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12 Monitoring welded relay contacts
The TECHNIVOLT charging station has a function for detecting welded relay contacts in
accordance with the requirements of IEC 61851-1 and EV/ZE Ready. This information is provided
by the PCB.
The output terminals of the plug CN33 are used to detect welded relay contacts.
A 230 V voltage will be present at the plug CN33 in the event of welded relay contacts. This
can be used to trigger a working current trigger remotely. The working current trigger is linked
mechanically with the line protection switch and switches it o if triggered. This interrupts the
mains power to the charging station.
The connection of the working current trigger is shown in the following Illustration .
Illustration 22: Connection working current trigger"
Connecting the control line to the charging station is carried out as follows Illustration .
Illustration. 23: Connection control line for working current trigger
NOTE
Introduction of the control line into the charging station is described in Chapter
„9.2 Data cable connection“, Page 47.
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