Where is the safety trip on the electric oven?

An RCD tripping points to an earth leak because that is what they are designed to do.
Check the wiring and pay special attention to the insulation.

It's tripping because to much amperage is going to it, this tripping is a safety to let you know you have a problem.

Check the element. It should be smooth all around, no "bubbles". If it is, either the wires that connect to the element are shorted, or your "high limit" a safety that keeps oven from overheating has tripped. If you call factory, have model and serial numbers.Not a hard fix. Electrical knowhow is a must. TURN OFF BREAKER BEFORE REPAIRING!

as an appliance engineer sometimes the oven element can be at fault, although this always the case, it could be the thermostat also as they are both interplay when the oven is heating up, they could both be tripping the RCD as the earth is detecting that electricity is becoming live due to a component leaking electricity.
you could try replacing both of them with caution (turning the electricity off in the house ect.. using safety equipment)

a good site to use for those components is the following;

Spare Parts Accessories for Electrical Appliances QuickSpares

usually if they don't have the item in stock on the website you can use the contact option and they usually respond pretty quickly and let you know if they can get the item ( most likely )

Electric grill most often uses heater element to heat up.Maybe your heater elemen is shorted to oven body thus tripping the safety device.
Check your grill system using insulation tester.If the insulation is low check the heater elemen insulation and if defective replace them.

Bad SSR relay. Thermostat is for safety so it tripped first time, however since it's mechanical thermostat( not so accurate ) it didn't tripped on time for next time when it overheat

Good morning, try plugging the unit into a regular outlet. GFI outlets are notorious for tripping when used with large appliances. They are very touchy for safety reasons. A large current draw could be interpreted as a short and will trip. Hope that helps.

There is no reset button on this model.

Check to make sure your circuit breaker is not tripped in the home.

There are internal safety thermal devises that could have tripped or the main control board gone out.

yea,, assuming you were self cleaning when this happened?? something got to hot and tripped the oven safety thermostsat(most likely) hte unit would have to be pulled out from wall for hte thermostat is located behind unit on back wall.. did you ck the circuit breakers, its a double perhaps 1 is tripped?

This is ovenmad from the previous post. I had a repair guy come out and he found the problem to be the Safety Thermostat. When tripped, this allows everything to work on the oven except the elements. He did not have the part with him so will return in 6 days to replace it. That should solve the problem. No idea why it tripped. The safety thermostat is located on the rear of the oven so we will have to pull out the oven to replace the thermostat. Again, this was a Frigidaire Single Electric Wall Oven made in 2004. Hope this helps somebody else.