Dan Gravell wrote:


Not sure if this was a reply to me or not... the faulty set has one
switch, four lights, behind each one is a dimmer transformer. I don't
know what toroidal means.


The point is that inductive wound transformers break dimmers. Toroidal
is a doughnut of iron wound as a transformer. Its less likely to hum
than a standard Es and Is transformer.
So its used.

HOWEVER there is enough leakage inductance to spike MANY dimmers.

electronic transformers may or may not dim successfully at all.

What you need is

- dimmers that are specified for inductive loads, generally 'suitable
for LV lighting'
OR

*electronic* transformers that are specified 'to *work with dimmers*'


Or face the consequences you have. Presumably triacs blown to ****, and
either lights are on full all the time, or wont come on at all.

FIRST step is to say what exact dimmers and transformers you have.

The other possibility, and it happened here, is that you have a goofy
track system, and the contacts to it are corroded up.



Thanks for your help!

Dan