ELV DOWNLIGHTERS STRANGE NOISE

[davphi338]

Hi,

I have some ELV downlighters fitted in a bedroom, they are switched by a dimmer. When the lights are turned on there is a strange noise ( like a slow whistle for want of a better phrase). When the lights are off there is also a faint noise although it doesn't appear to be coming from the dimmer. I have checked the downlights are they are each on individual transformers (20-60 va). The dimmer is a remote control type and is suitable for dimming low energy lighting.

Has anyone experienced this problem before and is it more likely to be a problem with an individual transformer or the dimmer unit.

Thanks

 

[Adam_151]

Are the transformers suitable for dimming?

 

[Albert]

Is the dimmer has the correct load capacity? do not forget that for transformered lights you need about 1.8 factor...

 

[electronicsuk]

Agree with Adam, just because the dimmer is suitable for use with inductive loads it does not mean the transformers in the fixtures are suitable for dimming.

 

[davphi338]

The transformers are these from screwfix:
http://www.screwfix.com/app/sfd/cat/pro.jsp?id=48058&ts=45406

and the dimmer is this:

http://www.tlc-direct.co.uk/Main_In...Accessories~Dimmers_5_Satin_Chrome/index.html

So I think they should be compatible for dimming.