Remanufacturing has emerged as a way to solve production problems, raw material costs increase and environmental pollution caused by discarded equipment occurs. The process can extend product lifetime prevent waste of resources. In particular, it economical efficiency for large such GIS (Gas Insulated Switchgear). crucial points in remanufacturing are determining replaceable parts economic valu...

SF6, which is currently widely used in gas-insulated power transmission equipment, a greenhouse gas with very strong effect. Therefore, developing environmentally friendly insulation equipment to gradually reduce the use of SF6 has become hot research topic. As most potential alternative gas, C4F7N great significance study electrical characteristics medium-voltage switching field promote green ...

?‘lie paper presents an artificial neural network(ANN) approach using ARTS(Adaptive Resonance Theory 2) to a diagnostic system for a Gas Insulated Switchgear(G1S). To begin with, we will show the background of abnormality diagnosis of GISs from the view point of predictive maintenance of them. Then, we will discuss the necessity of ART-t,ype ANNs, as an unsupervised learning method, in which ne...

Anhydrous liquid ammonia has a boiling point of -33.35 C, which might suggest that it would be a difficult material to handle, particularly in light of the familiar noxious odor of the gas. However, owing to hydrogen bonding, liquid ammonia has a relatively high heat of vaporization (23.3 J/mol vs. 40.7 J/mol for H2O). Thus, if kept in an insulated vessel (e.g., a Dewar flask), its rate of vapo...

A four-stage parallel-plate gas insulated Blumlein pulser is under construction. This 90-ohm 16-ns (FWHM) pulser, targeted for operation a~ 400 kV, will be switched by an array of photoconductors triggered by a 15-J, Nd:glass laser for a 1-to-2-ns rise time. A smaller single-stage 100-kV 60-ohm 14-ns (FWHM) pulser, which has been used as a proof-of-principle testbed for the photoconductive swit...

The paper proposes the use of digital watermark based authentication for intrusion detection in IEC 61850automated substations. The watermark can be embedded into the Least Significant Bits of the measurements without visible deterioration in precision. When Intelligent Electronics Devices gets measurements, the watermark in the measurement can be retrieved to determine whether it has been atta...