Specific charging requirements for the 22 kW inverter charger (version 5AL 601 / code 908) New

  • For technical reasons, the 22 kW charger in the smart EQ is somewhat more sensitive than other chargers in cars. Accordingly, smart announced at some point what the exact requirements are. These apply to all electric smarties in the 453 series and only to those with a 22 kW charger. The 4.6 kW / 7.2 kW charger is not affected.


    FeatureMode 2 (1-phase)Mode 3 (3-phase/1-phase)If there is a problem with the respective point when loading, you can try the following solutions:
    please note: Charging cable plug - socketThe plug (or plugs) of the charging cable must be correctly inserted into the charging socket (vehicle and, if applicable, charging station / household socket). Ensure that it is firmly seated.The plug (or plugs) of the charging cable must be correctly inserted into the charging socket (vehicle and, if applicable, charging station / household socket). Ensure that it is firmly seated.The charging cable plug is often not inserted into the socket as far as it will go: Insert the charging cable plug into the socket as far as it will go!
    to note: max. asymmetrical load e.g. 20 A in Germany ..., 16 A in Austria ...If the vehicle is charged with the Mode 2 charging cable approved by smart for the respective country, all specifications are complied with.If the vehicle is charged with the Mode 3 charging cable, but the charging pole / wallbox is only connected to single-phase, the vehicle will not reduce the charging current. Regional regulations must be observed!If the smart ed (smart EQ fortwo / forfour) is charged with the Mode 3 charging cable at a charging station / wallbox that is only connected to single-phase charging:
    Set the maximum charging current at the charging station / wallbox so that the regional regulations regarding asymmetrical grid load are observed (e.g. Germany: max. 20 A).
    Prerequisite:
    Earthing connection of the charging pole/wallbox
    < 100 Ohm< 100 Ohma) Try using a different connection point (without HF interference)
    b) Identify the source of the HF interference in the network and switch it off
    during the charging process
    (if necessary, you can work together with a smart ed (EQ) specialist electrician who observes the vehicle's reaction to the respective HF interference in real time ( "Raw Leakage Current-High Frequency" signal ))
    c) Try charging the vehicle with Mode 3 (3-phase) (the 22 kW AC charger is
    optimised for Mode 3 (3-phase) charging).
    d) If necessary, install an EMC filter with sensors on site that works on demand
    Prerequisite: Circuit breakerCurve B or C (IEC 60898-1)Curve C (IEC 60898-1)The rating of the overcurrent protection device should be at least 125% of the rating of the charging pole/wallbox or the rated current for Mode 2 charging. The charging pole/wallbox should have a protective device as follows:
    20 A (for a 16 A / 1-phase or 3-phase charging point)
    25 A (for a 20 A / 1-phase or 3-phase charging point)
    32 A (for a 25 A / 1-phase or 3-phase charging point)
    40 A (for a 32 A / 1-phase or 3-phase charging point)
    80 A (for a 63 A / 3-phase charging point)

    If the circuit breaker is installed in the charging pole/wallbox, its rating may correspond to that of the charging pole/wallbox if:
    - either temperature monitoring of the circuit breaker is provided to prevent the risk of tripping due to PWM-triggered charging current derating
    - or the circuit breaker is designed so that the normally occurring maximum charging current at the normally occurring maximum temperature does not lead
    to tripping
    Prerequisite:
    Max voltage between N and PE
    < 10 V (rms)< 10 V (rms)If this requirement is not met, the cause of the voltage difference must be identified and eliminated before the charging pole/wallbox can be put into operation.
    Prerequisite: Connected load for 32 Amps charging pointsN.A.>100kVAThe distance between the charging pole/wallbox and the grid operator's connection station (low or medium voltage) should be as short as possible so that the grid impedance is as low as possible.
    Prerequisite: Power grid formIT system is excluded for the 22 kW chargerIT system is excluded for the 22 kW chargerThe 22 kW charger can only be operated in a TT or TN system !
    Prerequisite: Residual current<30 mA<30 mAA protective device against DC residual currents must be provided in the charging infrastructure in accordance with current standardisation - regardless of whether 1- phase or 3-phase charging is to be used. This can be a type B RCD, for example. If local regulations permit, this may also be a type A RCD if the charging station itself (e.g. the wallbox) is equipped with a specific DC residual current device that ensures the correct functionality of the installed type A RCD.
    In any case, the protective device of the higher-level installation must be coordinated with the circuit breaker and the residual current device of the charging station.
    If a type B RCD is used in the charging station (e.g. wallbox), it must be ensured that each RCD in the higher-level installation is of type B or is supplemented with a DC residual current device that ensures the correct
    functionality of the RCD .
    Prerequisite: min. Voltage
    150 V
    150 V -
    Prerequisite: min. Charging current according to CP (Control Pilot) signal 6 A8 AIf the charging current limited by the charging pole / wallbox falls below 8A (3-
    phase charging), the 22 kW charger interrupts the charging process. Increase the CP
    signal of the charging pole / wallbox to at least 13% (3 - ph a se charging) if
    permitted by the charging infrastructure. You may need to contact the charging station operator for this.

Share

Do you have questions about smart and e-mobility or do you want to discuss the content of this page?


Then register today here in the smart EMOTION forum. The constantly growing community is happy to engage in expert discussions and share their experiences with you. I also participate and support you with my network and expertise.