Shelly (PRO) 3EM

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    • Autor

    The Shelly 3PM seems to be dependant on N - neutal for operational Power. In the Norwegian 230V Grid Neutral is not available -as we are using the IT Net principles - with Insulated Terra. There shall be no current going to Earth. In thre phases we are getting our power between L1 & L2 / L2 & L3 /L3 & L1 - and no current are allowed to pass to Earh - which is Protective Earth.

    I just boughet 4 of these for Energy Measure - Am I stuck ? - cannot use in Norway with IT Grid !! ??

    Please, help: How to use the Shelly Pro 3EM ?

    Can the Shelly be modified ?
    Will we se a new version for IT Network - Isolated Terra ?

    But between L1 and L2 are 230 Volt ?

    On the other hand,a voltage measurment is missing.

    Man muß nicht alles wissen,sondern nur,wo man es nachlesen kann.

    Einmal editiert, zuletzt von Rickals (15. Dezember 2025 um 02:38)

    In such cases (similar to Belgium) with three phase 230V mains networks, one phase has to be seen as virtual neutral. Thus, we’ve transferred the network to a two phase 230V with neutral. Two current transformers are sufficient for a power and energy measurement.

    A link to an appropriate thread in the international forum:

    https://community.shelly.cloud/topic/9408-wha…/#comment-30166

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