I've got a Tech Lighting monorail system with one of their mini-transformers. It's a low voltage system, and the transformer is good for 300 watts. I've had 2 of the transformers "burn out" already. Tech did replace them, but I don't know what to do if it happens again. I've all the fixtures tested to be sure there isn't a short in any of them, and I'm running less than the allowable 300 wats.

Has anyone else had any experience with this?