Downlighter repeatedly blowing???

HarryDog

Hi all, I installed new downlighters in a converted attic. Four are in the main room and run through a dimmer. No problem with these. The other two are in the landing and are on two way swiches at each end of the stairs. One of these lights has blown 3 transformers. Each took about a week to 2 weeks to do this. I then replaced it with a GU10 lamp. This has also blown after 2 weeks. There is insulation up there but I left space for cooling. Altogether the 6 lights are on one circuit and there is a smoke alarm on it aswell. From what I can see steam or condensation is not a factor, insulation is not a factor. I used robus trafos. The attic is hardly used. The other 5 lamps and trafos haven't given a problem. I'm at a loss with this one. Any crazy suggestions appreciated.

M cebee

dunno how you can be 'blowing' all those robus trafos


they're supposed to be quality with overload/short-circuit and thermal protection

bertie1

I have seen this happen with the low voltage transformers when they are put into an attic space with a slope in the ceiling . They roll or move slightly into the insulation when you are putting back the lamp fitting then trip out on overload because they are too hot

M cebee

maybe the trafos were covered with thermal insulation then

assuming there's a trafo per light and no faults


not much of that nonsense now with gu-10 led

HarryDog

Thanks for replies. They all have their own trafo's. I pushed the insulation out of the way when the first one went. I agree with putting in a gu10 led but think there must be some reason for this. We all get bad trafo's or lamps from time to time but this is taking the p**s.