Proximity Pilot(PP) is one of two plug contacts in the charging plug of the CCS charging system. The other is the Control Pilot( CP). The proximity pilot determines the extent to which the charging cable's current capability is ensured. It is also used to activate the immobilizer. The electric vehicle can only drive away when the charging plug is unplugged.
#2 The load capacity of the charging cable is determined via a resistance measurement and is based on the cable's standard values: resistance, conductor cross-section, max. charging current. To ensure that both the charging station and the electric vehicle recognize the maximum current load, a resistor is built into both charging plugs between the PP contact and the protective conductor. There are four resistance values between 1.5 kOhm and 100 ohms, representing charging currents between 13 A and 63 A. With a conductor cross-section of 1.5 qmm, the charging current may be max. 13 A, with 16 qmm max. 63 A. The charging current is reduced by pulse width modulation. With a pulse width of 50 %, the charging current is max. 30 A, with one of 15 % max. 10 A.