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Effect of contact pressure of vacuum circuit breaker

The contact can be buffered during the collision, the kinetic energy of the collision is converted into the potential energy of the bounce, and the bounce of the contact is suppressed. (4) Provide an acceleration force for the opening. When the contact pressure is large, the moving contact gets a large opening force, which is easy to break and will cause welding points, improve the initial acceleration of the opening, reduce the arc time and improve the breaking capacity. Contact pressure is a very important parameter, in the initial design of the product to go through many times of verification, testing before the selection is more appropriate. If the contact pressure is selected too small, it cannot meet the requirements of the above aspects. However, if the contact pressure is too large, on the one hand, the closing operation work needs to be increased, and the mechanical strength requirements of the arc extinguishing chamber and the whole machine also need to be improved, which is technically uneconomical.

Discussion on the Habitual Violation of Information Security in County-level Power Supply Enterprises

Abstract: With the continuous development of information construction of county-level power supply enterprises, information security issues are becoming more and more important, and as equipment, network users, some of their own bad habits will unknowingly bring hidden dangers to the entire information network and even accidents. This paper analyzes and expounds the characteristics, performance, causes and preventive measures of habitual violations, and reminds enterprises and individuals to put an end to violations and ensure safety.

What are the benefits of installing rooftop photovoltaic power stations in industrial and commercial plants?

In recent decades, with the continuous development of the domestic economy, energy shortages and environmental pollution have become two major problems that slow down the long-term economic development. The installation of photovoltaic solar energy is an effective way to solve these two problems from the perspective of environmental protection and energy. For enterprises, not only can reduce the energy consumption of enterprises, some areas have stipulated energy saving and emission reduction indicators, and the installation of photovoltaic power stations is also a good way.

Application of Input Switching Value in Accident Treatment of Microcomputer Protection Device

The outstanding advantages of automatic detection microcomputer protection device. It has a lot of self-test items, the self-test of the input switch is one of them. When the protection device detects the change of some input switching value, it will lock some functions of the microcomputer protection device and print them out through the printer. At the same time, the self-test of the input switch also provides us with great help in dealing with the accident of the microcomputer protection device.

State Grid: Accelerate the construction of "three types and two networks" world-class energy Internet enterprises

State Grid Co., Ltd. carried out the second batch of "Do not forget your initiative mind, Keeping in mind the mission" theme education and publicity with high quality, promoted the study and implementation of Xi Jinping's new era of socialism with Chinese characteristics to go deep, heart and reality, strengthen positive guidance, strengthen public opinion supervision, carry forward the main theme, gather positive energy, highlight learning while reforming, and combine measures to serve the people and do business. Show a good image of the company's reform and development to serve the people. Read the author gave birth to a lot of emotion.

Institutional research enthusiasm is not reduced photovoltaic and 5G industry chain is the most popular

The Mid-Autumn Festival holiday does not change the enthusiasm of A- share institutions for research. Last week (September 9 to September 12), the number of institutional research continued to rise, the topics of institutional research gradually dispersed, and the situation of corporate orders became the focus of institutional attention. During the period, many companies revealed that the company's orders were full.

Economic and environmental benefits of non-ferrous plume formation and treatment technology in ultra-low emission coal-fired power plants

In 2016, Shanghai issued the "Air Pollutant Emission Standard for Coal-fired Power Plants", requiring coal-fired power generation boilers to take smoke temperature control and other effective measures to eliminate the phenomena of "gypsum rain" and "colored plume". The governance of "colored plume" began to be highly concerned by local governments. By the end of 2018, Tianjin, Zhejiang, Hebei and other provincial and municipal governments or relevant departments have required comprehensive treatment of the "non-ferrous plume" of ultra-low emission coal-fired power plants. However, at present, "gypsum rain", "chimney rain", "white smoke", "colored plume", "wet plume", "blue smoke", "black smoke", "yellow smoke" and other words are found in government documents, academic papers and media, making the government and enterprises at a loss. Therefore, this paper makes a comprehensive system definition study on the non-ferrous smoke plume, which provides a decision-making basis for the objective analysis of the plume management of coal-fired power plants to meet the ultra-low emission requirements.

80% of new energy used cars have a service life of less than two years.

It was learned at the China New Energy Used Car Development Forum recently held in Guiyang that China's new energy used cars increased by 25% year-on-year in May, mainly concentrated in Class A and below models, and 80% of new energy used cars have a service life of less than two years. The price range is below 50000 yuan.

The whole country will carry out the reform of fire administrative examination and approval of construction projects.

On July 16, the national construction project fire protection administrative examination and approval reform work meeting held in Dongguan, Guangdong Province made a decision. It will learn from the reform pilot experience of Guangdong, Shanghai and other places, and implement the construction project fire protection design review, fire protection acceptance technical review and inspection throughout the country. Separation system from administrative approval.