3-phase question

We have a 3-phase installation in our house, so in a normal way I think I'll need 3 OEM's to measure the complete power usage.

BUT, we have 3 live-wires coming in and only one neutral-wire going out.

So would it be enough to only put a CT-sensor on the neutral wire to measure the complete power usage?

Robert Wall's picture

Re: 3-phase question

No. Read the article on 3-phase in Building Blocks. That will tell you why.

If you want an accurate measure, you need 3 emonTx's. If you are content with an approximation that might be good enough for you, then you can use one emonTx and the 3-phase sketch. The comments in the sketch explain the limitations.

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