Why does Electrolux hob oven trip circuit breaker?

When I turn my oven on, it trips all the circuits in my flat, even though all the hobs still work fine. The instruction booklet says I should check the RCCB has not tripped, not sure what that means. The oven is fitted in the flat so there is no 3 pin plug that I can take apart to test the fuse. There is a 3 pin plug socket on the wall, and beside it is a red switch saying 'Cooker'. Can I take this apart safely and see if there is a blown fuse inside? Any other advice?
Model is Electrolux EHE 684