Beiträge von ErikBooij

  • Double Switch (Hotel Switch arrangement)

    Hi folks!

    In my apartment I've wired up 5 Shelly 1PM's and a Shelly 2.5 for the lights in almost all my rooms. I've got one Shelly 1PM left to go, for my hallway lights and they're configured in a hotel switch arrangement (not sure if this translates well, we call it a "hotelschakeling" in Dutch), where two separate switches operate the same light.

    I have seen wiring diagrams for this type of arrangement on a Shelly 1, but I'm not a 100% sure if I can blindly use that, since the Shelly 1 has dry contacts.

    Here's the situation (sorry for the crude drawings):

    One switch has a Live, switching into two separate wires of which one is always connected to live, both feed into the second switch, which has one output, going to the lamp. That second switch is where the Shelly will go (there's also Live and Neutral available from the adjacent wall socket).

    [Blockierte Grafik: https://i.ibb.co/KL0tNn4/existing-wiring.png]

    No the following are quite clear:

    O - The wire going to the lamp

    SW - The wire coming out of the switch (it'll be under 220V if either of the switches is ON)

    L - The live wire from the adjacent wall socket

    N- The neutral wire from the adjacent wall socket

    I'm only wondering about L1 really. Do I just split the Live wire and plug that in there too? Like the following?

    [Blockierte Grafik: https://i.ibb.co/2ZbbF9t/proposed-wiring.png]

    I'm just not entirely sure that makes sense.

    Thanks in advance for your time and effort!

    (I'm aware the switch needs to be configured as an edge switch)

  • Bypass blown - Reproducable

    Zitat

    Do you live in a rural environment? Outside a village, perhaps in a grange? Would it be possible that your premises is supplied with mains voltage by a transformer mounted on a pylon?

    Thanks for the quick reply! No not at all, I live in a city in an appartment building.

  • Bypass blown - Reproducable

    Hi folks!

    I have gotten acquainted with the Shelly product line recently and immediately went out and bought some. I have had a Shelly 1 running for a couple of days now (needed that one for the dry contacts) and the next step was to install some Shelly 1L's in my light switches.

    Yesterday I got the first one hooked up. Simple wiring with a single switch, controlling a light fixture with two 3W LED bulbs. It worked very well, firmware updated, configured, attached in Home Assistant, all was well. Until the bypass blew up. A fairly loud bang, and the main breaker tripped. That was a surprise. I triple checked the wiring diagram again and made 100% sure that I wired the things correctly. That conclusion also supported by the fact that the whole system worked fine for like an hour. I could toggle it remotely and physically, I could trigger my automations off of it, etc.

    I figured I must've had a bad bypass, but fortunately I bought two. So this morning I installed the other. I came to the unfortunate realization that not only the bypass had blown, but the Shelly didn't switch the current on and off anymore. I could still hear the relay click, the web interface was working, etc, just no light. I assume there 's a fuse inside that's also blown.

    Anyhow, I tried another 1L too. So a different Shelly and a different bypass to the first set that had blown. Again, it worked great. Didn't hook it up to HA yet, but I started trying different combinations of things. Turning it off from web, when the physical switch had turned it on, the opposite of that, etc. etc. All worked well and I was happy.

    UNTIL...

    I tried switching it on/off/on in quick succession via the web interface, and the exact same thing as the day before happened. A loud bang, breaker tripped and the bypass charred. Which makes me wonder, what's causing this? I see a couple of options:

    • I wired it incorrectly. This seems extremely unlikely, since it's not a complicated schema, plus the whole setup worked fine, until I flicked the switch in the web interface a couple of times.
    • I received not one, but two faulty units. This seems statistically unlikely, although I guess coming from the same batch, etc etc, it's not impossible.
    • There's a design flaw in either the hardware or the software of the Shelly that's causing things to short. On the one hand that seems unlikely, because I guess the devices and software are pretty thoroughly battle tested by now, on the other hand, I can imagine not a lot of people have tried clicking the web button 5-10 times in very quick succession. Is that a legit use case? No. Should the product be able to handle that without stuff exploding in my home? Yes, absolutely. I'm not completely sure, but I think I was doing something similar when the first one exploded, because I wanted to verify how Home Assistant would handle the switch flipping while the previous automation hadn't finished yet.

    So, I guess my questions are...

    • Do these symptoms ring a bell for anyone?
    • Is there another potential cause besides the three I've mentioned?
    • Has anyone experienced this before?
    • Is there a warning not to quickly switch the relay somewhere, that I missed?
    • Is there anything relevant t
    • hat I should know, but apparently don't?

    Thanks in advance for your time!