Application of Leakage Current Protection in Electric Vehicle Charging Piles

1、There are 4 modes of electric vehicle charging piles:

1) Mode 1:

• Uncontrolled charging

• Power interface: ordinary power socket

• Charging interface: dedicated charging interface

•In≤8A;Un:AC 230,400V

• Conductors that provide phase, neutral and ground protection on the power supply side

Electrical safety depends on the safety protection of the power supply grid, and the safety is poor. It will be eliminated in the GB/T 18487.1-2 standard

2) Mode 2:

• Uncontrolled charging

• Power interface: ordinary power socket

• Charging interface: dedicated charging interface

•In<16A;Un:AC 230

• Power and current: 2Kw (1.8Kw) 8A 1Ph; 3.3Kw (2.8Kw) 13A 1Ph

• Ground protection, overcurrent (overtemperature)

• Conductors that provide phase, neutral and ground protection on the power supply side

• Function with protection device/control

Electrical safety depends on the basic security protection of the power grid and the protection of IC-CPD

3) Mode 3:

• Input power: low voltage AC

• Charging interface: dedicated charging interface

•In<63A;Un:AC 230,400V

• Power and current 3.3Kw 16A 1Ph; 7Kw 32A 1Ph; 40Kw 63A 3Ph

• Ground protection overcurrent

• Conductors that provide phase, neutral and ground protection on the power supply side

• With protection device/control function, the plug is integrated on the charging pile

Electrical safety is based on special charging piles and guided detection between piles and vehicles

4) Mode 4:

control charging

• Station charger

• Power 15KW, 30KW, 45KW, 180KW, 240KW, 360KW (charging voltage and current depend on module size)

• Functions with monitoring protection devices/controls integrated into the pile

• Built-in charging station charging cable

Currently CHINAEVSE mainly provide Mode 2, Mode 3 and Mode 4 EVSE products, But Mode 5 wireless charging will be developed very soon.