Electrical Protections For Charging Stations - hager Witty Installationsanleitung

• Electrical composition of the front panel
HMI electronic signalling card

5. Electrical protections for charging stations

• Quality of the earthing according to the EV READY label 1.4
NOK
Neutral
system
IT
without
isolating
transformer
• Detection of contacts stuck to the contactor according to the EV READY 1.4 label.
All of the charging stations with a rated load power greater than 3.6 kW are provided with a device that detects if a contact is stuck to the
contactor.
Shunt coils
MZ203
EV READY 1.4
Electrical network
disconnection if the
contactor is stuck
The 6 mADC detection is integrated into the charging station, making it possible to dispense with a type B differential (according to standard
NF-EN 61851-1 : 2017). All of the circuits must be fully installed in the same building structure (from an electrical point of view).
34
TN or TT neutral system
100 Ω max for
10 charging
stations
100 Ω
max
Fault detected
=
Information indicator light
is steady red for 3 seconds
+
Network disconnection
Function: trigger/Shunt Trip (ST) rigid cable 2 x 1.5 mm
Function: trigger/Shunt Trip (ST) rigid cable 2 x 1.5 mm
OK
10 charging
stations
max on
1 ground wire
Power > 4 KVA only
7. Wiring the shunt coil
MZ203 (Shunt Trip function)
2
Interconnection
Refer to chapter
2