INCH Duo Components

Owned by David Rus
Mar 12, 2024
5 min read

4. Charging Station Components

Charging station components depend on configuration of each charging station.

List of components

  1. Miniature circuit breaker (80 A)

  2. MID meters

  3. RCDs

  4. Miniature circuit breakers (40 A)

  5. Contactors

  6. Power supply unit

  7. Router

  8. LCD display

  9. Type 2 Socket

  10. LTE antenna

  11. RFID antenna

  12. DI/DO terminals

  13. Power supply board

  14. 14.1. LTE module, 14.2. RFID module, 14.3. IEC module

  15. Main controller module (ARM)

  16. LED driver

  17. Heaters

  18. Miniature circuit breaker for electronics (6 A)

 

 

Figure 4: Overview of charging station components

 

4.1 Schematic: Circuit Diagram

Actual wiring of the product can be different across different versions of the product.

4.2 Schematic: Placement of Components

Actual wiring of the product can be different across different versions of the product.

4.3 Schematic: Communication and Logic

Actual wiring of the product can be different across different versions of the product.

4.4 Power Supply Board

Power supply board is the main board inside charging station. It holds and allows communication between modules and processor unit and provides connectors for other peripherals.

4.5 Main Processor Unit

Processor is the main element for calculations behind the charging station operation and power management.

Figure 5: Main processor unit

4.6 Mobile Communication Module

Mobile communication module is an optional module that allows charging station connects to LTE network and is used when charging stations are installed in public environment.

Figure 6: Mobile communication module

4.7 Wi-Fi Module

Wi-Fi is an optional module that allows charging station to connect to LAN using the wireless connection.

Figure 7: Wi-Fi module

4.8 Contactor

Two contactors are used, one for each charging socket. Contactor work as a remote switch.

Figure 8: Contactors inside the INCH DUO charging station

4.9 Socket

Socket allows electric vehicles to be connected to the power supply and to charge.

Figure 9: Charging station's socket

4.10 Internal Power Supply

Power supply is an electric element that converts 230V AC input voltage to 12V DC and 5V DC output voltage.

 

 

Figure 10: Internal power supply module

4.11 MID Meter

The MID meter measures electrical quantities and is an electric meter that has obtained a certificate of compliance with the MID directive.

MID meter can be used to read the measurement straight from the LCD screen of the meter or from the charging station display or via web interface. Two MID meters are used, one for each socket.

 

Figure 11: MID meter installed inside the charging station

4.12 Protection Elements

To protect user, EV, and installation behind charging station protection elements need to be installed in the charging station and in the installation, in electrical cabinet.

4.12.1 Overcurrent Protection Element

Overcurrent protection devices protect against overcurrent and short-circuit currents. Actual implementation is with use of miniature circuit breakers – MCBs.

The main four-pole MCB is selected for maximal current of 80 A. Two additional four-pole MCBs are installed, one for each socket, both for 40 A. In addition, two-pole MCB (6 A) is installed to protect electronic circuits.

Figure 12: Overcurrent protection installed inside the charging station

4.12.2 RCD Protection Element

Residual current protective units provide fault protection; this can happen in case of indirect contact, during the direct contact and can also prevent fires caused by the ground-fault before they even start. Two RCD units are used, one for each socket.

Figure 13: RCD installed inside the charging station

4.12.3 Power circuit

Replacing power circuit (installed in station from serial number 23050153)

Removal

a)       Set charging station in Service state (power off station)

b)      Remove protection cover plate

c)       Disconnect cables for MID meter (green), contactor (yellow)and feedback sensing cable (red) from power board for appropriate connector (1 or 2)

  Connector 1                                                                       Connector 2

 d)      Cut the tie that holds the cables

  e)      Disconnect socket wires from contactor for appropriate connector (1 or 2)

f)        Disconnect 3 phase voltage supply and grounding wires for power circuit from MID meter

 g)       Remove power circuit from charging station by removing 2 wingnuts and washers

 h)      Front view of power circuit

i)        Rear view of power circuit

Installation

a)       Place power circuit on its place and fasten 2 washers and wingnuts

b)      Connect 3 phase voltage supply and grounding wires for power circuit to MID meter

c)       Connect cables to contactor (Brown, Black, Gray, Blue)

d)      Capture the cables and secure them with a tie

e)      Connenct cables for MID meter (green), contactor (yellow) and feedback sensing cable (red) to power board

Feedback sensing cable (red) connection position

 

f)        Install protection cover back on

g)       Return Charging station to operating state

 

IMPORTANT

In case of necessary replacement of elements in the power circuit, it will be necessary to remove the ties and then replace them with new ones after replacing the component.