Terms beginning with R in Electrical Protection category referencing BS 7671
Standard or regulation
BS 7671
BS 7671 is the UK national standard for electrical installations, covering the design, erection, inspection, testing and verification of low-voltage electrical systems. Section 722 contains specific requirements for supplies to electric vehicles.
R
Rated Current
Rated current is the maximum current a charger or electrical component is designed to carry under specified conditions. It is normally assessed during product selection, circuit design, installation verification and maintenance of EV charging equipment.
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.
RCD Type F
RCD Type F is a residual current device type intended for certain single-phase circuits with frequency components, such as some equipment using variable-speed drives. It is normally assessed during product selection, circuit design, installation verification and maintenance of EV charging equipment.
Residual Current Breaker with Overcurrent (RCBO)
A Residual Current Breaker with Overcurrent combines residual current protection and overcurrent protection in one device. 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.