Terms beginning with T in Power Supply Topology 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.
T
Three-Phase Charging
Three-phase charging uses a three-phase AC supply and can support higher AC charging rates where the vehicle and charger are compatible. It is normally assessed alongside phase availability, circuit capacity, protective devices, cable sizing and DNO/site constraints.
TN-C-S Earthing
TN-C-S earthing is an arrangement where neutral and protective functions are combined in part of the supply and separated within the installation. It is normally assessed during product selection, circuit design, installation verification and maintenance of EV charging equipment.
TN-S Earthing
TN-S earthing is an arrangement where the neutral and protective earth conductors remain separate from the supply source to the installation. It is normally assessed during product selection, circuit design, installation verification and maintenance of EV charging equipment.
TT Earthing
TT earthing is an arrangement where the installation uses its own earth electrode rather than relying on the distributor's protective conductor. It is normally assessed during product selection, circuit design, installation verification and maintenance of EV charging equipment.