2019-06-29

Pure SF6 gas is colorless, tasteless, non-toxic, non-flammable inert gas, its own decomposition temperature is greater than 500 ° C, in the normal operation of the decomposition products are very few, but when co-existing with metal materials, at 200 ° C it is possible to occur trace decomposition. As the insulating medium of gas-insulated combined electrical apparatus (GIS), sulfur hexafluoride (SF6) gas has excellent insulation and arc extinguishing performance, and can greatly reduce the size

2019-06-24

In case of an emergency, such as a large leakage of the SF6 distribution GIS device, evacuate the site immediately and start all exhaust fans to exhaust air. Only after sufficient natural exhaust or forced exhaust, with a leak detector to measure the SF6 gas qualified, with the instrument to detect the oxygen content (not less than 18%) qualified, personnel are allowed to enter. When the explosion-proof film of the equipment breaks, it should be treated with power failure and wiped clean with ga

2019-06-20

(1) SF6 gas has been widely used in the power industry because of its excellent insulation properties and arc extinguishing performance. The application of SF6 gas can not only improve the safety and reliability of power station operation, but also reduce the volume of electrical equipment, reduce the weight, reduce the cost, extend the life and maintenance cycle. However, SF6 gas will generate toxic and harmful substances under certain conditions, threatening the safety of personnel and equipme

2019-06-02

SF6 molecule has strong electronegativity, which makes SF6 have strong arc extinguishing ability. Because SF6 molecules become negative ions after adsorption of free electrons, negative ions are easy to combine with positive ions to form neutral molecules, so that the electrical conductivity of the arc space quickly disappears. Especially when the arc current is close to zero, this effect is more significant, and SF6 gas blows the arc, making a large number of fresh SF6 molecules constantly in c

2019-05-18

The DL/T596-1996 "Preventive Test Procedures for Power Equipment" implemented by the Power Department on January 1, 1997 clearly stipulates that SF6 density relays should be regularly checked with a maximum of 2 years as a cycle; It is recommended to perform a verification test once a year.

2019-05-14

SF6 switch is a high voltage appliance widely used in power system. The reliable operation of SF6 switch has become one of the concerns of the power supply department. SF6 gas density relay is an important component used to monitor SF6 gas density change in SF6 switch body. Its performance directly affects the safety of SF6 switch operation. SF6 gas density relays running in the field often have inflexivity and poor contact after a period of time due to infrequent action, and some also have poor