Beiträge von ChromeSKull

Hello Everyone,

I have just updated to 0.11 stable and glad to see the scripts no longer crash at startup, which is great.

However, I have found the 4PM pro has been struggling to switch the contactors we have reliably.

9 times out of 10, I have no issues, the shelly buttons trigger it correctly, scrips and switch them and even manually controlling it on the Pro's own screen works fine.

However I will sometimes get a fault where after switching off the contactors, the Shelly will not switch them back on, even though it displays ON, no wattage is shown and the contactors are not energized.

The only way I have been able to fix it so far is to reboot the Shelly 4PM Pro, and the contactors are then able to be energized, showing 1.5-2w per contactor.

Has anyone else had this issue?

The 2 contactors are on separate channels of the shelly 4pm (single phase) controlling 2 separate banks of LED lamps (20x 150w Lamps and 10x 150w Lamps).

I noticed more problems switching them all on at the same time, so I have set it up by script instead to switch 1 bank directly, and the other bank checks every 5 seconds then switches them on if demand was requested.

Again switching off is never an issue, its turning them on.

Does this have the KVS from the Beta firmware?

Zitat

Wonder what you want to catch with this „sanity check“?

It was to double check the load of the LED low bay lamps. The drivers are marked up 150watt, however the shelly 4pm displays only 75watt usage when at max brightness (built in motion sensor dims to 10% when no motion detected).
So I compared it to a 20watt LED lamp and that showed 21.3watt so within a margin of error. probably as the voltage was shown as 237v at the time.

If the Shelly is correct, that would mean I would only have a potential load of 10A or 2.25kw.
It will be split by at least 2 channels as the 2 sides of the warehouse are split with racking in between and one side is storage, the other is active space.

Hello,

is there a way to determine inrush current?

I'm planning to use a shelly 4pm to switch 30x 150watt LED lamps

When I connected just the 1 LED Lamp it displayed 75watts on the shelly but the driver is labelled 150watt.

My real question is, will the shelly 4pm be safe to use without a contactor as long as I split the load across 2 or 3 channels ?

currently the LED's are on 6 Separate fuses and 2 of them are on different phases (I know I would have to disconnect them and put them on 1 phase only.)

decided to do a sanity check, Fitted a 20watt lamp onto the 4pm and its showing up as 21.6w.