...
Class D same as Class III or Type 3 (protections in devices, in our case - varistors)
What could go wrong?
If the station is connected incorrectly, it will damage several variators.
There are two scenarios of overvoltage: interphase or earthing overvoltage.
If one or the other happens, it will damage one varistor. If both happen at the same time multiple varistors.
When this happens, it can also damage cables and connectors!
...
IMPORTANT: always check the connection (in electrical cabinet and in charging station) before the first start-up.