Circuit breakers and disconnectors are two important pieces of equipment in the power system, and they have significant differences in function and use.
First of all, the circuit breaker is mainly used to control the on/off of the current. When there is an abnormal current in the circuit, such as an overload or short circuit, the circuit breaker will automatically disconnect the circuit to protect the circuit and equipment from damage. In addition, during normal operation, the circuit breaker can also be manually controlled to turn the circuit on or off. Therefore, the circuit breaker has the function of overload protection and short-circuit protection, which is an important safety guarantee equipment in the power system.
In contrast, the main function of an isolation switch is an isolation circuit. It is able to disconnect or turn on the circuit so that the live and uncharged parts are isolated from each other. Disconnectors can be used to isolate the power supply and keep workers safe when overhauling or maintaining equipment. Disconnectors can also be used to change the way the grid operates, for example by switching one line to another.
To sum up, although circuit breakers and disconnectors are both important devices in the power system, their differences lie in their functions and uses. Circuit breakers are mainly used for current control and protection, while disconnectors are mainly used for circuit isolation and changing the operation mode of the power grid. In practical applications, these two types of equipment are usually used together to ensure the safe and stable operation of the power system.