Monitor_1_2018_en

| MONITOR | 1/2016 57 1/2018 | MONITOR | Charging mode 1: Connection of the electric vehicle to the AC mains power supply using standard socket outlets on the mains side and line conductors, neutral conductors and protective conductors. Here, the charging current must not exceed 16 A and 250 V for singlephase alternating current and 480 V for three-phase alternating current. Charging mode 2: Connection of the electric vehicle to a AC mains power supply (which does not exceed 32 A and 250 V with a single phase or 480 V for three phase) using standard- ized socket outlets and line conductors, neutral conductors and protective conductors together with a pilot function and a residual current device between the electric vehicle and plug or as part of an in-cable control box (ICCB). The in-cable con- trol box must be located in the plug or at a distance of up to 0.3 m from the plug or the Electric Vehicle Supply Equipment (EVSE). Charging mode 3: Connection of the electric vehicle to the AC mains power supply using a dedicated EVSE. Here, a pilot function extends to control equipment in the EVSE which is connected permanently to the AC mains power supply. Charging mode 4: Connection of the electric vehicle to the AC mains power supply using an external charging device. Here, a pilot function extends from the electric vehicle to the device which is connected permanently to the AC mains power supply. Only charging modes 2, 3 and 4 ensure: • Continuity of the protective conductor is monitored. • A fault current device sensitive to all current types is provided which protects the upstream electrical system from DC fault currents in the event of an error. • The vehicle is connected correctly. To assure electrical safety, the requirements of IEC 60364-4-41 (or DIN VDE 0100-410) must be implemented. Furthermore, IEC 60364-7-722:2015-02 (or DIN VDE 0100-722) stipulates that every charging station must be supplied by its own power circuit. In addition, charging modes 2, 3 and 4 offer integrated protection in the event of a smooth DC residual current. If an existing socket-outlet or vehicle connector accord- ing to IEC 62196 is to be used to charge electric vehicles, first ensure that the power circuit is suitable (e.g. cable cross section). According to IEC 60364- 7-722:2015-02, a residual current device (RCD) is required for each charging socket-outlet and every charging circuit must be protected with its own overcur- rent protective device. It is important to remember when selecting the RCD that protective safeguards against DC residual currents must be provided, which can also be integrated in the charging station. Suitable equipment is a type B RCD or a type A RCD in conjunction with suitable equipment (such as the Bender RCMB420EC residual current monitor) to disconnect the supply in the event of DC residual currents > 6 mA. Since charging stations are operated at their rated out- put, particular attention must be paid to environmental conditions (temperature, installation type, voltage drop, bending radii etc.). To comply with prevailing technical connection con- ditions (TAB 2007), individual devices above 12 kW require notification and approval. As per the new draft of the German low-voltage technical connection regu- lations (TAR Niederspannung: E VDE-AR-N 4100:2017- 05), only charging devices for electric vehicles with a rated output greater than 12 kVA require the approval of the grid operator. Also, charging devices for electric vehicles with rated outputs in excess of 4.6 kVA need to be declared to the grid operator. ractical Page B Expertise Connection of charging stations for electric vehicles Dipl.-Wirtsch.-Ing. Michael Faust Bender Academy

RkJQdWJsaXNoZXIy NDA2MTcz