Various Cutler Hammer circuit breakers and Westinghouse circuit breakers are ideal for scenarios explained above. Despite the MV/LV X-formers being installed you’ll always want to check the pole to volt ratio to make sure you’re getting the proper product for the right panel board. Molded or insulated case circuit Breakers should be bought knowing full well you’ve got quality reconditioned equipment. Just remember to check any and all fusible switches to ensure proper operation. The bottom line is choose the right circuit breakers instead of half baked fuse solutions like electrical engineering just mentioned.