Determining the volume of gases in transformer cooling oil

Details Determining the volume of gases in transformer cooling oil Determining the volume of gases in transformer cooling oil

1992-04-17

1993-09-14

Williams, Hezron E.

Measuring and testing

Gas content of a liquid or a solid

By pressure of the gas

73 1911, 73 1912, G01N 700

Patent

active

052438481

ABSTRACT:
Apparatus for determining the volume of gas dissolved or entrapped in transformer cooling oil includes an oil receiver, a metering space and a piston pump arranged to apply a reduced pressure to oil in the receiver and to transfer the gas which is liberated from the oil into the metering space. The piston pump is connected to and controlled by a controller. The metering space comprises a cylinder which accommodates a piston which is connected to be moved by an actuator which is connected to and controlled by the controller. The pressure detector is provided which is responsive to the pressure in the metering space and is arranged to deliver a signal indicative of the magnitude of the pressure to the controller. A transducer is connected to the controller and is arranged to produce a signal, when the said pressure reaches a predetermined value, which is indicative of the volume of gas within the metering space.

REFERENCES:
patent: 3844160 (1974-10-01), Yamaoka
patent: 4236404 (1980-12-01), Ketchum et al.
patent: 4409814 (1983-10-01), Onuma et al.
patent: 4518328 (1985-05-01), Nemoto
patent: 4763514 (1988-08-01), Naito et al.
patent: 4764344 (1988-08-01), Knab
patent: 4972721 (1990-11-01), Conti

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