An RCD (residual current device) of the highest category specially designed for electrical installation of fixed charging stations - wallboxes.
We recommend this type for installation of wallboxes up to 3x25A.
Only the RCD of type B allows absolutely safe installation of wallboxes not being equiped with the function of detecting residual direct currents. RCDs type B are required for wallbox installation in some European countries, e.g. Germany, Netherlands etc., while valid norm requires RCDs type A at least .