IEC 62752:2016

Overview

IEC 62752:2016 is an international standard published by the International Electrotechnical Commission (IEC) that defines requirements for in-cable control and protection devices (IC-CPDs) used in mode 2 charging of electric road vehicles. Often referenced as IC-CPDs, these devices integrate safety and control functions within the charging cable itself to ensure safe charging operations.

The standard applies specifically to portable IC-CPDs which perform residual current detection and comparison, and they are designed to open the circuit if the residual current exceeds a predefined operating value. This protection is critical to safeguard users and prevent electrical accidents during electric vehicle (EV) charging.

The 2019 corrigendum is incorporated, making this the consolidated 1.1 edition from September 2018.

Key Topics

Scope and Functionality

• Applies to in-cable control and protection devices used exclusively for mode 2 charging of electric road vehicles.
• Defines functions such as detection of residual current and automatic circuit interruption in case thresholds are exceeded.
• Ensures devices meet both control and safety performance criteria.

Classification

• According to power supply type: single-phase, two-phase, three-phase, with or without neutral.
• Cemented on construction: units with integrated function boxes, modular designs, or separated components.
• By installation and use case: portable devices, wall-mounted, or combined.
• Differentiates by protective conductor path behavior and verification capabilities.

Technical Characteristics

• Rated operational voltages and currents for IC-CPDs.
• Residual operating current and residual non-operating current specifications.
• Insulation coordination, creepage distances, and clearances in design to ensure safety and durability.
• Breaking capacities for electrical connections.
• Requirements for mechanical and electrical construction, including cable terminations and enclosures.

Safety and Testing

• Comprehensive rules on control between the EV and IC-CPD.
• Defining testing methodologies for verifying electrical performance and mechanical robustness.
• Ensures IC-CPDs provide strong protection against electric shock hazards during charging.

Applications

IEC 62752-compliant IC-CPDs are essential components in mode 2 charging systems, where charging is conducted via household sockets or portable supply points. Typical use cases include:

• Residential EV charging: Portable charging cables equipped with IC-CPDs protect home users.
• Public or semi-public charging points: IC-CPDs help maintain safety in various environments where EVs recharge.
• Electrification of fleets and commercial vehicles: Ensuring safe charging with portable and wall-mounted IC-CPD solutions.
• Retrofit EV charging setups: Where existing power infrastructure needs added safety controls integrated into charging cables.

The standard's requirements support widespread and safe adoption of electric vehicle technology by addressing safety issues associated with varying power supplies and common residential conditions.

Related Standards

Several related standards complement IEC 62752 for a complete EV charging infrastructure safety framework:

• IEC 61851 series – Covers general EV conductive charging systems and modes (including mode 3 and 4).
• IEC 62955 – Addresses residual current monitoring devices for mode 3 charging systems.
• IEC 60364 series – Electrical installation standards focusing on safety and protection against electric shock.
• ISO 15118 – International standard for vehicle-to-grid communication, relevant for advanced charging control beyond mode 2.
• Regional standards and regulations for electrical safety and EV charging interoperability.

Summary

IEC 62752:2016 establishes rigorous international standards for in-cable control and protection devices used in mode 2 charging of electric vehicles. By setting clear safety, construction, and operational criteria, it enables manufacturers to produce reliable IC-CPDs that ensure user protection against residual current faults during charging. Its practical framework supports safe EV charging in residential and other low-power applications, accelerating the safe global adoption of electric mobility solutions.