Terms in Electrical Protection category referencing EN 62955
Standard or regulation
EN 62955
EN 62955 is the UK-relevant BS EN IEC standard for Residual Direct Current Detecting Devices used in Mode 3 EV charging equipment. It is commonly associated with 6 mA DC residual current detection and how EV chargers interact with upstream RCD protection.
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6 mA DC Leakage Detection
6 mA DC leakage detection identifies residual direct current at a level that may affect the operation of upstream RCDs. It is normally assessed during product selection, circuit design, installation verification and maintenance of EV charging equipment.
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RCD Type A
RCD Type A is a residual current device type designed to detect AC residual current and pulsating DC residual current. It is normally assessed during product selection, circuit design, installation verification and maintenance of EV charging equipment.
RCD Type B
RCD Type B is a residual current device type capable of detecting AC, pulsating DC and smooth DC residual currents. It is normally assessed during product selection, circuit design, installation verification and maintenance of EV charging equipment.
Residual Current Device (RCD)
A Residual Current Device (RCD) is a protective device that disconnects a circuit when it detects an imbalance between live conductors that may indicate earth leakage current. In EV charging, RCD selection must consider AC residual current, possible DC residual current and the protection already built into the charger.
Residual Current Protection
Residual current protection detects imbalance between live conductors and disconnects the supply when leakage current may indicate an electric shock risk. It is normally assessed during product selection, circuit design, installation verification and maintenance of EV charging equipment.
Residual Direct Current Detecting Device (RDC-DD)
A Residual Direct Current Detecting Device detects residual DC current in Mode 3 EV charging equipment. It is normally assessed during product selection, circuit design, installation verification and maintenance of EV charging equipment.