The application of solid ring main unit circuit breakers is now widely used in various fields. With the continuous expansion of the power market and the popularization of new power equipment, the advantages of solid ring main unit circuit breakers are becoming more and more obvious.
Development History of Solid Ring Main Unit Circuit Breakers
1.Development history of circuit breakers in ring main units
With the continuous development of the power industry, the solid ring main unit circuit breaker, as one of the important circuit breaking devices in the power industry, is increasingly used in the power industry. This chapter will introduce the development history of solid ring main unit circuit breakers.
2.The invention and establishment of the circuit breaker of the solid ring main unit
The solid ring main unit circuit breaker was born in 1888 and was invented by the German Ernst Werner von Siemens, at the time of the industrial revolution, and the electrification revolution was sweeping the world. At this stage, with the substantial increase in industrial productivity brought about by the electrification revolution, governments have invested heavily in energy supply, and the power industry is the most important part of it. Shortly thereafter, the German Karl Wilhelm Siemens created an electric switch on the basis of his brother Ernst Werner von Siemens. These are all important inventions during the Industrial Revolution.
3.The use of circuit breakers in solid ring network cabinets
Solid RMU circuit breakers became widely used in the 1930s. At that time, as industrial productivity increased dramatically, electricity demand also grew rapidly. Then came the problem of insufficient power supply. Therefore, various countries have begun to use solid ring main unit circuit breakers in large quantities to ensure supply capacity. In addition, solid ring main unit circuit breakers are also often used as “spare parts” in power installations in case of emergency.
Working principle of solid ring main unit circuit breaker
The working principle of the solid ring main unit circuit breaker is that when the current is too large, the circuit breaker will automatically open to prevent the harm caused by the excessive current. The solid ring main unit circuit breaker uses the attractive force of the magnet to disconnect the circuit. When the magnet inside the circuit breaker is subjected to the action of the current, a magnetic field will be generated. This magnetic field will attract the external magnets, so that the external magnets will enter the circuit breaker and break the circuit. Because the magnetic field of the solid ring main unit circuit breaker can effectively prevent the interference signals from the external environment from entering the interior, it can shield electromagnetic radiation and avoid electromagnetic interference to a certain extent.
Application fields of solid ring main unit circuit breakers
There are three main application fields of solid ring main unit circuit breakers:
The first is the protection of the power system; the second is power load sharing; the third is to prevent the power system from overloading.
In terms of the protection of the power system, the circuit breaker of the solid ring main unit can effectively ensure the safe operation of the power system. In large power plants, power stations, important industrial enterprises, departmental agencies and other special places, solid ring main unit circuit breakers should be installed.
In terms of power load sharing, when multiple circuit breakers are disconnected at the same time in the power supply circuit, the current distribution in the power supply circuit will be uneven. balance.
In terms of preventing power system overload, when an excessive short-circuit current occurs in the power supply circuit, it may cause the overcurrent protector or rectifier in the power supply circuit to fail. The solid ring main unit circuit breaker is stacked in the power supply distribution, and it will be stacked for a long time without inhalation failure.
Characteristics of solid ring main unit circuit breakers
1.Characteristics of solid ring main unit circuit breakers
A solid ring main unit circuit breaker is composed of one or more circuit breaker elements, whose function is to cut off or reconnect the current on the power line. Solid ring main unit circuit breakers have many advantages, such as high reliability, long life, easy to use and so on.
2.Classification of solid ring main unit circuit breakers
Solid ring main unit circuit breakers can be divided into single-phase and three-phase. Single-phase solid ring main unit circuit breakers are generally used to cut off single-phase power, and three-phase solid ring main unit circuit breakers are generally used to cut off three-phase power.
Advantages of solid ring main unit circuit breakers
- The solid ring main unit circuit breaker has high selectivity and sensitivity, and can effectively filter out interference signals.
- The solid ring main unit circuit breaker has a strong overcurrent protection function, which can effectively avoid damage caused by overcurrent.
- The circuit breaker of the solid ring main unit has lower requirements on the switching times under high current, which can reduce the life problem caused by the switching times.
- When the circuit breaker of the solid ring main unit works, it only produces weak noise and will not affect the working environment.
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