IEC PAS 61851-1-1:2023

Electric vehicle conductive charging system - Part 1-1: Specific requirements for electric vehicle conductive charging system using type 4 vehicle coupler

IEC PAS 61851-1-1:2023 applies to a new type of AC EV supply equipment for charging electric road vehicles, with a rated supply voltage up to 1 000 V AC and a rated output voltage up to 1 000 V AC.
This document provides specific requirements for AC charging system using type 4 vehicle coupler.
Type 4 vehicle coupler is under consideration by SC23H.
Vehicle inlet and vehicle connector of type 4 are intended to be used for charging in modes 2 and 3, case C.
This document is to be read in conjunction with IEC 61851-1:2017.

General Information

• Status: Published
• Publication Date: 08-Feb-2023
• ICS: 43.120 - Electric road vehicles
• Technical Committee: TC 69 - Electrical power/energy transfer systems for electrically propelled road vehicles and industrial trucks
• Current Stage: PPUB - Publication issued
• Start Date: 09-Feb-2023
• Completion Date: 16-Jan-2023

Overview

IEC PAS 61851-1-1:2023 - Electric vehicle conductive charging system, Part 1-1 - defines specific requirements for AC EV supply equipment using the type 4 vehicle coupler. Intended to be read alongside IEC 61851-1:2017, this Publicly Available Specification covers AC charging systems with rated supply and output voltages up to 1 000 V AC and addresses charging in Mode 2 and Mode 3, case C. The PAS documents control, safety and interface requirements for a Chinese-origin AC connector architecture that is widely deployed in China and other markets.

Key topics and technical requirements

• Conductive electrical interface: Functional description of the basic interface adapted for type 4 couplers, including proximity contact (PP, also called CC in some countries).
• Control pilot: Normative guidance on the control pilot function using a PWM signal and a dedicated pilot conductor (Annex A), including provisions specific to simplified control pilot circuits.
• Proximity detection & cable current coding: Normative circuits and examples for proximity switching and resistor-based current coding on the proximity circuit (Annex B). The PAS includes component examples for coding different cable current capabilities used with type 4 systems.
• Construction, protection & testing: Applies the constructional, overload/short‑circuit protection, automatic reclosing and marking requirements of IEC 61851-1:2017, with additions and clarifications where applicable.
• Mode and country notes: Nationally noted limits (e.g., in CN the rated EVSE output current is limited to 32 A single-phase and 63 A three-phase; simplified pilot circuits limited to single-phase charging not exceeding 8 A in CN).

Practical applications

• Standardizes the interface and safety behavior for EV supply equipment (EVSE), vehicle inlets and connectors that use the type 4 vehicle coupler for AC conductive charging.
• Useful for manufacturers of EVSE, vehicle connector suppliers, cable-assembly producers, test laboratories and safety assessors to ensure compatibility and safe operation across vehicle and charging equipment.
• Helps integrators and infrastructure planners deploying charging stations in regions using the Chinese AC charging ecosystem to align equipment with IEC practice.

Who should use this standard

• EVSE designers and manufacturers
• Automotive OEM electrical teams (inlet/connector integration)
• Cable and accessory manufacturers (proximity and coding circuits)
• Certification bodies and test labs working on EV charging conformity
• Charging network operators and infrastructure specifiers

Related standards

• IEC 61851-1:2017 (conductive charging general requirements) - this PAS supplements and modifies clauses of IEC 61851-1.
• IEC 62196 series (plugs, socket‑outlets, vehicle connectors) - type 4 is under consideration within IEC 62196‑2 work.

Keywords: IEC PAS 61851-1-1:2023, type 4 vehicle coupler, electric vehicle conductive charging system, EV supply equipment, control pilot, proximity detection, cable current coding, Mode 3 case C.

Standards Content (Sample)

IEC PAS 61851-1-1 ®
Edition 1.0 2023-02
PUBLICLY AVAILABLE
SPECIFICATION
Electric vehicle conductive charging system –
Part 1-1: Specific requirements for electric vehicle conductive charging system
using type 4 vehicle coupler
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IEC PAS 61851-1-1 ®
Edition 1.0 2023-02
PUBLICLY AVAILABLE
SPECIFICATION
Electric vehicle conductive charging system –

Part 1-1: Specific requirements for electric vehicle conductive charging system

using type 4 vehicle coupler
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 43.120 ISBN 978-2-8322-6227-6

– 2 – IEC PAS 61851-1-1:2023 © IEC 2023
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General requirements . 6
5 Classification . 6
6 Charging modes and functions . 6
7 Communications . 7
8 Protection against electric shock . 7
9 Conductive electrical interface requirements . 7
10 Requirements for adaptors . 7
11 Cable assembly requirements . 7
12 EV supply equipment constructional requirements and tests . 7
13 Overload and short-circuit protection . 7
14 Automatic reclosing of protective devices . 7
15 Emergency switching or disconnect (optional) . 7
16 Marking and instructions . 7
Annex A (normative) Control pilot function through a control pilot circuit using a PWM
signal and a control pilot wire . 8
Annex B (normative) Proximity detection and cable current coding circuits for the
basic interface . 9
Annex C (informative) Examples of circuit diagrams for a basic and universal vehicle
couplers . 11
Bibliography . 13

Figure B.3 – Equivalent circuit diagram for vehicle couplers using an auxiliary switch
and current coding resistor . 9
Figure C.7 – Example of Mode 3 case C using proximity switch and resistor coding . 12

Table B.3 – Component value proximity circuit with current coding . 10

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC VEHICLE CONDUCTIVE CHARGING SYSTEM –

Part 1-1: Specific requirements for electric vehicle
conductive charging system using type 4 vehicle coupler

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