Page 348 - Electrician - TT (Volume 2)

ELECTRICIAN - CITS

EV Charging standards

A Charging stations provide connectors that conform to a variety of international standards. DC charging stations
are commonly equipped with multiple connectors to be able to charge a wide variety of vehicles that utilize
competing standards.

Public charging stations are typically found street-side or at retail shopping centers, government facilities, and
other parking areas. Private charging stations are typically found at residences, workplaces, and hotels.
Standards

Multiple standards have been established for charging technology to enable interoperability across vendors.
Standards are available for nomenclature, power, and connectors. Notably, Tesla has developed proprietary
technology in these areas, and built its charging networking starting in 2012.
Nomenclature

Charging station and vehicle terminology. In 2011,the European Automobile Manufacturers Association (ACEA)
defined the following terms:

• Socket outlet: the port on the electric vehicle supply equipment (EVSE) that supplies charging power to the
vehicle
• Plug: the end of the flexible cable that interfaces with the socket outlet on the EVSE. In North America, the
socket outlet and plug are not used because the cable is permanently attached.
• Cable: a flexible bundle of conductors that connects the EVSE with the electric vehicle
• Connector: the end of the flexible cable that interfaces with the vehicle inlet
• Vehicle inlet: the port on the electric vehicle that receives charging power

The terms “electric vehicle connector” and “electric vehicle inlet” were previously defined in the same way under
Article 625 of the United States National Electric Code (NEC) of 1999. NEC-1999 also defined the term “electric
vehicle supply equipment” as the entire unit “installed specifically for the purpose of delivering energy from the
premises wiring to the electric vehicle”, including “conductors ... electric vehicle connectors, attachment plugs,
and all other fittings, devices, power outlets, or apparatuses”.
Tesla, Inc uses the term charging station as the location of a group of chargers, and the term connector for an
individual EVSE
Voltage and power

Early standards
NEC(1999) levels

Method Maximum supply
Current (A) Voltage (V) Power (kW)
Level 1 (1-phasea AC) 12 120 1.44
16 120 1.92
24 120 2.88

Level 2 (1-phase AC) 32 208/240 7.68
Level 3 (3-phase AC) 400 480 332.6

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CITS : Power - Electrician & Wireman - Lesson 25 CITS : Power - Electrician & Wireman - Lesson 25