- Feb 02, 2018 -
The same point is to achieve short-circuit protection, the principle of the fuse is the use of electric current through the conductor will make the conductor fever, to reach the melting point of the conductor after the conductor melts so disconnected circuit protection with electrical appliances and wiring is not burned. It is a cumulative heat, so it can also achieve overload protection. The melt will be replaced once the melt is burnt.
Circuit breaker can also achieve the circuit short-circuit and overload protection, but the principle is not the same, it is through the current bottom magnetic effect (electromagnetic release) to achieve the circuit breaker protection, through the thermal effect of the current to achieve overload protection (not fuse, many do not replace the device). In practice, when the electric load in the circuit is close to the load of the fuse, the fuse will be heated gradually until it is fused. As said above, fuse fuse is the effect of current and time together to protect the line, it is one-time. While the circuit breaker is a sudden increase in the electrical current, more than the load of the circuit breaker, will automatically disconnect, it is an instantaneous electric current increased protection, such as when the leakage is very large, or short circuit, or instantaneous current when the protection of large. When you find out why, you can continue to use the closing. As mentioned above, fuse fusing is the result of the interaction between current and time, and the circuit breaker, as long as the current through its set value will trip, time effect can hardly be considered. Circuit breaker is a common component of low-voltage distribution. There are also parts where fuses are suitable.