Transformer Monitoring Articles

  • Experiences with the OECD 308 transformation test: A human pharmaceutical perspective

    The OECD 308 water‐sediment transformation test has been routinely conducted in Phase II Tier A testing of the environmental risk assessment (ERA) for all human pharmaceutical marketing authorization applications in Europe since finalization of Environmental Medicines Agency (EMA) ERA guidance in June 2006. In addition to the ‘Ready Biodegradation’ test, it is the only transformation test for ...


    By John Wiley & Sons, Ltd.

  • Wavelet feature–based modular neural network for detection and classification of power quality disturbances

    Disturbances such as voltage sag, swell, interruption and harmonics are very typical in a power system. Power quality monitoring should be capable of identifying these disturbances to initiate mitigation action and protect sensitive loads. This paper presents wavelet–neural network–based detection and classification of power quality disturbances. Wavelet transform has the ability to analyse ...


    By Inderscience Publishers

  • Studies on three feature extraction methods for the location and classification of dynamic fault patterns during impulse testing of transformer winding

    Many computer aided classifiers have been employed for identification of impulse insulation failure parameters, viz. type, condition of insulation and location using significant features extracted from winding current. Classification accuracy of these classifiers is dependent on the ability of extracted features. In this present approach, an attempt has been made to identify suitable feature ...


    By Inderscience Publishers

  • Using UML(VR) for the support of the test data generation

    Software testing is the most common practice for assuring software quality. A method of supporting test data generation using information from different kinds of UML diagrams is presented in the paper. This method is based on the UML(VR) concept which is the extension of the standard UML by vertical relations which formally define relations between elements from different kinds of diagrams. Using ...


    By Inderscience Publishers

  • Classification of impulse fault response patterns in transformers using cascaded wavelet network

    Accurate identification of winding faults that may develop during impulse testing of transformer is of great importance for ensuring reliability and quality of power supply. In the present work a wavelet network based methodology has been proposed for feature extraction as well as classification of those features for impulse fault pattern identification. The classification involves two networks, ...


    By Inderscience Publishers

  • Redundant combustion plant for Novartis

    Type     HOFGAS®- IFM4c/2200/1500/60/180 Commissioning     2004 Site     Novartis (Basel, CH) Situation In order to prevent production failure due to missing redundancy in the flue gas clean up, Novartis required an additional system. During different production processes exhaust air load with organic components is formed. ...


    By Hofstetter BV

  • DAK Americas saves US$150,000 annually and transforms LDAR monitoring program into profit center

    Work smarter, not harder' has long been the goal at DAK Americas' polyethylene terephthalate resins (PET) ethylene glycol and monomers refining plant in Leland, North Carolina. Recently, the facility's environmental team applied that philosophy to the management of fugitive emissions information using FEMS Express™ software from ESS and achieved remarkable results. Like many chemical plants in ...


    By IHS Markit

  • Small firm transformation through IS

    Globally, Small and Medium-sized Enterprises (SMEs) are encouraged, particularly by governments, to embrace e-business. Fully adopting e-business involves substantial change in firms, both internally and externally. However, there is little understanding of the mechanisms by which such business transformation occurs. While there are no tested e-business transformation models, existing Information ...


    By Inderscience Publishers

  • Modelling oil degradation in electric transformer oil under typical loads

    In testing transformer oils for durability, it is desirable to use typical transformer operating conditions with appropriate allowances for factor of safety against temperature and voltage. The kinetics of degradation of used type II transformer oil with original flash point of 148?C, pour point of 51?C, and water content of 4 ppm was investigated. Assuming that the oil temperature in models Pr01 ...


    By Inderscience Publishers

  • Characterisation of power quality disturbances based on wavelet transforms

    This paper presents a new technique for detecting and characterising disturbances in power systems based on wavelet transforms. The voltage signal under investigation is often corrupted by noises, therefore the voltage signal is first denoised using wavelet thresholding and then wavelet transform is applied to the denoised signal. Using the first-level detail wavelet coefficients, the voltage ...


    By Inderscience Publishers

  • Smart products and service systems for e-business transformation

    Web-based intelligence is key to achieving global leadership in sixsigma product aftermarket service and manufacturing productivity for the 21st century. The need to improve the understanding of product performance for aftermarket service will lead to six sigma quality for product life cycle. With the proper integration of e-intelligence into products, manufacturing and service systems, ...


    By Inderscience Publishers

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you