@Martin : avec tout ce que j'ai lu d'infos utiles de ta part, content de te renvoyer l'ascenseur
Encore quelques infos utiles alors...
What Do I Need a Residual Current Device for?
The residual current device (RCD) is there to avoid electric shocks. An RCD balances the electric current in the live and neutral wires to/from the appliance, in this case, the electric car. If these currents are no longer balanced, for example, if a residual current flows through the bodywork of the car or the driver to the floor, the RCD is triggered and breaks the circuit. To ensure that this is the case, where an RCD is not already integrated into the charging station, each charging station must be fitted with its own individual RCD. For protection, there is a diversity factor of 1.0, which means that each circuit must be individually protected
Which Types of Residual Current Devices Are There?
A residual current device of Type A at least is required for each charging station. The Type A RCD is a standard RCD protection switch which is carried by every electrician and which only registers particular fault currents
. Some electric cars may generate smooth DC fault currents during charging. If you cannot exclude this possibility, then an appropriate DC residual current protection must be installed. There are various options for this:
DC fault current sensor / DC fault current recognition:
Charging station manufacturers are increasingly building DC fault current sensors into their charging stations. This offers you protection from smooth DC residual currents. You then only need the cheaper Type A RCD mentioned above in the distribution. Charging stations with integrated fault current sensors are a little more expensive, but they then cost less to install. As a result, the total package is significantly cheaper.
RCD Type A EV:
A Type A EV RCD is a cheaper alternative to an RCD Type B and has been specially developed for the demands of electric mobility. It therefore also reacts to smooth DC residual currents
. We strongly recommend a Type A EV RCD, if no other DC residual current protection is in place in the charging station.
RCD Type B:
A Type B RCD is “sensitive to all currents
”, recognises all types of AC and DC residual currents and is very well-suited for charging station installation. The disadvantage: A Type B RCD is very expensive.