4.4
Technical functioning
4.4.1
Normal operation
Normal positions of the different switches and breakers when the charger is in operation (idle; not
charging):
Front panel
-
Main switch (A): Vertical (“1”)
-
RCD DC Charge power group (B): up.
-
RCBO Control group (C): up.
Right side panel (Controls and DC charging):
-
Overvoltage protection (E): up
-
Circuit breakers power modules (H, 5x): vertical (“1”)
Left side panel (AC charging):
-
RCD (I): up
-
MCB (J): up
4.4.2
Power distribution
The main power can be switched off using the main switch (A). This switch is accessible when
opening the front door. If the main switch is off, the grid voltage is removed from all components
in the charger except the bottom side of the main switch where the grid cable is connected (D).
From the main switch the power is divided into groups. The Charger has two (only DC charging) or
three (DC and AC charging) power groups:
•
Control power group; feeds power to all electronic components in the cabinet
•
DC charge power group; feeds power the power modules needed for DC charging.
•
AC charge power group; feeds the AC charging.
The control group is protected by an RCBO (C). This is a combined earth leakage and over current
detection device.
The DC charge power group is protected for earth faults by a high immunity RCD (B).
An AC relay (F) switches the power to the individual circuit breaker (H, 5x) of each power modules.
This relay is controlled via a safety circuit by:
•
Emergency stop button
•
Earth leakage detection
•
Door switch
•
Software
