Cannot find info on this unit.
By the sound of it you have a thermostat that has an internal heater. This is used to give lower lower dry temps when turned on it switches the thermostat off more often. Usually it is about 6000 ohms.
If drum starts to turn, then shortly after the breaker blows could be your heating element is sagging. As it heats up it sags more touches the case and blows the breaker. It cools then returns to where it is no longer shorting out.
You could try disconnecting both wires to the heating element and measuring them to the case. Should be infinite resistance (open). But as I said it may not short to the case when cool.
Run it with no heat (Air or Fluff) cycle. If it runs OK this will eliminate the motor as a cause.