Protective earth (PE) loss detection
AssigneeABB Schweiz AG
InventorsGertjan Koolen, Balazs Villanyi, Lars Bech, Jim van-der-Heijden
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Abstract
A Protective Earth (PE) loss detection method for charging an electrical vehicle is provided. The electrical vehicle comprises an Electrical Vehicle Supply Equipment (EVSE), a charging connector, and/or 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 comprises detecting interruption of the PE line by observing a change of the PP signal.
Claims21
A Protective Earth (PE) loss detection method for charging an electrical vehicle comprising an Electrical Vehicle Supply Equipment (EVSE), a charging connector, and/or 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 wherein the change comprises a different direct current (DC) level of ≤40, 50 or 60% of a DC level of an uninterrupted PE line.
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 of ≤0.3 V, ≤0.4 V or ≤0.6 V using a CCS1 protocol or of ≤1.2 V, ≤1.6 V or ≤2.0 V using a CCS2 protocol.
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.
Dependencies are inferred from the claim text.