light flickering

Sorry if this topic is discussed before.
In one of our projects we have 1 cove light flickering when the light is off.
It is connected to dimmer channel(2A).
I connected a 50W bulb in parallel to the cove light, then the flickering stopped and started functioning desirably. I cannot place a bulb in parallel as a permanent solution, can you provide me a solution?
Thank You

 

Hello New123

Is it an LED fitting?
Maybe post the details for other peoples reference.

Some solutions would be to use a fitting which doesn't have this problem.
Or use a relay output and lose the dimming.
Or use a relay output in series with the dimmer output.
edit (this is not suitable for Universal dimmers see below)

 

The most frequent cause of flickering on C-Bus dimmer channels is the use of LED lamps that are not designed for dimming, or are cheap/nasty.

 

when i used a 50W bulb in parallel, the problem is solved..

how can i use a relay output in series with dimmer output???
from one relay channel to dimmer channel and then to led cove light???

 

edit (this is not suitable for Universal dimmers see other posts)
Since the dimmer output is always going to have some voltage, go from the dimmer output then through a spare CBus relay.
I havent actually tried this but I'm sure the CBus relay output will stay on while dimming until the value is 0.

So to try it you could simply address a relay output with the same address as the cove light you are dimming then watch its operation.

 

Ok thanks. I will try it.
But once I tried from relay output through dimmer output, but the dimming function didnt work. When I tried to dim the light got off, i.e,it gets on and off only.
Does the connection I made above make any difference with your connection??

 

Is it possible you tried to connect the output of a DIN Universal dimmer through the relay instead? The method DarylMc suggested is only suitable for use with the C-Bus DIN Leading Edge model dimmers. If you try to do this with the C-Bus Universal dimmer you will experience a variety of issues, however the C-Bus Universal does have a much wider compatibility with LED lighting products to start with.

The other things to check are that the turn-on threshold for the relay unit is set to the default and that the button on the switch is correctly configured as a dimmer button.

 

Hello Newman

Thankyou for correcting me on that.

I was thinking of the 8 channel leading edge dimmer.

Since new123 was considering to try and switch the active supply to the channel I assume he must have a Universal dimmer.

So it is on record can you describe why the Universal dimmer will have problems if a dimmer channel output (or input) is switched?


Thanks
Daryl

 

It takes a few seconds for the channel to start once mains is connected to it. The bleed current through the load in the off-state powers the channel, not the mains connection on the left-hand end of the unit. If you connect it in series with a relay channel you will see that it takes several seconds for the channel to turn on, which is quite annoying. This is because connecting a relay in series completely powers down the channel in the off state, meaning it needs to re-initialise when the relay contacts close.

 

When installing a dimming module into an LED application, such as LED lighting or LED signs, system developers might be surprised to find that the LEDs, which used to work fine, suddenly begin to blink or flicker. Frequently, this blinking and flickering issue is caused by a mismatched design between the LED application and the LED power supply. Due to the multitude of different LED applications, some will exhibit capacitive loading and some will have inductive properties while others will act like purely resistive loads.