2020-03-18

Jiangxi Power Grid Company Wenshan station is located in Ji 'an, belongs to the ultra high voltage power grid of Jiangxi Province, that is, 500 kV power transmission and transformation project scale, from the last place in the Central China power grid in the past few years to the front of the central China power grid and the central power grid, the power transformation capacity of 4.5 million kVA, 500 kV lines up to 16, the total length of more than 1320 kilometers.

2020-02-06

Sulfur hexafluoride was a colorless, odorless, non-toxic, and non-flammable stable gas. Its molecular weight was 146.07. Its density was 6.1kg/m3 at 20℃ and 0.1 MPa, which was about 5 times the density of air. Sulfur hexafluoride is a gas at normal temperature and pressure, and its critical temperature is 45.6℃, the triple point temperature is -50.8℃, and the sublimation point temperature is -63.8℃ under normal pressure. Sulfur hexafluoride has octahedral configuration, small bonding distance an

2020-01-13

From the basic physical characteristics of SF6 gas, it can be seen that it is relatively easy to liquefy gas compared with air. The state of SF6 gas depends on parameters such as its pressure and temperature. The critical temperature is the highest temperature at which a gas can be liquefied. The lower the critical temperature, the less likely the gas is to be liquefied. The critical temperature of SF6 gas is 45.6 ° C, indicating that the temperature is higher than 45.6 ° C in order to mainta

2019-12-19

According to the ideal gas,equation of state pv=nRT It can be seen that the pressure p is a linear relationship of temperature. As shown in the figure below, when the gas temperature in the sulfur hexafluoride equipment changes, the value of the pressure gauge changes with it, and it is not ready to show the state of the equipment.

2019-12-16

At present, high voltage switchgear generally uses SF6 gas with excellent arc extinguishing performance and high insulation strength as the arc extinguishing and insulating medium, but from the running situation, SF6 gas leakage is still one of the main defects of such equipment.

2019-12-11

With the rapid development of China's power industry, SF6 technology has been applied more and more widely. SF6 gas is an ideal insulating and arc extinguishing medium because of its inherent characteristics. However, its micro-water content will have a direct impact on the operation of equipment, the safety of personnel and the reliability of the power grid. Therefore, the micro-water content monitoring of SF6 electrical equipment has always been an important part of equipment monitoring in rel