ISO 17409-2020 PDF

Full title and description

Electrically propelled road vehicles — Conductive power transfer — Safety requirements. This International Standard specifies electrical safety requirements for conductive connections between electrically propelled road vehicles and external electric circuits (power supplies and external loads).

Abstract

This document provides requirements for on-board sections of vehicle power-supply circuits for conductive charging, including requirements covering charging modes 2, 3 and 4, and reverse power transfer. It addresses connection to isolated DC EV charging stations (mode 4 per IEC 61851-23) and notes that mode 1 is not covered. The standard excludes comprehensive safety information for manufacturing, maintenance and repair personnel.

General information

• Status: Withdrawn.
• Publication date: 2020-02 (Edition 2, 2020).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 43.120 (Road vehicles — electrical safety / conductive power transfer).
• Edition / version: Edition 2 (2020).
• Number of pages: 41 pages (ISO bibliographic record).

Scope

Applies to the on-board sections of vehicle power supply circuits and to dedicated power-supply control functions used for the connection of electrically propelled road vehicles to external electric circuits. It sets out electrical safety requirements for conductive charging modes 2, 3 and 4 and for reverse power transfer; mode 1 is explicitly not covered. External electric circuits themselves are outside the scope of this vehicle-focused document.

Key topics and requirements

• Electric safety requirements for conductive vehicle-to-external-circuit connections (on-board sections and dedicated control functions).
• Requirements addressing charging modes 2, 3 and 4 (as defined in IEC 61851-1) and reverse power transfer.
• Specific provisions for connection to isolated DC EV charging stations (mode 4) in accordance with IEC 61851-23.
• Clarification that mode 1 charging is not addressed by this edition.
• Removal of the previous limitation on y-capacitance as a protective provision for conductive DC connections (i.e., change in fault-protection provisions compared with earlier editions).
• Does not provide comprehensive safety guidance for manufacturing, maintenance or repair personnel; cross-reference to general electrical safety standard ISO 6469-3 for broader vehicle electrical safety.

Typical use and users

Used by electrically propelled vehicle manufacturers (OEMs), on-board charger and connector designers, charging-station manufacturers and system integrators, conformity assessment and test laboratories, certification bodies and safety/regulatory authorities to design, assess and certify electrical safety of vehicle-side conductive charging equipment and control functions. Also used as a technical reference in standards development and regulatory alignment.

Related standards

Closely related to and referencing IEC 61851-1 (definitions and charging modes) and IEC 61851-23 (isolation and DC charging station connections), and cross-references ISO 6469-3 for general electrical safety of electrically propelled road vehicles. This ISO deliverable has also been published/adopted in regional collections (for example as EN/DIN/BS versions of EN ISO 17409:2020).

Keywords

conductive charging, electric vehicles, EV, conductive power transfer, charging modes 2/3/4, reverse power transfer, on-board charger, connector safety, IEC 61851, ISO 6469, electrical safety.

FAQ

Q: What is this standard?

A: ISO 17409:2020 is an International Standard that defines electrical safety requirements for conductive connections between electrically propelled road vehicles and external electric circuits (charging power supplies and external loads).

Q: What does it cover?

A: It covers on-board vehicle power-supply circuit requirements for conductive charging modes 2, 3 and 4, reverse power transfer, and specific requirements for connection to isolated DC EV charging stations; it does not cover mode 1 and does not provide comprehensive guidance for manufacturing or maintenance personnel.

Q: Who typically uses it?

A: Vehicle OEMs, on-board charging and connector designers, charging-station manufacturers, test and certification laboratories, regulators and standards developers use it to ensure safe conductive power-transfer connections between vehicles and external circuits.

Q: Is it current or superseded?

A: The ISO bibliographic record currently shows the 2020 edition as Withdrawn; consult national/regional standards bodies or ISO store records for the precise withdrawal/replacement history and any successor publications.

Q: Is it part of a series?

A: It is part of the family of standards addressing electrically propelled road vehicle safety and charging—related standards include ISO 6469 (electrical safety of EVs) and IEC 61851 series (charging systems and modes), which are referenced within this document.

Q: What are the key keywords?

A: conductive charging, EV charging modes, reverse power transfer, on-board power circuits, connector safety, IEC 61851, ISO 6469.