Lead: High-voltage circuit breakers should have been heard by everyone. We also call it a high-voltage switch. Its function is generally used to cut off the current in the high-voltage circuit. When the circuit fails, it can also play the role of a protection device. It is possible to cut off the current exceeding the load and some short-circuit current. Xiaobian has compiled some details of the high-voltage circuit breaker here. Let's take a look at it.
The main function of the high-voltage circuit breaker in the high-voltage current is the control function, which is one of the indispensable components in the high-voltage circuit. The high-voltage circuit breaker is generally used in the circuit for normal operation, and can control the current to be turned on and off. In the event of a fault, the circuit breaker automatically disconnects the circuit, and of course, some special accidents sometimes occur. If the circuit breaker automatically recloses to the faulty circuit, it is possible to pass the short-circuit current.
A high voltage circuit breaker is a special type of electrical device that opens a circuit in the event of a fault. The disconnection or closing of the high-voltage circuit breaker depends mainly on its control mechanism. Products similar to the high-voltage circuit breaker have high-voltage load switches and high-voltage isolating switches. Although these three have some similarities, there are also many The difference, here I want to tell you about the differences between the three.
1. Under normal circumstances, the high-voltage load switch can also break the current, but its capacity is very small, and the efficiency is far less than that of the high-voltage circuit breaker.
2. We know that both the high-voltage isolating switch and the high-voltage load switch can form a breaking point, but most of the high-voltage circuit breakers have no isolation function, and only a very small part of the circuit breaker has an isolation function.
3. The isolating switch has no load breaking function, because its structure does not have an arc cover, but it has a high-voltage isolating switch that can break the load, and its structure is different from the load switch, which is simpler.
4. The requirements for the breaking capacity of the circuit breaker during the production process are very high. The high-voltage circuit breaker relies on the current transformer and the secondary device to protect the current.
5, the isolation switch does not have current protection function, it generally only has the function of quick-break and over-current. The high voltage circuit breaker can control the current. It will be based on the needs of the power system operation, as well as part of the circuit or all line inputs. The high voltage circuit breaker also serves as a protection. When a certain part of the power system fails, it cooperates with the protection device, the automatic device, etc., and removes the faulty part from the system to prevent the accident from further expanding.
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