What type of protection is used for equipment like potential transformers or power transformers?

High voltage fuses are specifically designed to protect equipment that operates at high voltages, such as potential transformers or power transformers. These fuses provide a crucial safety function by interrupting the electrical circuit if the current exceeds a predetermined level, thus preventing overheating, damage, or catastrophic failure of the equipment. The design and construction of high voltage fuses include features that ensure they can handle the extreme conditions and high electrical stresses associated with high voltage operations.

In the context of transformers, which often handle significant electrical loads, it's essential to have protection that can effectively deal with fault conditions to prevent damage to both the transformer and other connected equipment. Additionally, high voltage fuses are tailored to operate reliably in these circumstances.

Other protection devices such as low voltage fuses are not suitable for high voltage applications due to their inability to handle the higher current levels and the different operational parameters of high voltage systems. Circuit breakers also provide protective roles, but they may not be as decisive in isolating faults in very high voltage scenarios compared to fuses. Current limiters serve a different purpose, focusing on controlling current flow rather than directly interrupting the circuit in response to overload conditions.