electric Vehicle Charging • NEC 625 (cont) • Charging loads shall be considered as continuous loads (NO exceptions). • Overcurrent protection must be sized for 125% of the continuous load current. No exception for 100% rated breakers. • Branch circuit calculations per NEC 220.10. • Feeder and service load calculations per NEC 220.40.
  12. 12. CONCLUSION . . . THANK YOU.

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