If you already have a circuit breaker, for which you need to find a suitable "up stream protective device' that provides the "total selectivity.' This search activity over the catalogue pages will take you lots of time and also there is a possibility to miss the possible combinations.
Here is the solution for your problem statement.
The "Electrical Calculation Tools" has a module called "Search Selectivity," and this will help you to get the quick solution for your query. Let us see from this video how this works.