Measuring and testing – Instrument mechanism or transmission – Rate of change
Patent
1998-02-24
2000-06-20
Noori, Max
Measuring and testing
Instrument mechanism or transmission
Rate of change
738658, G01N 3300
Patent
active
060764112
ABSTRACT:
A method of determining or assessing remaining life in insulation material includes using a computerized analytical model and supporting equipment to assess margin between an electrical insulation sample's given (i.e., known) void parameters (such as size and density) and void parameters corresponding to the threshold to integrity failure. The margin is then correlated to remaining life through use of known void growth rates, which are a function of temperature and other environmental service factors.
REFERENCES:
patent: 4197457 (1980-04-01), Cheo
patent: 4555799 (1985-11-01), Kodama et al.
patent: 4649621 (1987-03-01), Dusel et al.
patent: 4696191 (1987-09-01), Claytor et al.
patent: 4926452 (1990-05-01), Baker et al.
patent: 5031456 (1991-07-01), Askwith et al.
patent: 5241184 (1993-08-01), Menzel
patent: 5293220 (1994-03-01), Fukuda et al.
patent: 5594180 (1997-01-01), Carpenter et al.
patent: 5761335 (1998-06-01), Okamoto et al.
patent: 5844331 (1998-12-01), Kieser et al.
Suthar et al., "LSCM: A Nondestructive Diagnostic Tool for Examining the Microstructure . . . ", IEEE Electrical Insulation Magazine, vol. 8, No. 4, p. 20-24 (Jul./Aug. 1992).
Clough et al., "Accelerated-Aging Tests for Predicting Radiation Degradation . . . ", Nuclear Safety, vol. 25, No. 2, pp. 238-254 (Mar.-Apr. 1984).
Brunt, "Physics and Chemistry of Partial Discharge and Corona," IEEE Transactions on Dielectrics, vol. 1, No. 4, pp. 761-784 (Oct. 1994).
O'Dwyer, "Breakdown in Solid Dielectrics," IEEE Transactions, vol. EI-17, No. 6, pp. 484-487 (Dec. 1982).
Budenstein, "On the Mechanism of Dielectric Breakdown of Solids," IEEE Transactions, vol. EI-15, No. 3, pp. 225-240 (Jun. 1980).
Laurent et al., "Analysis of the Propagation of Electrical Treeing . . . ," IEEE Transactions, vol. EI-15, No. 1, pp. 33-42 (Feb. 1980).
Timpe et al., "Laboratory: Field Partial Discharge Studies by a Utility," IEEE Transactions, vol. EI-12, No. 2, pp. 159-164 (Apr. 1977).
Mayoux, "Corona Discharge and Ageing Process of an Insulation," IEEE Transactions, vol. EI-12, No. 2, pp. 153-158 (Apr. 1977).
Eichborn, "Treeing in Solid Extruded Electrical Insulation," IEEE Transactions, vol. EI-12, No. 1, pp. 2-18 (Feb. 1976).
Blodgett et al., "Insulations and Jackets for Control and Power Cables . . . ," IEEE Transactions, vol. PAS-88, No. 5, pp. 529-541 (May 1969).
David et al., "Influence of Internal Mechanical Stress and Strain on Electrical Performance of Polyethylene," IEEE Transactions, vol. 3, No. 2, pp. 248-257 (Apr. 1996).
Montanari et al., "Short-Term Thermal Endurance Characterization of Polymeric Cables . . . ," IEEE Transactions, vol. 3, No. 4, pp. 561-566 (Aug. 1996).
Brunig et al, "Absolute vs. Comparative End-of-Life Age," IEEE Transactions, vol. 3, No. 4., pp. 567-576 (Aug. 1996).
Gjaerde, "Multifactor Ageing Models--Origin and Similarities," IEEE Electrical Insulation Magazine, vol. 13, No. 1, pp. 6-13 (Jan./Feb. 1997).
Dang et al., "Electrical Aging of Extruded Dielectric Cables," IEEE Transactions, vol. 3, No. 2, pp. 237-247 (Apr. 1996).
"Nuclear Regulatory Commission Proposal No. SBIR-93-060", by David A. Horvath, Feb. 18, 1993, Ann Arbor, Michigan.
"Proposal To Research And Develop A Model For Predicting Electrical Insulation Life", by David A. Horvath, Apr. 14, 1995, Ann Arbor, Michigan.
"Partial Discharge--Part XI: Limitations To PD As A Diagnostic For Deterioration And Remaining Life", by C. Laurent and C. Mayoux, IEEE Electrical Insulation Magazine, Mar./Apr. 1992, vol. 8, No. 2.
"Partial Discharge XVII: The Early History Of Partial Discharge Research", by David A. Nattrass, IEEE Electrical Insulation Magazine, Jul./Aug. 1993, vol. 9, No. 4.
"Influence Of Space Charge Buildup On The Transition To Electrical Treeing In PE Under AC Voltage", by M. Mammeri, C. Laurent, J. Salon, IEEE Electrical Insulation Magazine, Feb. 1995, vol. 2, No. 1.
Advent Engineering Services, Inc.
Bradley Gregory L.
Noori Max
LandOfFree
Method and apparatus for determining remaining life of conductor 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 determining remaining life of conductor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for determining remaining life of conductor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1842201