Everyone should have heard of the high-voltage circuit breaker, and we also call it a high-voltage switch. Its function is generally to cut off the current in the high-voltage circuit, and it can also play the role of a protective device when the circuit fails.
Everyone should have heard of the high-voltage circuit breaker. We also call it a high-voltage switch. Its function is generally to cut off the current in the high-voltage circuit. When the circuit fails, it can also play the role of a protective device, which can cut off the overload current and some short-circuit currents. Haohua Dentsu Xiaobian has compiled some details of the high-voltage circuit breaker here. Let’s take a look at it together.
The main function of high-voltage circuit breaker in high-voltage current is control, and it is one of the indispensable components in high-voltage circuit. High-voltage circuit breakers are generally used in normal operation circuits, which can control the on and off of current. In the event of a fault, the circuit breaker will switch off the circuit from Haohua Electric, and of course, some special accidents will happen sometimes. If the circuit breaker automatically overlaps with the fault circuit, it may lead to short-circuit current.
High-voltage circuit breaker is a kind of special electrical appliance that breaks the circuit when a fault occurs. The opening or closing of the high-voltage circuit breaker mainly depends on its control mechanism. The products similar to the high-voltage circuit breaker include high-voltage load switch and high-voltage disconnector. Although there are some similarities among the three, there are also many differences. Let me introduce the differences between the three.
1. Under normal circumstances, although the high-voltage load switch can also break the current, its capacity is very small and its efficiency is far less than that of the high-voltage circuit breaker.
2. We know that both high-voltage disconnectors and high-voltage load switches can form disconnection points, but most high-voltage circuit breakers have no isolation function, and only a small number of circuit breakers have isolation function.
3. The disconnector has no load breaking function, because it has no arc cover in structure, but it has a high-voltage disconnector that can break the load, and its structure is different from the load switch, which is simpler.
4. In the process of making circuit breakers, the requirements for breaking capacity are very high. High-voltage circuit breakers rely on current transformers and secondary equipment to protect the current.
5. The disconnector does not have the function of current protection, but generally only has the functions of quick break and overcurrent. The high-voltage circuit breaker can control the ground current. It will be put into operation according to the needs of power system operation and some or all circuits. High-voltage circuit breakers can also play a protective role. When a part of Haohua Power System fails, it will cooperate with protective devices and automatic devices to cut off the failed part from the system to prevent the accident from expanding further.