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How does a EVSE interface look like? Is there any standard that defines it?

the EVSE interface is defined in international standard IEC 61851-1 and the types of vehicle connectors are defined in IEC 62196-2.

The table and Figure 1 below show the two types of AC connectors that are predominantly used. They have different shapes and different number of phases: Type 1 is a single-phase and Type 2 is a three-phase connector.

Both types of connectors have two additional control signals: control pilot (CP) and proximity contact (PP). However, there is a difference in proximity function between the Type 1 and Type 2 connectors.

Type 1 (5 Pins) Type 2 (7 Pins)
  • Phase (L)
  • Neutral (N)
  • Protective Conductor (PE)
  • Control Pilot (CP)
  • Proximity Contact (PP)
  • Phase 1 (L1)
  • Phase 2 (L2)
  • Phase 3 (L3)
  • Neutral (N)
  • Protective Conductor (PE)
  • Control Pilot (CP)
  • Proximity Contact (PP)
Figure 1

E-car plugs and sockets: single-phase type 1 (left) and three-phase type 2 (right) with their PIN assignment