In the design of automobile circuit, the types of fuses include fuse, easy capacitance wire and circuit breaker. The specific use environment is as follows:

1) Fuse

        The protective element of a fuse is a fuse, which is connected in series in the circuit it protects. The fuse is a disposable device. Attention shall be paid to its use: after the fuse is blown, the cause of failure must be found first. And completely eliminate it. When replacing the fuse, it must be the same as the original specification. In particular, it is not allowed to use a fuse larger than the specified capacity, otherwise it will lose its protective effect. Poor contact between fuse support and fuse will cause voltage drop and heating. Therefore, pay special attention to check for oxidation and dirt. If there is dirt and oxide, it must be polished with fine sandpaper to ensure good contact.

2) Fusible link

        Easy capacitance lines are usually connected to power lines and lines with large passing current to protect the overall line or more important circuits.

3) Circuit breaker

        The circuit breaker is used in the circuit that is easy to overload during normal operation, and its principle is to separate the contacts by using the bimetallic sheet to be heated and deformed. There are two main types of circuit breakers: 1. Self recovery circuit breaker: automatically cut off the overload deformation, automatically reset after cooling, and so on until the circuit is not overloaded. 2 Press the recovery circuit breaker: after troubleshooting, press the button to reset manually.