Westinghouse Electric

About: Westinghouse Electric is a company organization based out in Cranberry Township, Pennsylvania, United States. It is known for research contribution in the topics: Brake & Circuit breaker. The organization has 27959 authors who have published 38036 publications receiving 523387 citations.

Color-Discrimination Index

Abstract: The area of the gamut, in a uniform chromaticity-scale diagram of the chromaticities of a standard array of object colors, is taken to be a measure of color-discrimination capability of an illuminant. The 1960 CIE u, v chromaticity diagram, and the eight test colors of the interim method for computing a color-rendering index, are used for demonstration. Correlation with long-standing subjective evaluations of color rendering of eight commercial lamps is shown. Artificial illuminants excel daylight and the equal-energy spectrum in the gamut of chromaticities of illuminated samples.

Harmonics-causes, effects, measurements and analysis-update

Abstract: Rectification generates harmonic voltages and currents that can cause problems, e.g. insulation failures due to overheating and overvoltages, malfunction of solid-state equipment, communication interference, etc. The common addition of power factor correction capacitors to such a system generally increases the likelihood of such problems occurring. Online data acquisition and analysis of the harmonic content of system voltages and currents may be necessary to identify the cause properly and recommend a solution. In response to these problems, a field-proven portable harmonic-measurement/analysis system is described, as well as the advantages and versatility inherent in its use. This portable, computer-based system provides on-site data collection, precise harmonic identification via a fast Fourier transform, data analysis, and report preparation via a custom spreadsheet. Specific examples involving the application of this measurement/analysis system in the cement, steel, and carbon industries are presented. >

Distribution network power line communication system

Abstract: A distribution network power line communication system which includes coupling means for applying a carrier current communication signal to the polyphase primary distribution conductors with a proportional relationship between the signal voltages applied to the various conductors selected to provide a predetermined propagation mode. Impedance elements are connected between the conductors at selected points remote from the coupling point, such as at the location of unbalanced loads, line taps, branches, capacitor banks, distribution transformers, and other line discontinuities which may cause mode conversion. The impedance elements are selected and connected to re-establish the predetermined propagation mode.

Introduction and effect of structural variations in inorganic polymers and glass networks

Abstract: Oxide glasses, being thermoplastic polymers, should be subject to considerable property variations as a result of differences in the network structure. Melting point, viscosity, and strength are among the properties that are closely related to network connectivity and distribution of the network bonds in the polymer. Glass formation by melting, however, does not allow a significant variation in network parameters, except by compositional changes. Chemical polymerization, on the other hand, permits the introduction of structural variations into the polymer network, and provides preparation of modified oxide glasses without compositional alterations. Silica network formation from silicon alkoxides is used as a model in driving relationships between physical and structural parameters, and supporting experimental evidence is presented. Some general effects of these parameters in several glass systems are included.

Conduction and polarization mechanisms and trends in dielectric

Abstract: This article discusses the theoretically deduced mechanisms for the magnitude and the trends of conduction and polarization in electrical insulation (dielectrics) with molecular and physical structure, frequency, and temperature. The discussion intends to explain the atomic, electronic, molecular, and ionic basis for these electrical properties, so that the reader can better understand why dielectrics behave the way they do. Application of these principles should also guide the reader to make estimates or rough predictions of conductivity and dielectric constant levels, and their variations, from an examination of the molecular/atomic composition of a material. Most of the discussion is more directly applicable to the condensed phases, solids and liquids. Gases, in principle, behave the same, but they have important differences because of their very much lower density and lack of restraint to molecular rotation and translation. An overriding factor in the magnitude of conduction and polarization is the number density of the participating species: electrons, ions, or dipolar molecules