We have an Ikea low voltage lighting system in the kitchen. It's made up
of the mains transformer, which is affixed to the ceiling, and two
long lengths of cable runing along the ceiling, connected to the
transformer by two short lengths of cable.

It's worked fine for 3 years, but now the transformer keeps tripping out
after 5 minutes. We've moved each light a little way along the cable to
discount bad connections, and replaced the two short connecting wires
(the sheathing had become blackened with heat), but it hasn't fixed the
problem.

There are six 20watt lights on the system which is rated at 140watts, so
over loading with lights isn't the problem, although it does stay on a
little while longer if we use fewer lights.

ANy ideas what the problem could be?

Stone Cold wrote:

We have an Ikea low voltage lighting system in the kitchen. It's made up

It's worked fine for 3 years, but now the transformer keeps tripping out
after 5 minutes.

ANy ideas what the problem could be?

check the transformer has some airflow for cooling. Otherwise replace
transformer.

NT