This part of IEC 61851, which is a Technical Specification, applies to the equipment, including stationary equipment

• for the conductive transfer of electric power between the supply network and

– an electric road vehicle, or

– a removable rechargeable energy storage system (RESS), or

– an on-board RESS of an electric road vehicle,

• when the equipment is connected to the supply network having a supply voltage up to 480 V AC or up to 400 V DC and a rated output voltage up to 120 V DC, and

• where the protection against electric shock relies on double or reinforced insulation, and with double or reinforced insulation between all AC and DC inputs and outputs.

NOTE 1 In the following countries, the acceptable nominal supply voltage is up to 600 V AC: CA, US.

Particular requirements for portable and mobile DRI EV supply equipment are covered by IEC TS 61851-3-2023.

Equipment for the conductive transfer of electric power between the supply network and an electric road vehicle/RESS according to the IEC TS 61851-3 series is intended to be connected to vehicles where the vehicle power supply circuit is protected against electric shock by double or reinforced insulation.

NOTE 2 For information regarding protection against electric shock by double or reinforced insulation of the EV or of the vehicle power supply circuit, see ISO 18246:2023, 6.1.1 b) and Table 3.

Requirements for bidirectional energy transfer DC to AC are under consideration and are not part of this document.

This document also applies to EV supply equipment supplied from on-site storage systems (e.g. buffer batteries).

This document applies to VCUs intended to be a part of DRI EV supply equipment specified in this document.

This document applies to equipment for the conductive transfer of electric power between the supply network and an electric road vehicle/RESS intended to be installed and/or used at an altitude of up to 2 000 m.

The aspects covered in this document include

• the connection to the vehicle,

• characteristics to be complied with by the vehicle with respect to the AC or DC,

• the specification for required level of electrical safety for the double or reinforced insulated (DRI) EV supply equipment,

• operators and third-party electrical safety,

• requirements for command and control communication for safety and process matters, if required,

• requirements for bidirectional power transfer DC to DC, and

• the connection to installations according to IEC 60364-7-722.

NOTE 3 In the following countries, electrical installation codes other than those from IEC 60364-7-722 are used: CA, US.

Equipment covered by this document is not intended to be located in hazardous areas where flammable gas or vapour and/or combustible materials, fuels or other combustible or explosive materials are present. Additional requirements can apply to these locations.

This document does not apply to

• aspects related to maintenance,

• electrical devices and components, which are covered by their specific product standards,

• trolley buses and rail vehicles,

• vehicle power supply circuit, which is covered by ISO 18246, and

• EMC requirements for on-board equipment while connected to the supply, which are covered by IEC 61851-21-1.