Final answer:
Devices like fuses and arrestors are used to protect electrical systems from faults in transformers. These safety components act as automatic switches, interrupting excessive current to prevent thermal hazards. Electrical safety systems also include other devices for additional protection against shock and thermal hazards.
Step-by-step explanation:
The devices used to protect the electrical system from faults in such equipment as potential transformers or power transformers are b. Fuses and arrestors. In electrical systems, both fuses and circuit breakers are employed to interrupt excessive currents that can create thermal hazards. These protective devices act like automatic switches, opening the circuit when sustained current exceeds the desired limits. They help in preventing thermal hazards by stopping the flow of high-voltage electricity, and in case of circuit breakers, they might use insulating gas and jets of gas to blow out sparks that can occur when trying to interrupt high-voltage currents.
Moreover, electrical safety systems and devices such as the three-wire system, ground fault interrupter (GFI), and isolation transformers are crucial for guarding against both thermal and shock hazards. They create a safer environment for interacting with electrical equipment and reduce the risk of accidents due to faults or unintended current paths.