Electrical Protection Devices - Siemens SICHARGE UC 150 UL Installation And Operation Manual

SICHARGE UC 150 UL Plug-in Dispenser | Installation and Operations Manual

3.5 Electrical protection devices

The SICHARGE UC dispenser is equipped with multiple electrical protection devices.
Note
No EMERGENCY OFF button on the SICHARGE UC dispenser
The EMERGENCY OFF button is installed directly on the connected SICHARGE UC charging station.
On the outside of the SICHARGE UC dispenser, attach a visible map with the location of the connected
SICHARGE UC charging station. All persons in this area must be instructed on how to act in an emergency.
WARNING
Resetting alarm states
Some alarm states may only be reset by qualified electricians.
Overvoltage protection
The overvoltage protection is provided by an upstream SICHARGE UC charging station.
The SICHARGE UC charging station offers comprehensive protection against overvoltages from the
distribution network. Voltage-dependent resistors with short response times protect each line conductor
of the power cable against overvoltages. In addition, the control system of the charging station constantly
monitors the mains voltage. If the main voltage exceeds or falls below the permissible limits, the charging
station interrupts the charging process in progress or does not start the charging process.
Overload protection
A separate system constantly monitors the input current and the output current in the SICHARGE UC dispenser.
The SICHARGE UC dispenser supplies the system with power directly through the input voltage. This allows the
system to monitor currents even when there is no output voltage.
The charge controller constantly monitors the input current and the output current. If a measured current
value exceeds the preset limits, the control system opens the main contactor. The open main contactor electrically
separates the charging module and the vehicle. The charging current ceases to flow between the SICHARGE UC
dispenser and the vehicle. A fuse at the input protects the SICHARGE UC dispenser from overcurrents.
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