Shelly 1 fan control - Shelly unreachable after fan off

1. offizieller Beitrag

    Hi everyone,

    I am running a shelly 1 + Temperature Add-on to control a 230V fan.
    The fan is simply connected to N directly and O from the Shelly.
    To the Shelly there is no external switch etc. connected - so only N + L & I (where L & I are connected to the same WAGO via 1,5mm wire)

    This works as expected - Shelly is reachable, I can see the temperature from the Add-On and I can turn on the fan from the shelly.
    Unfortunately as soon as I turn off the fan, the shelly gets unreachable.
    The only way I can get the shelly back online is by removing the power supply.
    Afterwards it works again as expected.

    I think the problem here is that the fan still rotates shortly after I turn it off and instead of consuming electricity,

    might create it at that point in time. Based on this "overload" the shelly 1 stops working.

    Any idea what I can do to prevent this from happening?

    Thanks for your replies in advance.

    • Offizieller Beitrag

    Hi and welcome to the forum. :)

    You can switch a relay in between to decouple the inductivity of the fan from the Shelly.

    Good luck. :thumbup:

    I wonder how the current out of the fan during the bleeding could reach the Shelly: Due to the fact the contact between I and O is open (Shelly was switched off via command), the fan runs freely with no electrical connection to the live terminals of Shelly.

    „Habt Geduld. Alle Dinge sind schwierig, bevor sie einfach werden!“ (aus Frankreich)

    „Nothing in life is to be feared, it is only to be understood.“ (Marie Curie, 1867-1934)

    „Es reicht nicht“, rief Schiller, „Gedankenfreiheit zu fordern, man muß auch denken können, sonst fordert man Gedankenlosigkeitsfreiheit und die ist die Freiheit zur Dummheit, welche wiederum die schlimmste Unfreiheit überhaupt ist!“
    (Aus „Besuch aus Weimar“ von Gert Heidenreich, Schriftsteller, *1944 in Eberswalde)