Patent ID: 11933862
Assignee: ABB SCHWEIZ AG
Field: Transport (Mechanical engineering)
Classification: CPC B  G  H  Y | IPC B  G

Claim 19:
20. A Protective Earth (PE) loss detection method for charging an electrical vehicle comprising an Electrical Vehicle Supply Equipment (EVSE), a charging connector, and a charging cable comprising at least a Proximity Pilot (PP) line for a PP signal, a Control Pilot (CP) line for a CP signal and a PE line for a PE signal, the method comprising:
detecting interruption of the PE line by observing a change of the PP signal while the CP line is uninterrupted, wherein the change comprises:
a different direct current (DC) level, which is ≤60% of a DC level of an uninterrupted PE line, or
an alternating current (AC) component and/or a pulse width modulated (PWM) signal.