News | company news | Aug 12,2026
The rapid growth of the electric vehicle market has significantly increased the demand for compact and reliable chargers. Among the various chargers available, the 3.3 kW portable charger is widely used thanks to its practical features, both for home charging and for emergency and everyday use.
However, modern electric vehicle chargers contain high-frequency power electronics components, such as AC/DC converters, switched-mode power supplies, and power modules. These components generate not only AC leakage currents but also a smoothed residual DC current that is not detected by conventional protection devices, which only detect AC current.
Reliable residual current detection modules are becoming a fundamental aspect of product safety design.
A suitable solution for detecting 6 mA leakage currents in the DC system helps portable electric vehicle chargers meet IEC safety requirements, while ensuring a compact size and good cost-effectiveness.
Within a portable electric vehicle charger, different types of leakage currents occur during the energy conversion process:
When a continuous leakage current occurs, a conventional Type A residual current device (RCD) can become saturated, thus reducing its ability to detect subsequent faults due to leakage current.
Therefore, AC/DC sensitive monitoring solutions are needed for electric vehicle chargers.
The residual current device (RCD) monitoring system works by continuously monitoring the leakage current between the electrical network and earth. If it detects an abnormal leakage current, the system can interrupt the power supply before risks such as electric shock or fire occur.
For electric vehicle charging systems in mode 2, and in particular for portable electric vehicle chargers, the IEC 62955 standard defines the requirements for residual current detection devices (RCD-PD).
RDC-PD solutions offer:
For manufacturers developing 3.3 kW portable chargers for electric vehicles, integrating a residual current monitoring module that complies with IEC 62955 can simplify the system architecture and improve charging safety.
The HYCA series residual current monitoring devices are designed for electric vehicle charging and comply with the requirements of IEC 62752 and IEC 62955 standards for RDC-PD.
Typical residual current monitoring modules include:
During the charging process of an electric vehicle:
Alternative electricity grid
↓
Portable charger for electric vehicles
↓
Residual current detection module
↓
control microcontroller
↓
Relay/automatic switch
↓
electric cars
If the abnormal leakage current exceeds the set limit, the monitoring unit sends a stop signal to the load controller to interrupt the power supply.
Provided by HYCA-07-PD:
This allows for easy integration into the control unit of an electric vehicle charger.
When developing small loaders, engineers typically focus on the following aspects:
The HYCA-07-PD device was developed for residual current monitoring and is used, among other things, for the following applications:
This module supports:
| volume | specification |
| Application | Charging stations for electric vehicles |
| Supply voltage | 5V DC |
| Install | PCB Assembly |
| Main flow zone | 32A-80A |
| Type of recognition | Residual current of alternating current and direct current. |
| self-diagnostic function | Accessible |
| Exit signal | Digital documents on tourism |
The device supports an effective current of 32A to 80A and is therefore suitable for various EV charging applications, both in the private and mobile sectors.
For manufacturers of electric vehicle charging systems wishing to enter the European and international market, certification options are an important factor when choosing component suppliers.
The HYCA B series residual current device has been tested and certified by TÜV Rheinland LGA Products Ltd.
The TÜV Rheinland certificate confirms that the product meets the following requirements:
Current sensor
(type B residual current monitoring unit)
And confirm that the test meets the following requirements:
The range of HYCA-certified products includes:
And the associated models.
For charger manufacturers, the use of TÜV-certified RDC-PD modules can help reduce technical risks during the product development and certification phases.
Conventional leak protection solutions may require the use of larger protective components.
The HYCA-07-PD component is designed to be integrated into printed circuit boards (PCBs) and helps engineers optimize charger size.
The leakage current of an electric vehicle charger can contain both alternating current (AC) and direct current (DC).
The HYCA-07-PD offers sensitive monitoring of residual AC/DC current to improve load safety.
For chargers that require critical safety measures, rigorous system testing is essential.
The HYCA-07-PD module supports self-diagnostics via a dedicated TEST input, allowing the charge controller to verify the module’s functionality before starting the charging process.
This module offers:
This allows for flexible communication with the charger’s microcontroller.
HYCA-07-PD can be used for:
Typical application areas:
HAS:
HAS:
Engineers must evaluate the following elements:
Check if the module is compatible with the following:
The verification module can detect the following:
plug:
Certified components can simplify approval processes in global markets.
With the continuous development of electric vehicle charging technology, the detection of 6mA DC leakage currents has become an important safety feature of portable electric vehicle chargers .
For manufacturers developing 3.3 kW mode 2 charging solutions, choosing RDC-PD modules that comply with IEC 62955 can improve safety and simplify system development.
The HYCA-07-PD has been tested according to IEC 62752/IEC 62955 standards and certified by TÜV Rheinland. It offers electric vehicle charging infrastructure engineers a reliable solution for monitoring residual current in next-generation chargers.
Compay：HEYI Electrical Co., Ltd.
Brand: HEYI/ASCT
Contact: Bethy
E-mail: heyi@heyiele.com
Tel: 86-13968747975
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