CPL with differential meter in the middle???

Question

Hello,

I would like to connect two PCs via a powerline installation behind my Livebox. So far, nothing complicated, I've bought the gear, I've plugged it in, and it works.

Except that part of my house is electrically separated behind a differential meter (extension of the house). It turns out that the powerline doesn't work in that area.
Is this because the meter cannot be crossed? If so, is there a way to bypass the problem? Are there any specific devices needed in this case?

Thank you in advance.
Alain.

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Nabla's · Answer

Hi.

In this tutorial, I talk about a phase coupler made with simple capacitors.

The capacitor behaves like an open circuit at low frequencies and like a closed circuit at high frequencies.

I think that if you connect the capacitor in parallel with the meter (one capacitor for each phase), then the high-frequency signals from the PLC should pass through, and the majority of the electrical signal (the power, that is) at low frequency should pass through the meter just fine.

That said, be careful. The functioning of the meter could be more or less distorted (underestimation of consumption). I don’t think the difference will be significant, but who knows... If you are subletting and the second meter belongs to the tenant, then I would advise you to connect two conventional PLC adaptors together (one before the meter, the other after, and a crossover Ethernet cable between the two).

brupala · Answer

Hi,
differential circuit breaker ... you mean differential switch, right?
In that case, are you talking about the EDF differential (300mA) or the one in your electrical panel (30mA)?
A circuit breaker in the panel doesn't normally stop WiFi signals, but it certainly weakens them (inductive windings) and if that adds up with other signal weak points, it can prevent proper functioning, of course.
It's worth noting that powerline communication (PLC) is not a technology with certain operation as it's too dependent on the environment.
--
And ... There you go!

colossusfr · Answer

Good evening and thank you for your answers.

Sometimes I drink.... :) Yes, of course, it's a differential circuit breaker from the panel and it's just a simple 30mA that shouldn't be an issue. But it still doesn't work. I am at the end of the installation and maybe I'm reaching the limits..

Any miracle idea??

Thanks again.
Alain.

Nabla's · Answer

If it's a circuit breaker, I don't think it's wise to proceed with the installation of the capacitors I mentioned. Normally, the circuit breaker shouldn't cut the signal. If that were the case, after confirming that it is indeed responsible for the problem, I would opt for the installation of 2 PLC boxes: one just before the circuit breaker, the other just after, and connect them with a crossover cable. But normally it's unnecessary.

CPL with differential meter in the middle???

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