Method and device for the monitoring of gases

Details Method and device for the monitoring of gases Method and device for the monitoring of gases

G - Physics

01

N

G01N 33/00 (2006.01) G01N 33/28 (2006.01)

Patent

CA 2408642

The invention relates to method for monitoring dissolved gases in liquid- filled high-voltage installations comprising a sealed separating vessel communicating with a liquid tank, wherein an equilibrium state of the liquid with the gas state prevails in the separating vessel during normal operation and liquid is pumped off from the separating vessel with a pump as to keep the liquid level at a predetermined height; including the following steps: Short-time interruption of the pumping action as to leave the equilibrium state and to increase the pressure in the separating vessel, and withdrawal of a gas sample from the gas phase above the liquid level in the separating vessel for the analysis thereof. The invention moreover relates to a method for monitoring dissolved and undissolved gases, wherein the method for monitoring dissolved gases is performed and undissolved gas is fed back into the separating vessel, and to a device for performing the methods according to the invention.

La présente invention concerne un procédé de contrôle de gaz dissous, dans des installations haute tension remplies de liquide, qui comprennent un récipient de séparation fermé, connecté à un réservoir de liquide. Dans un récipient de séparation en fonctionnement normal, il existe un équilibre entre l'état liquide et l'état gazeux. Selon cette invention, du liquide est pompé dudit récipient de séparation, au moyen d'une pompe, afin de maintenir le niveau de liquide à une certaine hauteur. Ledit procédé consiste à interrompre brièvement le processus de pompage, afin de perturber l'équilibre et d'augmenter la pression dans le récipient de séparation, puis à prélever un échantillon de gaz de l'espace gazeux, au-dessus du niveau de liquide dans l'espace de séparation, afin de l'analyser. La présente invention concerne également un procédé de contrôle de gaz dissous et non dissous, selon lequel ledit procédé de contrôle de gaz dissous est mis en oeuvre et le gaz non dissous est conduit dans le récipient de séparation, ainsi qu'un dispositif permettant de mettre en oeuvre le procédé selon cette invention.

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