IEC 62955 Defines RDC-DD 6mA DC
IEC 62955:2018 Residual DC Current Monitoring Devices (RDC-DD), hereinafter referred to as RDC-MD (Residual DC Current Monitoring Device) or RDC-PD (Residual DC Current Protective Device) for permanently connected AC electric vehicle charging stations (EV charging mode 3 according to IEC 61851-1 and IEC 60364-7-722)
TÜV certification for IEC 62955:2018
It sets rules for RDC-DD to ensure that type A or type F RCDs function properly even with DC currents exceeding 6 mA. If the RDC-DD detects a steady DC current of 6 mA or more, it is designed to shut down the power supply to the electric vehicle. It can indicate a potential problem or safety risk, which is essential to protect people using and interacting with electric vehicles.
In charging stations, the RCD protection is integrated into the EV charger and is part of the product composition. Charging stations should be installed with an external RCD type A in a fixed installation. The charging station contains a DC residual current detection device (RDC-DD) in accordance with IEC 62955. Disconnection in the event of a DC fault current exceeding 6 mA is ensured by a common switch, which cuts off the control current of all internal relays so that they open simultaneously.
RDC-DD (Residual DC Current Detection Device) are safety devices used to protect against electrical hazards. They monitor the current and can quickly disconnect the power supply if a leakage of a 6 mA DC residual current is detected, which could occur due to a fault or if someone came into contact with live electrical parts. This means that our products are officially approved by the renowned testing institute TÜV, ensuring that the RDC-DD components within them meet all key technical and safety standards.
