Electrical Protection Devices - Siemens SICHARGE UC 100 Operating Instructions Manual

Routing cables between the charging station and the charge point
The DC charging cables from the charging station to the SICHARGE UC Dispenser, SICHARGE
MastHood, or SICHARGE MastPanto must be installed either underground or routed directly on
the ground. We recommend using shielded cables when routing cables above ground to reduce
any electromagnetic radiation of the cables. If there is still interference in the frequency
spectrum, further measures may be necessary, for example, using EMC filters or ferrites, which
must be attached to the starting point of the DC charging cable.
Additional information
You can find more information on connecting and operating charge points together with the
SICHARGE UC charging station in the following documentation:
• SICHARGE UC Dispenser operating instructions
• SICHARGE MastHood operating instructions
• SICHARGE MastPanto operating instructions
3.5

Electrical protection devices

The charging station is equipped with several electrical protection devices.
Overvoltage protection
The charging station has 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 mains voltage exceeds or falls below the
permissible limits, the charging station interrupts a 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 charging
station. The charging station supplies the system with power directly from the input voltage.
This allows the system to monitor currents even when there is no output voltage.
The 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 separates the charging module and the vehicle electrically. No more
charging current flows between the charging station and the vehicle. A fuse at the input
protects the charging station against overcurrent. A fuse also protects the electric vehicle
against overcurrent at the output.
SICHARGE UC 100, UC 200, UC 300, UC 400, UC 600, UC 800
Operating Instructions, 10/2022, A5E50828019-AC
Description
3.5 Electrical protection devices
37