The structure and function of the load switch

The structural characteristics and functions of the load switch: The high-voltage load switch is a high-voltage electrical appliance between the high-voltage isolating switch and the high voltage. It is similar to the circuit breaker in performance and similar to the high-voltage isolating switch in structure, with a clear disconnection point.

The high-voltage load switch has a simple arc extinguishing device, which can connect and disconnect the circuit under the conditions of rated voltage and rated current. However, since the arc extinguishing structure of the high-voltage load switch is designed according to the rated current, it cannot cut off the short-circuit current. When the high-voltage load switch is used in conjunction with the high-voltage fuse, the normal load circuit is opened and closed by the high-voltage load switch, and the short-circuit current is disconnected by the high-voltage fuse. The combination of the high-voltage load switch in series with the high-voltage fuse is often used in small-capacity distribution systems of 10kv and below.

Function: The high-voltage load switch is similar to the high-voltage isolating switch in structure, has a clear disconnection point, is similar to the circuit breaker in performance, and is a high-voltage electrical appliance between the high-voltage isolating switch and the high-voltage circuit breaker. It can open and close the load current within its rated current range and cut off a small overload current. It cannot open and close the fault current. After being pulled open, there is an obvious disconnection point, which can isolate the electrical appliances. It can be used as a switch point for small and medium-capacity equipment and lines, and can be equipped with a high-voltage fuse that can disconnect the fault current.