When you say "trips the fuse box" i take it you mean it trips an Earth Leakage Circuit Breaker, either for that circuit or the whole fuse box.
Any number of things could cause this, possibly a damaged motor within your dryer that is heating up after a couple of minutes and then the insulation is breaking down. GET PROFESSIONAL HELP. SOMEONE WHO KNOWS WHAT THEY ARE DOOING. NOT SOMEONE WHO THINKS THEY KNOW.
PETE, July 2008