Fuses and Circuit Breakers
A bus bar is used as a terminal in the aircraft
electrical
system to connect the main electrical system to the equipment using electricity as a source of power
this simplifies the wiring system and provides a common point from which voltage can be distributed throughout the system
fuses or circuit breakers are used in the electrical system to protect the circuits and equipment from electrical overload
spare fuses of the proper amperage limit should be carried in the aircraft to replace defective or blown fuses
circuit breakers have the same function as a fuse but can be manually reset, rather than replaced, if an overload condition occurs in the electrical system.
Circuit breakers and fuses provide a means to protect the sensitive electrical equipment from
current
spikes that would otherwise damage the component. Both a circuit breaker and a fuse are designed to break the circuit if a particular current load is reached. The primary difference between the two is that ...