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PRODUCT OVERVIEW
Ground Fault Circuit Interruption
Integrated ground fault circuit interruption (GFCI) protection automatically detects a current mismatch
between power delivery conductors that would indicate that current is flowing through the ground (PE)
conductor.
If a ground fault occurs after 10 seconds of charging, Wall Connector will wait 15 minutes before
automatically re-attempting to charge. Up to four attempts to charge will be made before user
interaction is required.
If a residual current fault occurs within 10 seconds of charging, Wall Connector will lock out and user
interaction is required to restore charging functionality.
Recommended interaction includes pressing the button on the charging handle, or removing the
charging handle from the vehicle and reinserting it. If this does not resolve the issue, look for a ground
fault issue such as water ingress.
Ground Assurance
Wall Connector continuously checks for the presence of a safe ground connection and automatically
recovers from faults. Ground assurance operates by injecting a small amount of current into the ground
conductor in order to measure the impedance between line and ground. If high impedance is detected,
the Wall Connector will lock out charging and display a fault code of two (2) red blinks. See
Fault Codes
on page 27
for a full list of fault codes.
One leg of the distribution transformer must be ground-bonded (Neutral) for the ground assurance
detection to function properly. Residential power supplies typically bond ground to neutral at the main
electrical panel, while commercial sites must provide a ground bond at the transformer. Ground bond
should only occur at one location in a site's electrical system.
Wall Connector ground assurance does not support an IT grid configuration.
Temporary problems such as ground faults or utility power surges are resolved automatically.
Power Outages
If there is a power outage while Wall Connector is charging a vehicle, charging will automatically resume
within 1 to 3 minutes after power restoration. The Wall Connector will display a solid blue light on the
faceplate to indicate that it is communicating with the vehicle and waiting to resume charging.
Alternatively, pressing the button on the charging handle after power restoration will cause Wall
Connector to resume charging immediately.
Firmware Updates
Firmware updates will be automatically applied to the Wall Connector to improve the user experience
and introduce new features. Connect Wall Connector to Wi-Fi for access to the most recent firmware
update. See
Commissioning Procedure on page
22.
Tesla vehicles can provide firmware updates to Wall Connectors.
8
Gen 3 Wall Connector Manual
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