The load break interrupter switch has a simple arc extinguishing device, which can open and close the circuit with load, and has the function of self arc extinguishing. It can turn on and off a certain load current and overload current (working current), but cannot cut off short-circuit current (accident current). It must be used in series with a high-voltage fuse to cut off the short-circuit current. High voltage load break pole mounted switch are typically used to control power transformers.
The load break switch sf6 can turn on and off the circuit under load, and can quickly cut off the short-circuit current when the system has a short-circuit fault. That is to say, the circuit breaker can cut off the working current and the accident current, and it can also automatically cut off the short-circuit fault under the action of the protection device. Pole mounted recloser are mainly used in motors, large-capacity transformers and substations that frequently break loads.
(1) The circuit breaker can cut off the working current and the accident current, while the load circuit breaker can only cut off the working current but not the accident current. This is the main difference.
(2) To put it simply, circuit breakers are generally used in places that need to be disconnected frequently, and load-break switches are generally used in places where frequent disconnections are not required.
(3) Under certain conditions, the load break switch can replace the function of the circuit breaker, and the circuit breaker cannot replace the load break switch.
Zhuhai Gopower Smart Grid Co., LTD was established in 1998. It is one of the earliest high-tech companies engaged in the production of medium-voltage power transmission and distribution intelligent control equipment in China. It is one of the initiators and members of the Zhuhai Smart Grid Alliance. After 15 years of dedicated exploration and development, the company has grown into a leading enterprise in the field of intelligent power transmission and distribution in China. The company and Electric Gas have jointly participated in the construction of the world-renowned Olympic project in the transmission and distribution intelligent control project, mainly providing intelligent boundary load break switches and intelligent control systems to ensure stable power supply during the Olympics.