Shelly PRO 4PM overcurrent reactive power

    Hello,

    When I turn on kettle and microwave oven in my kitchen, the microwave oven creates current splash (for about 50 milliseconds) at start and then power goes down to normal consumption approx 1000W. The kettle is clear active load with power 2000W. So the summary power is 3000W, which doesn't exceed 4 Pro power limit.

    I have one suggestion to fight with power splashes when some device starts to work. If it was possible to enter the time (for example 500 msec is enough) in device channel settings, how long the the overcurrent occurs, and if overcurrent lasts more than the value set in device channel options, then switch the channel off with status "OVERCURRENT". Maybe it's possible to implement it in the next firmware release?

    Sorry, if the problem is already solved, bit in that case I would be thankfull, if point me to solution.

    You have made the request of the millennium! I hope shelly hears your prayer, and attends to it

    Currently shelly PRO does not support tolerance, preventing it from being used in a professional environment. In my case, the problem reoccurs from time to time, without a temporal pattern. But when it happens, it always coincides with the start of an air conditioner.

    overcurrent.png


    Note that after 1, 4 and 6 (overcurrent) the system measures 0 watts for a very short time, 5 seconds to be exact. This is because a program external to the shelly automatically resets the relay. This saves my life! But obviously, it is not a good solution.

    I've tried RC snubber, shelly's own, and others alternatives. I have put ceiling Fan Capacitor CBB61 1,2UF 250VAC, but the problem persists. I do not give up, and I continue to do all kinds of tests daily.

    I have an environment with 50 PRO shellys installed (and another 100 waiting) and it is frustrating that the manufacturer does not provide a solution to a product marketed under the PRO line.

    In my opinion, Shelly PRO it's a great product, but the fact that it does not support even the slightest tolerance makes it unusable in certain environments where there are motors, especially air conditioners.

    Einmal editiert, zuletzt von jgrau (9. August 2022 um 20:53)