Minimum load with K8028 dimmer kit

Kits General
1

Hi everybody,

I am planning to buy this K8028 dimmer kit from your company. I was wondering is there a specified minimum power load value, for example if someone would like to use a lamp with very low power. The data sheet only specifies the maximum load value. For example, high efficiency dimmable LED based lamp 8W power designed for 230V, 50Hz would be the ideal candidate for this sort of question. Would the K8028 work with this lamp? Or, if I reformulate my question it doesn’t have to be a dimmable LED based lamp, it can be a regular old fashioned incandescent lamp of 8W total load, 230V, 50Hz. Will the K8028 work in this situation? Another question related to K8028, in which quadrants is the output triac working considering the attached electrical schematic of K8028? Thanks for your answers.

Regards,

Sandro Runjic

2

For correct and reliable operation under all circumstances, we’d recommend a minimum resistive load of at least 40W.

3

I have the K8028 working together with a motion sensor, the light has 3 E14 sockets.
The system works very fine with regular light bulbs, I tested it down to 1x 15 watts (oven bulb).

Now I replaced the bulbs with LED dimmable lamps (3x 6 watts). The dimming function is doing quite good (no flickering, quite smooth dimming). But the lamps are never switched off completely. This already happens after 2 seconds when I apply a voltage to the K8028. The lamps are burning at about 5-10%. The more lamps I put in the lower they burn, they are sharing the power. If one lamp is exchanged with a bulb (e.g. the 15 watts) the bulb and the remaining LED lamps switch off completely.
Is there any electronic part I can exchange that the LED lamps are switched off completely?
Other solutions:

  • Use one (low power) bulb parallel to the LED lamps. I found one with 3 watts (E14) but not sure whether it will work.
  • Put a staircase lighting timer in a row just before the light.

One thing I am wondering: I checked the complete energy consumption of the K8028 including the load with a good energy monitor. The consumption is:

  • 1 W if no load is connected --> seems to be correct
  • 16,5 W with the 15 W bulb switched on --> correct
  • 18,5 W with the 3x 6 W LED lamps switched on --> correct
  • 1,3 W with the 3x 6 W LED lamps switched off --> Does not seem to be correct. Is it possible that the consumption of the LED lamps is just 0,3 W when I can seem them shining quite good in a dark surrounding?