What Is an Earth Leakage Circuit Breaker?
Residual Current Circuit Breaker: A switch that can automatically operate when the leakage current in the circuit exceeds a predetermined value. Commonly used earth leakage circuit breakers are divided into voltage type and current type, and current type is divided into electromagnetic type and electronic type.
- Voltage-type earth leakage circuit breakers are used in low-voltage networks where the neutral point of the transformer is not grounded. Its characteristic is that when a person is electrocuted, a relatively high voltage appears on the neutral line, which causes
- Choose according to the purpose of use and the place where the electrical equipment is located
- 1) Protection against direct contact with electric shock
- The direct contact with electric shock is more serious and the consequences are serious. Therefore, a more sensitive leakage circuit breaker should be selected. Power tools, mobile electrical equipment and temporary lines should be installed in the circuit.
- installation
- 1. Before installation, check whether the data on the leakage circuit breaker nameplate is consistent with the requirements for use.
- 2. Do not place too close to the high current bus and
- GB 10963-1989 | Household and similar place circuit breakers
- GB 14048.2-1994 | Low-voltage switchgear and control equipment
- GB 16916.1-2003 | Without household and similar uses
- Statistics show that the market size of China's low-voltage circuit breaker industry in 2011 was 40 billion yuan. In the next few years, with the continuous increase of new power generation in China and the rapid development of other downstream industries, the domestic market demand for low-voltage circuit breaker products will continue to grow. Therefore, the market size of China's low-voltage circuit breaker industry will also grow rapidly. It is expected that By 2016, the market size of China's low-voltage circuit breaker industry will be close to 80 billion yuan.
From the end of the 20th century to the beginning of the 21st century, major foreign well-known companies successively introduced new ACBs and MCCBs, and continuously improved and expanded them. There have been major breakthroughs and innovations in terms of main technical performance, product structure, and new technology applications. Among them, Germany's Siemens is the most prominent. Its communicable low-voltage electrical appliances can already form very large industrial systems, power distribution monitoring systems and building automation systems; MDU series circuit breakers developed by Mitsubishi Corporation can directly implement power energy monitoring networks. System, equipment monitoring network system, etc.
Low-voltage electrical appliances are widely used in various industries of the national economy and are closely related to the situation of fixed investment in the whole society. The beginning of the 21st century is a period of rapid development of China's low-voltage electrical appliance industry. The growth rate of China's low-voltage electrical appliance industry has remained at 10% -15% in recent years. The market capacity of the low-voltage electrical appliance industry is closely linked to the development of the power, industry, real estate, and telecommunications industries, coupled with the structural adjustment of the demand for low-voltage electrical appliances and the potential demand of the international market, providing a broad space for the future development of the low-voltage electrical appliance industry.
- During the "Twelfth Five-Year Plan" period, with the advancement of smart grid construction and the continuous development of low-voltage electrical appliance production technology, a new generation of low-voltage electrical appliances featuring intelligent, modular, and communicable features will become mainstream products in the market. The first generation products will exit the market in 2010, the second generation products will become low-end products, and the third generation products and some second-generation products will become mid-end products. From 2011 to 2015, the smart grid will enter a comprehensive construction phase in seven major aspects, including power transmission, transformation, distribution, and communication. The total investment in smart grid construction will be close to 2 trillion yuan. In early 2011, the State Council decided to implement a new round of rural power grid transformation and upgrading projects. The new round of rural grid transformation project will bring important development opportunities to the low-voltage electrical industry.