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Which of the following is the least expensive protection for overcurrent is a low voltage system?

  • Rewireable fuse is the least expensive protection for overcurrent is a low voltage system.
  • Rewireable fuses are simple devices that consist of a metal wire or filament that melts when the current exceeds a certain level, breaking the circuit and protecting the system from overcurrent.
  • Isolators, oil circuit breakers, and air break circuit breakers are more complex and expensive protection devices that are typically used in higher voltage systems.
  • Isolators are used to isolate parts of an electrical system for maintenance, while oil circuit breakers and air break circuit breakers are used to interrupt high currents in the event of a fault or overload.
  • The cost of a protection device depends on its complexity and the voltage level of the system it is designed to protect.
  • For low voltage systems, rewireable fuses are often the most cost-effective solution for overcurrent protection.