thgoebel

The power factor is - like voltage and current - a significant quantity in power measurement with AC systems. Please have a look at Wikipedia: https://en.wikipedia.org/wiki/Power_factor#Importance_in_distribution_systems

In this case (only one Shelly plus PlugS has a different behaviour) a faulty device could be assumed: One of the RGB LEDs could be defective, particularly if the red light is asymmetrically distributed around the transparent ring.

Inductor L7 is faulty. This is most likely caused by another faulty device: The step down converter BP2522. A sketch of the power supply shows the components: Very likely, the course of events is as following: Diode A7 gets faulty and produces a short circuit, which opens AC to the components beyond it. This damages the BP2522, which has a “buried” diode, and possibly the two electrolytic capacitors 4,7μF. Due to the high current, inductor coil L7 fuses. This should be the gentle duty of the fusible resistor 10Ω - but it is not very reliable… There exists a chance that a fluorescent tube in your premises has caused high voltage spikes during the start cycle, which may be liable for the faulty diode. Would recommend to look for those lights and replace it with LED lamps…

You‘re welcome! Please understand that I don’t want to comment your insights. I’m trying to live in both worlds…

On the bottom of the device are four latches which are keeping the base plate in place. Unlock the latches and remove the base plate. The innards are shown here: https://smarthome-forum.eu/forum/thread/18122-shelly-pro-3-teardown-stromaufnahme-und-betrieb-mit-kleinspannung/ I’m quite sure you’re able to read the German text… 😉

Wiring of the Shelly looks correct. Live and neutral are not interchanged, which would cause the zero power value. Hence I would assume a faulty device. Would propose to reject the device.

Please double check your sketch: It seems not to be consistent, cause the automatic circuit breaker on the left will not work correctly whilst connected at neutral potential.

This is a bug in the Shelly up, which prohibits the switching of the relays of Shelly EM and 3EM devices. Hopefully this issue will be amended soon… https://community.shelly.cloud/topic/1027-internal-relays-of-shelly-em-and-3em-not-switchable-via-appcloud/#elControls_5421_menu

Did you check the knowledge base yet? https://shelly-api-docs.shelly.cloud/gen2/ComponentsAndServices/Mqtt

Sorry - I‘ve no experience with Siri!

Please set button type to SWiTCH!

Unfortunately, KVS values are not to be altered via WebUI with FW 1.3.1. Data entry to KVS would be essential in scripts with energy counting to synchronise with electricity meters! Would appreciate to regain this feature!

To be honest: The cables are not swapped actually but now attached as intended. It was a wrong connection which caused the erroneous measurements…

Let us assume live and neutral wires are occasionally swapped at the „blue“ terminals of the Shelly pro 1PM: In this case, the Shelly would not detect a voltage which leads to zero power value… Addendum: It is very likely that live and neutral are swapped: