Electricity: measuring and testing – A material property using electrostatic phenomenon – In a liquid
Patent
1988-03-02
1989-10-10
Eisenzopf, Reinhard J.
Electricity: measuring and testing
A material property using electrostatic phenomenon
In a liquid
324547, 324553, G01R 3112
Patent
active
048734896
ABSTRACT:
The density of charge entrained in fluids such as oils in transformer systems, capacitors, cables, pumps and fuel transfer systems is measured by introducing the oil into a conductive container which expands in volume to receive the fluid without expelling any fluid. The container is shielded by a grounded conductor which prevents inducement of charge on the container by external sources. By measuring the current between the conducting expandable container and the surrounding shield and accounting for the effects of the charge induced on the outer wall of the container by its own induced voltage, the net charge entrained in the fluid as it is brought into the container is deduced. Extraneous effects of conduction and electrokinetic currents are automatically excluded from the measurement. The oil is then automatically returned to the transformer system by the contraction of the conductive container so that the measurement can be repeated without accumulating an inventory of fluid.
REFERENCES:
patent: 2756388 (1956-07-01), McLean
patent: 3040250 (1962-06-01), Fuchs
patent: 3368144 (1968-02-01), Gerdes
patent: 3405722 (1968-10-01), Carruthers et al.
patent: 3453538 (1969-07-01), Wright et al.
patent: 3585861 (1971-06-01), Keng
patent: 4194148 (1980-03-01), Ohkubo
patent: 4249131 (1981-02-01), Owen
patent: 4309661 (1982-01-01), Kamoto
patent: 4449101 (1984-05-01), Canzoneri
patent: 4463316 (1984-07-01), Messens et al.
Markus Zahn, Electromagnetic Field Theory: a Problem Solving Approach, (N.Y.: John Wiley & Sons, 1979), pp. 53-54.
Electrostatics in the Petroleum Industry, A Royal Dutch/Shell and Development Report, Eds. A. Klinkenberg and L. J. van der Minne (Amsterdam: Elsevier Publishing Company, 1958), pp. 49-51, 119-123, 132, 166-168.
T. V. Oommen et al., "Electrostatic Charging Tendency of Transformer Oils," IEEE, 1984, pp. 1-9.
T. Tanaka et al., "Model Approach to the Static Electrification Phenomena Induced by the Flow of Oil in Large Power Transformers," IEEE, 1980, pp. 1097-1106.
H. Okubo et al., "Charging Tendency Measurement of Transformer Oil," IEEE, 1979, pp. 1-8.
Melcher James R.
Morin, II Alfred J.
Zahn Markus
Eisenzopf Reinhard J.
Massachusetts Institute of Technology
Regan Maura K.
LandOfFree
Method and apparatus for measurement of charge entrained in flui does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for measurement of charge entrained in flui, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measurement of charge entrained in flui will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1959619