It has an electrical fault and needs attention.
The trip, if it takes out all the power in the house will be the RCD and will be caused by a leakage of mains power to earth - a short somewhere.
One way to diagnose the failing component - if it's not easily visible - is to disconnect each component in turn until the fault goes away.
A specialist appliance engineer will be able to track the fault down relatively quickly. Do not attempt to use it until it's fixed - there's a safety issue.
Good luck...
Peccavi
January 2010
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix tumble dryers.