Electrical switching equipment

Find a book on factory power supply and take a look; this is all basic knowledge, very simple

The differences in function among circuit breakers, load switches, and isolating switches are as follows: 1. A circuit breaker is a switching device that is capable of closing, carrying, and breaking current under normal circuit conditions, as well as of closing, carrying, and breaking current under abnormal circuit conditions within a specified time frame. Circuit breakers are classified into high-voltage circuit breakers and low-voltage circuit breakers based on their area of use. The boundary between high voltage and low voltage is somewhat vague; generally, devices with a voltage of 3 kV or higher are considered high-voltage electrical equipment. 2. The operating process of the load switch is as follows: during opening, under the action of the opening spring, the main shaft rotates clockwise; this causes the piston to move upward through a crank-slider mechanism, thereby compressing the gas ； On the other hand, through a transmission system composed of two sets of four-link mechanisms, the main switch blade is opened first, after which the arc-extinguishing switch blade is pushed to open the arc contacts; the compressed air in the cylinder blows out the arc through nozzles. 3. Disconnector: that is, in the open position, it provides an insulation distance between the contacts that meets the specified requirements as well as a clear indication of disconnection ； A switching device that, when in the closed position, can carry the current under normal circuit conditions as well as the current under abnormal conditions (such as a short circuit) for a specified period of time.