What types of loads are sheddable using shunt-trip and feeder CBs?

The correct answer is non-vital loads because these loads are not essential for the immediate operation and safety of a facility or system. Shunt-trip breakers can be used to disconnect non-vital loads in order to preserve the integrity and functionality of the power system during conditions when load shedding is necessary, such as during system overload or fault conditions.

By selectively shedding non-vital loads, the system can ensure that the vital and critical loads remain powered, which is crucial for maintaining basic operations and safety. In contrast, vital, emergency, and critical loads are necessary for the essential functions of a facility, requiring continuous power supply and are therefore not suitable for disconnection via shunt trip and feeder circuit breakers. This strategic approach allows for effective management of electrical resources while prioritizing safety and operational continuity.