Research on Calibration Technology of SF6 Gas Density Relay at Low Temperature

The study of the low temperature through using the temperature compensation and the actual software SF6 gas temperature compensation technology, realizing that sulfur hexafluoride is density relay check under the low temperature. By improving the pure SF6 gas pressure by experimental data and mathematical model of the relationship between temperature and draw the curve of the sulfur hexafluoride gas pressure and temperature, then determine the compensation mode. Theoretical analysis to improve the performance of the ways of testing, perfect craft application conditions, fill the blank of the low temperature calibration technology.