EV 충전기 – 코본테크

Applications

EV Charger

Why Is EV Charging
Safety Monitoring Important?

EV charging systems require continuous residual current monitoring to ensure user safety and the reliability of charging equipment. COBON TECH’s RCM (Residual Current Monitoring Module) provides the RDC-DD function to monitor AC and DC leakage currents in accordance with the requirements of IEC 62955, IEC 62752, and UL 2231-2, reducing the risk of electric shock and fire and supporting the implementation of safe EV charging systems.

Prevention of the Blind Effect in Type A RCDs

During EV charging, smooth DC leakage current may occur. If the DC leakage current reaches 6 mA or higher, a conventional Type A RCD may become saturated, causing a Blind Effect that prevents it from properly detecting AC leakage current. COBON TECH's RCM quickly detects such DC leakage current, helping ensure that the protective function of the Type A RCD is maintained properly.

Implementation of a Cost-Effective Protection System

EV charging systems generally meet international safety requirements in the following two ways.
By applying an RDC-DD, a Type A RCD can be used, enabling an efficient system configuration in terms of cost and installation space.

RDC-DD + Type A RCCB/RCBO
Type B RCCB/RCBO

Differences Between RDC-DD and RCD in EV Charging Systems

Category	RDC-DD	RCD (RCCB / RCBO)
Definition	Device that detects smooth DC leakage current	Protective device that disconnects the power when leakage current occurs
Main Function	Detection of smooth DC leakage current of 6 mA or higher	Detects leakage current and disconnects the circuit
Detection Target	Smooth DC leakage current	Type A: AC and pulsating DC Type B: AC, pulsating DC, and smooth DC
Installation Location	Inside the EV charger	Inside the distribution board or EV charger (depending on system configuration)
Main Role	Prevention of the Blind Effect in Type A RCDs	Power disconnection to prevent electric shock and fire

Prevention of Electric Shock Accidents

If leakage current occurs due to cable damage, insulation deterioration, moisture, or other causes, it is quickly detected, allowing the charging system to shut off the power and thereby reducing the risk of electric shock.

Compliance with International Safety Standards

The international standards IEC 62955 (Mode 3 Wallbox) and IEC 62752 (Mode 2 IC-CPD) require the detection of 6 mA smooth DC leakage current in EV charging systems. These requirements are important protection criteria for ensuring the safety of users and equipment.

Comparison of EV Charging Methods

[ Mode 2 vs Mode 3 ]

Category	Mode 2 (IC-CPD)	Mode 3 (Wallbox / AC Charging Station)
Charging Method	Charging by connecting a portable charging cable (IC-CPD) to a standard power outlet	Charging through a dedicated AC charger (Wallbox or charging station)
Installation Type	Portable and movable	Fixed installation
Usage Location	Homes, travel destinations, and temporary charging environments	Homes, apartments, workplaces, and public charging stations
Convenience	Portable and available for use anytime	Convenient to use as it is permanently installed
Charging Performance	Generally lower charging power	Higher charging power and stable charging support
Applicable Standard	IEC 62752	IEC 62955

Destruction Procedure	After the purpose has been fulfilled, the information provided by the user is transferred to a separate database (or stored in a separate filing cabinet in the case of paper documents), retained for a certain period in accordance with internal policies and applicable laws and regulations for information protection purposes (see Retention and Use Period), and then destroyed. Such personal information will not be used for any purpose other than the purpose for which it is retained, unless otherwise required by law.
Destruction Method	After the purpose has been fulfilled, the information provided by the user is transferred to a separate database (or stored in a separate filing cabinet in the case of paper documents), retained for a certain period in accordance with internal policies and applicable laws and regulations for information protection purposes (see Retention and Use Period), and then destroyed. Such personal information will not be used for any purpose other than the purpose for which it is retained, unless otherwise required by law. Personal information printed on paper is destroyed by shredding or incineration. Personal information stored in electronic file format is deleted using technical methods that prevent the data from being recovered.
Duty to Notify	If any additions, deletions, or revisions are made to this Privacy Policy, notice will be provided through the "Notices" section of the website at least 7 days before the changes take effect.

Destruction Procedure	After the purpose has been fulfilled, the information provided by the user is transferred to a separate database (or stored in a separate filing cabinet in the case of paper documents), retained for a certain period in accordance with internal policies and applicable laws and regulations for information protection purposes (see Retention and Use Period), and then destroyed. Such personal information will not be used for any purpose other than the purpose for which it is retained, unless otherwise required by law.
Destruction Method	After the purpose has been fulfilled, the information provided by the user is transferred to a separate database (or stored in a separate filing cabinet in the case of paper documents), retained for a certain period in accordance with internal policies and applicable laws and regulations for information protection purposes (see Retention and Use Period), and then destroyed. Such personal information will not be used for any purpose other than the purpose for which it is retained, unless otherwise required by law. Personal information printed on paper is destroyed by shredding or incineration. Personal information stored in electronic file format is deleted using technical methods that prevent the data from being recovered.
Duty to Notify	If any additions, deletions, or revisions are made to this Privacy Policy, notice will be provided through the "Notices" section of the website at least 7 days before the changes take effect.

Personal Information Collected

Methods of Collecting Personal Information

Purpose of Collecting and Using Personal Information

Retention and Use Period of Personal Information

Procedures and Methods for Destroying Personal Information

Personal Information Collected

Methods of Collecting Personal Information

Purpose of Collecting and Using Personal Information

Retention and Use Period of Personal Information

Procedures and Methods for Destroying Personal Information