Monitoring and switching off the induction hob over wifi (2 phases). How to implement?

Hello
By way of introduction: a few months ago I was looking for an induction hob with wifi. It was basically just about being able to see if the hob was working at all (it's on, drawing electricity) and possibly remotely switch it off. In the end, I ended up buying a classic hob, without any wifi, tie-dye, but quite ergonomic, user-friendly. More about my "investigation into the truth" in THIS topic


I am, however, slowly returning to the subject of the possibility of remote control operation/shutdown. If anyone asked why and what it is for - it was explained in that topic.
I am planning to implement in the switchgear. I would like to keep it relatively simple and at a relatively low cost. Space is also limited. The board is connected to a 3-phase network. Standard, that is, in fact, to two phases (2x230V, L,N), the oven and microwave are powered from the third.
I have found single-phase wifi modules with current/power measurement and shutdown. Of course you will need two. E.g. such:

https://pl.aliexpress.com/item/1005005625395611.html
In principle, judging from the description, these are "230V sockets with wifi", only that they are DIN rail mounted. However, I have doubts about the connection and "will it even work", which I have shown in the diagram below:

As you can see, the power "enters" via a B16 three-phase fuse. Then two phases to the board via the modules, each input "at the top" connected to the correct L and N. And here is the dilemma - the N "goes" towards the kitchen, past the fuse, as one common wire.
The L output "at the bottom" of the module - known, to the board.
But what about the N output on the module? Leave it unconnected? What about current/load measurement then? Will it work? (presumably depending on where the measuring shunt is located - "in L or in N"?) Or also connect to the neutral wire running to the board? That is, de facto short circuit to the N connected to the input ("at the top") of the module, as I have drawn a line with a question mark?

As option 2: I also searched on the internet for a three-phase wifi fuse/switch/monitor with which I could replace the current B16. And yes, there are such "in nature", e.g.:

https://pl.aliexpress.com/item/1005005243212896.html
but unfortunately without monitoring function. Only "off/on". With measurement I have not been able to find.
Beyond that a three-phase switch will also cut off my oven+microwave, watches again to set Although I assume the situation of the need for a remote disconnection will be very sporadic (hopefully never), so you can get over it.
I have also found energy measuring devices with current transformers, based on PZEM004T modules. You can quite inexpensively get pre-assembled 3-phase "folders" with wifi. The advantage would be that I could then do energy/load monitoring on all phases, for the whole house network, not just the induction alone. I think I would be able to tell if the hob is actually on, despite the possible operation of other appliances. Also, virtually no interference with the 'current' installation, just a matter of connecting the power supply. On the other hand, a possible remote disconnection of the hob will take care of the above-mentioned 3-phase switch with wifi. Or give up on switching off and stick to the load monitoring option (option 3). The snag is that the "folding box" almost certainly won't fit into the switchboard (although I'd have to measure again - I'm currently away from the property). I can still fit the two modules mentioned earlier somehow. I know - there are still devices of the type Zamel MEW-01 , but ceeeeeena...

Are there any other ideas, suggestions, proposals for devices?
Greetings.

Hello
I see the interest in the topic has fired up the Elektroda servers to the brim But I understand - holidays, holiday season, cucumber season, besides that the topic is rather niche.

I haven't bought anything yet, nevertheless in the meantime I have done some experiments with the induction hob. Namely, I found - as I expected, by the way - that disconnecting one particular phase causes the hob to switch off completely. Returning the voltage does not automatically switch it back on. It is necessary to find out on which phase the hob behaves this way.
In such a system, in the simplest solution I only need one module, disconnecting this phase. On the principle of: "I can't remember, am I sure I turned the board off?". I remotely "reset" and that's it.
Of course, giving up monitoring of the current flowing to the board (and if already, only on phase 1). And that's probably where I'll start for now. And perhaps I'll end there

But already more out of curiosity regarding the more extended option. In a previous post I wrote that I have not been able to find devices which, in addition to a 3-phase overcurrent fuse and a remote wifi switch, also have energy monitoring. Well, however, "in nature" there are such "cusies", e.g.:


https://pl.aliexpress.com/item/1005005625528078.html?
If I can see correctly in the pictures - there is a drawing with current transformers on the left under the switch knob. So just from that I infer that the current measurement in each phase is there. Also, the description states: "can monitor power, voltage, current,"
However, I have doubts about the wifi support. The description only states: "Configurable 485 4G/Zigbee/RS protocol". Will this thing connect to a standard 2.4GHz b/g/n network? I don't have a Zigbee gateway and don't intend to invest for the time being.
And then there is the matter of security.... On the pictures I seem to see the CE symbol, and probably it is not China Export, but it is known where the device comes from ...

Greetings.

Hello.
Since it has been said a , it would be appropriate a , or even b Small report for posterity.
The switch has arrived, mounted in the switchboard for a good few days. I ordered the 25A version with metering, such as shown in the first picture in post #1. I hope the Chinese amps will "do the job" since the overcurrent protection is 16A. I bought one module for the time being, as even with a 2-phase power supply to the board it is enough to disable ("reset") the control. I mentioned in a previous post. My doubts from the first post about the connection of the neutral wire were also clarified. It turned out that the "N" input and output are permanently connected inside the switch. This is even drawn on the front panel, I had not noticed when looking at the offer.

N output side in my case I left unconnected of course. There are even versions of similar modules (I already noticed after ordering) that do not have N on the output. That is, you can see right away that all switching and current measurement takes place "in phase" and the neutral is only used to power the device. Example:

https://pl.aliexpress.com/item/1005003989276139.html

Well, the switch just... works. It seems to meet my expectations. I just configured it to always set itself to "ON" after a power failure/recovery, and always apply power to the board in that situation.
Because the module has a power/voltage/current measurement, I have tried a little as an exercise to create scenes in Tuya that will switch off the hob after a certain time after switching it on (for now I am starting to play "with these blocks" in general, i.e. smart-house elements in general) . My induction hob does, admittedly, have factory safeguards of this type, but they are dependent on the power setting. At maximum power and user inactivity it will heat for 1h, at minimum 6h. Regardless of the power setting, I would like to limit the time to, for example, about 1.5h. An interview with a person who uses most frequently showed that such a time is very rarely exceeded, even when cooking on "low heat".
While the first tests still on the workbench with the light bulb were promising, unfortunately not so much with the actual load, as I expected. The point is that induction works on an "impulse" basis, in the sense that the average power is achieved by alternately switching the heating on and off. Similar to an iron or oven. In such a system, the switching on and off of the hob is detected repeatedly during cooking. However, for the time being, I have made a simple scene that detects the power consumption and sends a notification to the phone. And the fact that it sometimes does this a few times while the hob is running - hard, I don't mind. At least for now
Here as a curiosity: as I mentioned several times, the module is installed on one of the phases, so it measures/controls the power of half of the hob (two fields). However, I noticed that if I start heating on the fields connected to the other one phase, i.e. theoretically not covered by the measurement, nevertheless the module starts to show power in the order of a few dozen watts. That is, in this case too, I get the information that the board is on, something is happening. And that is enough for me

Finally: I realise that the idea and application is rather niche. I may never have to use the remote shutdown option (hopefully). On the other hand, the implementation is simple and at a relatively low cost, circa £65. A few years ago, it would have been perhaps not impossible to do "something like this", but certainly more difficult and expensive. And almost certainly not of this size and mounted on a standard DIN rail.

Footage of the module in the switchgear:

Screen from the application, when both fields of the phase board controlled by the module are switched on to maximum. As you can see the power is .