Case A is a charger connected to the keys (main supply wires usually connect to the charger) usually connected to 1 or 2 modes
Case B is an onboard car charger with the main supply cable which can be separated from both the supply and the vehicle - generally, mode 3
The case is a dedicated charging station with DC supply for cars. The mood supply cable can be permanently attached to the charging station, such as mode 4.
There are four different plug types:
Type 1 - Single phase car connector - SAE J1772 / 200 9 reflects automotive plug specification
Type 2 - single and three phase car connector - VDE-AR-E 2623-2-2 reflects plug specification
Type 3 - Equipped with single and three phases car connector safety shutter - EV Plugging Alliance Resolution Reflected
Type 4 - Fast Charge Capsular - For special systems such as CHADMO