4 Advice to Choose a 3 phase power monitor

Thank you for all the anwsers!
1. I actually meant Heat Pump, the one with the outside and the inside unit, that heats the radiators in the house.

2. I belive it is connected with three phases with no neutral ( I can only see the three wires with 16A 400V fuses), but I'll have to check. Would measuring the power still be possible without the neutral wire, if I were to use those, since they only handle 250v? If yes, how would I connect it?

3. I have no intent of switching off any of the devices, only use them for measuring the power.

4. I found ordered a bundle of 3 of them already. I saw on a couple of videos, that you can flash the chips inside, so they send the information (Voltage, amperage and freqency) to your server and you can use that to make graphs or whatever you please. I think It would be a fun project and measuring the power consumption of that Heat Pump was just something I thought of, since I am interested how much it actually spends in those really cold days vs on milder days. Of course I would only begin wiring up those after extensive testing with large loads ( I mean they are pretty cheap so I need to make sure, they can handle the rated power ) and after setting up the server and graphs and everything.

So my main question is , If it is possible to measure three phase power with those, and one per phase and how would I go about wiring those up.

Thank you for your anwsers

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There was a device put out by clipsal Australia called cent-a-meter.

Wireless transmission from tx to rx at around 30 metres.

Was available as a 3 phase unit but not that common.

Easy install, a "split" ct clipped over the main incomer active and a couple of AA batteries.

Amazing really as most Australian installations are an all metal meter box where the tx was fitted and yet seemed to get good range. Most would sit the receiver/readout on top of the frig inside the house.

If you are looking for more details, kindly visit acrel.

Haven't seen them lately but surely Clipsal were not the only ones to have come up with this idea.

PDF below.

It was a novelty thing at the time offered by the Aus Gov. where one would pay $50 and a lecky would come out and fit the unit along with 3 or 4 "efficiency" fluro light bulbs.
Worked fine but people being what they are, and government people not having the foresight, the batteries were never replaced in the tx unit.
AND why would they when in most instances it was in behind the main metering panel so for one, they probably didn't know it was there, and two, for those that did, most weren't prepared to go digging around behind a panel with single insulated cabling and good possibility of getting an electric shock.
Gov never gave them any spare batteries anyhow....

https://www.energymatters.com.au/clipsal-centameter-energy-monitoring-device-p-924.html

Cent_a_meter.pdf (425 KB)

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