Electrical parts

hello, i need help to find fritzing parts like a differential switch, circuit breaker, electricity meter, off-peak contactor etc
can someone help pls ?

I doubt most of those parts exist. They can be made easily enough if you have data sheets for the parts you need. The place to start to see if there are parts is a google search of the form “fritzing part differential switch” which doesn’t turn up anything useful (as expected.) I assume you are looking for a pressure switch of some kind, but a data sheet for the part you want with size, connectors and mechanical drawing would be needed to make a part.