FunctionFunction
CC612(4G)_D00325_04_M_XXEN/03.2019
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• For AC charging system fault monitoring, the charge controller features an integra-
ted RDC-MD which uses an externally connected current transformer for fault moni-
toring of AC charging systems. With the integrated DC residual current monitoring
function, only a RCD type A is required in the charging system.
• Data exchange between the EV and the charging system is possible via ISO 15118
compliant Powerline Communication (PLC). This feature is optional and if
purchased, will be enabled by a future software update.
• If a malfunction occurs, a report is sent to the backend system using the OCPP
protocol.
• The data management and control functionality of the charge controller provides:
• Remote restart after a residual current trip that is recognized by the CC612.
• The smart sensor detects critical fault currents before the relays are tripped. This
can be used a prewarning for the vehicle owner.
• Load current and cooling control (via a temperature sensor)
The charge controller has internal temperature sensors (on the inside of the cont-
roller housing) that allow the temperature in the ambient environment of the
charge controller to be estimated. Based on this estimation it is possible to dyna-
mically reduce the charging current or even suspend charging. This feature can
serve to maintain an ambient temperature within the permissible range of the
components used in a charging system. Two temperature thresholds can be set
on the manufacturer configuration tab and are based on measurements in com-
mon housing scenarios. The first threshold reduces the charging current to the
configured value if it is exceeded. The second threshold will suspend charging.
The charge controller with optional RDC-MD only works in combination
with the measuring current transformer (which must be ordered separa-
tely).
The temperature measurement is an estimation based on temperature
sensors positioned on the inside of the controller housing where the actu-
al temperature is affected by heat generated by the controller itself. Be-
cause the threshold values are based on measurements in common
housing scenarios, each charging system vendor should undertake practi-
cal measurement experiments to validate the correctness of these
thresholds and add offsets if necessary.
• Peer group mechanism
With the help of a peer group mechanism, it is possible to assign a current limit to
a set of charge controllers to share. To use this feature, the charge controllers
need to be connected in a way that enables them to establish TCP connections
with each other. This is possible, for example, using a USB to Ethernet adapter or
with a direct USB connection. In the operator web interface for each individual
member of this peer group, the IP addresses of all other peer group members
must be listed in the configuration parameter "Peer Group". In addition, all peer
group members need to have the same "Peer group maximum current (A)" set-
ting. Once configured, the total current is available to one controller if only one
controller is charging. This controller will however not exceed its maximum hard-
ware current setting. As more controllers start charging, the current will be evenly
shared by the peers. As controllers stop charging, the current is evenly distributed
to those that are still charging.
In the event two charge controllers are used in a single charging system and the
charge controllers are connected to a central charging system computer via their
USB device ports, it is necessary to assign individual IP addresses to these control-
lers to enable TCP/IP connectivity between both. This is possible using the confi-
guration parameters "USB additional fixed IP" and "USB additional fixed gateway".
The central charging system computer could either use bridging or routing bet-
ween the USB interface to enable connectivity.
• Remote:
• Software updates
• Temperature and residual current monitoring
• Remote login allows for remote maintenance options that reduce the number of
maintenance personal deployments per charger
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