LU Zi-qiang1, HU Hai-jian2. High Elevation Influence on SF6 Gas Density Relay and SF6 Gas Charging Pressure of Electrical Equipment[J]. High voltageapparatus, 2009, 45(4): 37-40+46.
LU Zi-qiang1, HU Hai-jian2. High Elevation Influence on SF6 Gas Density Relay and SF6 Gas Charging Pressure of Electrical Equipment[J]. High voltageapparatus, 2009, 45(4): 37-40+46.DOI:
This paper analyzes the cause of elevation influence on SF6 gas density relay through choosing three different brands that are commonly used in Qinghai electric power system
and conducts a test at different elevations.It is found that the elevation influence is actually the influence of air pressure.A solution to the elevation influence problem is proposed
which includes unbolting the oil charging screw of SF6 gas density relay in field
and retightening it as the gas pressure inside the shield equals to atmospheric pressure
then conducting test and putting the delays into operation.