DEVICE FOR MEASURING THE CONCENTRATION OF A GAS DISSOLVED IN AN ELECTRICAL INSULATION OIL

摘要

A device for measuring the concentration of a gas dissolved in an electrical insulation oil comprises a measuring member (2), internally defining a measuring chamber (3) and a conduit (4) to access the measuring chamber (3), a membrane (6) permeable to gases, inserted inside the conduit (4) for insulating the measuring chamber (3) against the oil and allowing gas to pass from the oil to the measuring chamber (3), a sensor (20) located in the measuring chamber (3) for measuring the concentration of gas in the measuring chamber (3), and a reinforcing grid (8) positioned in the conduit (4) for preventing deformation of the membrane (6), where the grid (8) is located at a position adjacent to the membrane (6) on the side opposite to the measuring chamber (3), and has at least one through section (9,10) for allowing the oil to exert pressure directly on the membrane (6).

主权项

1. A device for measuring the concentration of a gas dissolved in an electrical insulation oil, comprising:
a measuring member (2), with a measuring chamber (3) and a conduit (4) communicating with said measuring chamber (3), said conduit (4) defining a termination (4a) which is connectable to a container for the electrical insulation oil of said equipment; a membrane (6) permeable to gases, inserted inside the conduit (4), for separating the measuring chamber (3) from the oil in said container and for allowing gas to pass from the oil towards the measuring chamber (3); a sensor (20) located in the measuring chamber (3) to measure a value of the gas concentration in the measuring chamber (3),wherein said measuring member (2) comprises a reinforcing element (8), located in the conduit (4) at a position adjacent to a surface of the membrane (6) facing the side opposite to the measuring chamber (3), and having a plurality of resistant portions (11) defining between them through apertures (9), which form a section (9, 10) through which the oil passes and comes operatively in contact with said surface of the membrane (6).