B Type RCD Protection for EV Charging
With the explosive growth in the number of new energy vehicles in recent years, the construction scale of supporting facilities and charging piles has also continued to expand. The growth of the new energy vehicle market is inseparable from the construction of basic charging facilities. How to ensure the safety of electricity during the charging process, especially to prevent leakage current from harming life and property, is an issue worthy of attention. Leakage current sensors, also known as residual current protectors, are widely used in low-voltage distribution systems to prevent electric shock accidents, leakage damage to electrical equipment and electrical fires. Also in the field of electric vehicle charging, RCD is also widely used as a basic electrical protection device.
IVY A/B type leakage current sensors can be used for electric vehicle charging protection. Leakage current sensors, also known as residual current sensors or differential current sensors, are electronic components that measure the sum of the currents in the phase and neutral circuits and detect any imbalance. In electric vehicle charging, leakage current sensors rated at 6mA DC play a vital role in ensuring the safety of the charging process. Smooth DC residual currents generated by OBC insulation faults may impair the proper functioning of Type A 30 mA RCDs installed upstream of or within an AC EV charging station. In the worst case scenario, a Type A RCD will fail to trip in the event of an electrical accident.
According to the type of residual current, RCD can be divided into AC type, A type, and B type. Type A residual current protector: Contains AC type characteristics, superimposes 6mA pulsating DC residual current with pulsating DC residual current, smoothes the residual current, and ensures RCD tripping. Type B residual current protector: In addition to the type A protection function, it can also superimpose sinusoidal AC residual current of 1000Hz and below, AC residual current superimposed with smooth DC residual current, pulsating DC residual current superimposed with smooth residual current, and two-phase or more rectification circuits. The generated pulsating DC residual current and smooth DC residual current ensure RCD tripping.
In the foreseeable future, as new energy vehicles enter thousands of households, charging piles will become an indispensable part of people's lives. Therefore, it is very necessary to replace the residual current protector in the charging pile. Only a safe power environment can allow everyone to enjoy the convenience brought by new energy vehicles.
The IVY Metering RCD module integrates type B leakage protection, providing a cost-effective type B leakage solution for the upgrade of RCD technology from traditional AC type/A type to type B, and providing better protection for the safety of charging equipment.
