Monitoring Of Welded Relay Contacts Failure - VESTEL EVC04 Serie Guia De Instalacion

2.7 - MONITORING OF WELDED RELAY CONTACTS FAILURE

According to IEC 61851-1 and EV/ZE Ready requirements, EVC04 EV Charging Station has welded
contactor sensing function, and welded contactor information is provided as a contactor welded
output signal from the control board.
To detect welded contact failure for the relays, CN1 connector output terminals must be monitored.
In case of a welded contact for the relays CN1 connector output terminals are shorted. If there
isn't an error, CN1 connector output terminals must be open.
The circuitry on the main board of the charging station is shown in figure-23.
+12V
Connector terminals must be connected to a safety extra low voltage circuitry (Vcc<50V and Icc<0.5A)
Shunt trip module is mechanically coupled to RCCB (or MCB) at the fuse box of the charging station.
The circuitry block diagram that must be used at the fuse box of the charging station is shown below.
EVSE
IG v7.3.0 2020
1
4
2
1
CN1
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Imax < 0.5A
2
RL
3
Figure-23
Power Supply
(Vmáx <50Vac
Imax <0,5A)
Figure-24
Shunt
RCCB
Trip
or
Module
MCB
2
1
CN1
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