Shelly 3EM - Powerfactor calibration

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  • Hello,

    i use 3 Shelly 3EM

    1 for the Photovoltaik (3P)

    1 for the house usage (3P)

    1 for the electricity meter (3P)

    the one for photovoltaik use PF ~ 0,95-0,97 wich seems to be okay (same as the photovoltaik systems shows)

    the other two use PF between 0,5 and -0,2 wich is not correct. The Amper is correct, so i need to adjust the PF. But how ?

  • Welcome to the forum!

    Low and obviously implausible power factor is often caused by

    (a) A lot of electronic power supplies which are poorly PFC compensated, or

    (b) Incorrect installation of the current clamps in relation to the voltage measuring terminals (VA, VB and VC).

    Each current clamp (A, B, C) has to be mounted at a wire with the same phase at the voltage measuring terminal (VA, VB, VC).

    Very usefull hints for the installation of Shelly 3EM is to be found here:

    Gast10
    25. Oktober 2020 um 14:11

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