2022-05-11

The gas pumped through the purification layer is pumped into the detector, and the detector produces corona continuous discharge effect under the action of pulse high pressure. When there is SF6 or halogen gas in the measured gas, the electronegativity of SF6 gas can inhibit the corona electric field in the detection. The stronger the electronegativity in the gas and the higher the substance concentration, the more the corona discharge effect is inhibited and the corona discharge current decreas

2022-04-25

A: Pressure gauges can measure pressure changes in electrical equipment. Density table is a pressure gauge with temperature compensation, its indicating value is the density or pressure of the measured gas, does not change with the change of ambient temperature, density table is divided into charged contact and no contact two, the general indicating unit is the pressure unit. The SF6 density relay is a pressure relay with temperature compensation, which is mainly used to send alarm signals and l

2022-04-25

A: The SF6 density relay monitors the SF6 gas density by means of the gas pressure indication, so it is a pressure indicator. According to the requirements of our country's national measurement inspection, the pressure gauge belongs to the strong inspection instrument. DL/T 596 "Preventive Experimental Procedures for Power Equipment" makes corresponding provisions for regular calibration of density table, SF6 gas density monitor (including setting value) inspection, once every 1-3 years, accordi

2022-04-25

A: At present, there are many methods of SF6 leak detection in the field, and various detection methods of SF6 leak detector mainly use SF6 as a electronegative gas, which has the characteristics of absorbing free electrons. The measurement principles of commonly used leak detectors include ultraviolet ionization detection, ion capture detection, vacuum high frequency ionization detection, negative corona discharge detection, laser imaging detection, infrared spectrum detection, etc.

2021-05-11

A: Electron Capture Device (ECD) uses the radioactive isotope Ni63 (nickel 63) as the ion reflector of the detector. When the carrier gas (usually argon or nitrogen) passes through the radioactive source, the high-energy electrons of the beta ray ionize the carrier gas to form positive ions and slow electrons, and migrate to the positive electrode to form a base flow. When the electronegative SF6 gas probe enters the detector, it traps the slow electrons in the detector to generate negative ions

2021-05-10

In the last hundred years, the earth's climate is undergoing a significant change with global warming as the main feature. This global warming is caused by both natural climate fluctuations and the greenhouse effect, which is enhanced by human activities. Reducing greenhouse gas emissions and mitigating climate change is the main goal of the United Nations Convention on Climate Change and the Kyoto Protocol, but China is facing more and more international pressure in reducing greenhouse gas emis