I live in Ireland, on a 240V/50Hz supply. I run a Wink Hub, and therefore am bound to using US based Z-Wave frequencies, which usually operate on a 120V/60Hz supply.
I have an Aeon Labs Dimming Module, and have checked the components for suitability for 240V. The TRIAC is rated 600V. I have tested this on an incandescent lamp, and it operates fine; however, I am yet to test this on a LED luminaire to see if it flickers. I have been told a dimming device created for one regional frequency could flicker on another frequency (a 60Hz dimmer on a 50Hz supply).
My question is concerning the technical operation of the dimming feature. I can see it uses a TRIAC. The Z-Wave ZW0301 chip has a ZEROX pin (zero-crossing).
Once it has synchronised with a zero-crossing, it is my understanding that it waits a period of time before switching on the TRIAC until the next zero-crossing (known as leading-edge dimming). The amount of delay would be a function of the period/frequency, and the amount of dimming required. If the device was programmed for 60Hz, and was operating on a 50Hz supply - all I can fathom happening is that it would not have the same 'range' of dimming.
Why wouldn't a manufacturer simply use the zero-crossing to synchronise/determine the exact frequency of the line it is operating on; instead of hard-coding the device to either a 60Hz or 50Hz value?
So - the only issue I can see with flickering on LED luminaires would be due to the LED driver itself not drawing enough via its bleeder circuit to latch the TRIAC once it has fired. Which has nothing to do with 50/60Hz.
So when a manufacturer says 'compatible with most leading and trailing edge dimmers', I can only assume it is to do with the choice of L and C used on the dimmer - and whether or not the LED driver has an appropriately sized bleeder. Adding a few more LED drivers on the same line would probably resolve any of those issues though.
Any thoughts on my ramblings?