Über unser belgisches 3x230V -Spezialnetzwerk

[ON5WS]

Hallo zusammen,

Zunächst einmal entschuldigt bitte die Fehler in dieser Nachricht. Meine schlechten Deutschkenntnisse zwingen mich, den Google-Übersetzer zu verwenden ;-)

Ich komme hier auf normbxls Frage zurück: https://www.tinkerunity.org/topic/12466-warp-wallbox-mit-3-phasen-ohne-nulleiter-it/

Ich lebe in Belgien, wo wir ein dreiphasiges 3x230 V Stromnetz ohne verteilten Neutralleiter, aber ein TT-Diagramm haben (da bin ich mir 100 % sicher!), kann der Warp3 auch zweiphasig mit Strom versorgt werden, mit einem Kabel an L1 und einem anderen an N?

Natürlich wäre der Warp auf eine 32 A Phase beschränkt.

Zwischen L1 und N würden 230 V anliegen, um den Warp mit Strom zu versorgen. (In unserem Netz gibt es nirgendwo 400 V).

Ich bin ziemlich sicher, dass es funktionieren kann, aber die Frage betrifft den Erdungstest.

Tatsächlich haben wir in unserem Netzwerk 230 V zwischen jeder Phase, aber auch ± 133 V zwischen jeder Phase und der Erde (230 : √3).
Ist das ein Problem für das EVSE-Modul?

Andere Wallboxen, ebenso wie mein SMA-Wechselrichter, haben eine Einstellung, um den Erdtest zu entfernen. In jedem Fall gibt es einen 30 mA Schutz stromaufwärts.
Würde es hier die gleiche Möglichkeit geben?

Vielen Dank im Voraus für Ihre Antworten.
Das Warp3 ist meines Wissens das einzige Ladegerät, das alle meine Erwartungen erfüllt (Web-Schnittstelle, keine Cloud, LAN, HTTP, MQTT, Modbus, OCPP usw.).

[MatzeTF]

If your German isn’t good enough, feel free to write in English instead. Don’t worry if your English isn’t perfect, as long as it’s understandable, it’s fine.

I see that we misunderstood the question the last time. The diagram you posted is very helpful and I think I understand the issue now.

It should be possible to use a Warp 3 powered by two phases (left variant) if your house’s earthing is good enough. It worked fine in a simulation, but I don’t have a suitable 133 V supply to actually test it. Now you might not want to buy a charger that “should” work. If ground detection doesn’t work for you, we will also introduce an option to disable it, just like other manufacturers are doing it. Simply ask here again and we will add it for you.

[ON5WS]

Hello MatzeTF,

Thank you very much for your quick reply.

It would be fantastic if you could add this option in the software. I would then be completely sure that it would work on our special network.

The car (coming soon, Skoda Superb 4 iV) has a charger announced at 11 kW, so in three-phase  3x400 V  16 A, and single-phase  7.2 kW  230 V  32 A.

I am almost certain that it will not charge on 3x230 V. VW is surely not going to develop a specific charger just for the people of Brussels ;-)

and therefore, I will limit myself to 7.2 kW in single-phase.

I suppose that I should then order the 22 kW version (+ the 7.5m cable that I need) ?

How should I proceed? Of course, I am interested in the Warp3 Smart.

[MatzeTF]

Yes, you need the 22 kW version because that provides 32 A. The 11 kW version only provides 16 A. Please order via our shop or contact sales@tinkerforge… if you have any questions regarding ordering. Our sales staff is fine with English too.

Btw, the car might be able to charge on 3x230 V. Most newer cars accept a line voltage in the 100 - 250 V range, so 133 V is probably fine. VW might not have been thinking about the people of Brussels, but they were certainly thinking about the USA, which uses both 120 V and 240 V. Unfortunately, Warp Chargers cannot run with a line voltage of 133 V (3x230 V), so that’s not an option for you.

[ON5WS]

Good evening MatzeTF, thank you for your answer. There is still something that bothers me. Do you say that the Warp Charger does not work in bi-phase ? The American system is completely different from what we have here. If you look at the diagram above, you will see that the transformer of the electricity company is wired in "star" (the legend on the diagram is wrong !), with the neutral grounded. The voltage between all the phases is 230 V. The neutral is not distributed, which means that in each house, there are only 3 wires entering (triangle wiring). Everything in the house is connected between the phases, and therefore in 230 V.
Between the phases and earth, there is 133 V (of course, 30 mA in this loop will trip the RCD).
And it is precisely the presence of these 133 V which makes me believe that the EVSE module is not going to like ! Except, if you want to put an option to avoid the earth test, such as on other devices that must work on our network.
How could I know that this option is available ?
Sorry to bother you with my questions, but I obviously want to be sure that it will work 🙂

[MatzeTF]

What do you mean with “bi-phase”? If you are referring to the left side of the diagram you posted, which I called “two phases”, I already said that that should work with a Warp Charger because the voltage between the phases is 230 V.

What doesn’t work with a Warp Charger is the right side of the diagram: feeding it three phases with a line-to-ground voltage of 133 V each.

When I mentioned the American system, I meant that many modern cars can charge with a line-to-ground voltage of 133 V because they are made to be compatible not only with 230 V but also with 110 V so that emergency chargers can be used with American standard power outlets. This was meant to be an additional information that has nothing to do with the Warp Charger.

[ON5WS]

Ah, ok, that's clear now  😉
Thanks !