RCD (residual current device) is a safety production device used to check and prevent electrical leakage in EV chargers. Electrical be cut down to prevent accidents when RCD detects electricity abnormality.
The RCD mainly consists of the following components:
The triggering of RCD mainly depends on two important factors:
The nominal action value of RCDs:
All countries have strict safety requirements for EV charging equipment, such as:
RCD is an indispensable safety protection device in EV chargers, which can effectively prevent the risks of electric shock, fire and damage to electrical equipment. According to different EV charging scenarios, different RCD types (Type A, Type B or Type A + 6mA DC detection) should be chosen to ensure the compliance and safety of the charging pile.
As technology advances, smart RCDs and higher standard protection mechanisms will be gradually promoted to further enhance the safety and user experience of EV charging.
The UK Smart Charging Regulations set clear requirements for smart charging technology, interoperability, security and data monitoring, and set the direction of technology improvement and market development for the EV charging equipment industry.
DIN 70121 is an early CCS DC fast charging communication protocol that provides basic vehicle-charger communication but it has no advanced authentication and security cryptography.
OTA（Over-The-Air）, means it can remotely upgrade software by the wireless network. It has become an important menthol to improving EV charger performance and user’s experience.
