Entity

Time filter

Source Type


Singh R.,P.A. College | Singh A.,Gyan Ganga Institute of Technology and Sciences
2010 9th Conference on Environment and Electrical Engineering, EEEIC 2010 | Year: 2010

Distribution Transformer plays a crucial role in the power distribution network. Failure of distribution transformer results into interruption of power supply to consumers. This disruption affects the economy of nation in the form of loss of revenue, materials, repairing charges etc. Along with other causes, the main cause of failure of distribution transformers is prolonged overloading. In this paper three distribution transformers are analyzed and results are verified by dissolved gas analysis. Source


Singh R.,Jabalpur Engineering College | Singh A.,Gyan Ganga Institute of Technology and Sciences
ICHQP 2010 - 14th International Conference on Harmonics and Quality of Power | Year: 2010

Solid state electronics is used to increase the energy efficiency of electrical load devices. The harmonic distortion of current is increasing with the enhanced use of nonlinear loads i.e. solid state devices. Examples of nonlinear loads are personal computer, laptop, laser printer, fax machine, television set (TV), fluorescent tube with electronic ballast, compact fluorescent lamp, battery charger, adjustable speed drives, uninterrupted power supply (UPS) and any other equipment powered by switched-mode power supply (SMPS) unit. These nonlinear loads draw more current than the fundamental current and cause overloading of the components of the distribution system. Transformers are major components of the distribution system and are mainly affected by this overloading. This leads to higher losses, reduces the strength of insulation and consequently leads to reduction of useful life of the transformer. Aging of transformer increases due to overheating caused by overloading. This paper presents the results of a case study of aging of transformer caused by harmonics due to non linear loads. Here two transformers of 500 kVA and 100 kVA are considered which supply a technical institution and residential campus respectively. The harmonic currents produced by these loads are captured in the laboratory and their effect on transformers is studied. An attempt has been made to calculate the energy loss due to harmonic distortion caused by these nonlinear loads. The rise in operating temperature due to harmonic current and hence life expectancy of the transformers are calculated. ©2010 IEEE. Source


Krishan B.,Gyan Ganga Institute of Technology and Sciences | Zaafarany I.,University of Umm Al - Qura
Oriental Journal of Chemistry | Year: 2013

The present paper describes Synthesis and characterization, spectral, x-Ray and hypoglycemic activity studies of zinc complex with gliclazide, an oral antidiabetic drug. The conductometric titration using monovariation method indicate that complexes are non-ionic and L2M type. Analytical data agrees with the molecular formula (C15H20N 3O3S)2Zn. Structure of complex was assigned tetrahedral for zinc, supported by IR, X-Ray. Structure (I) is proposed for complex. Alloxan induced model was used to compare the hypoglycemic activity and found that zinc complex of gliclazide is more potent than parent drug. Source


Krishan B.,Gyan Ganga Institute of Technology and Sciences | El-Mossalamy E.H.,King Abdulaziz University
Oriental Journal of Chemistry | Year: 2013

Synthesis, characterization and spectral studies of gold complex with gliclazide, an oral antidiabetic drug have been studied. The conductometric titration using monovariation method indicate that complexes are non-ionic and L2M type. Analytical data agrees with the molecular formula(C15H 20N3O3S)2Au. Structure of complex was assigned tetrahedral, supported by IR, 1H-NMR. X-Ray and Mass studies. Structure (II) is proposed for complex. Source


Kumar P.,BRCM | Ranjan R.K.,Gyan Ganga Institute of Technology and Sciences | Kumar R.,Sudan University of Science and Technology
ARPN Journal of Engineering and Applied Sciences | Year: 2011

The paper reports on an investigation into the various aspects of open die forging of metal powder preforms, which have been compacted and sintered from atomized metal powder. An attempt has been made for the determination of the relative average die pressure developed for given geometries of the disc during the open die forging of sintered metal powder preform by using an upper bound and equilibrium method approach as different frictional stresses are assumed on top and bottom interfaces. The deformation characteristics of metal powder preform has been demonstrated by applying an appropriate interfacial friction law and yield criteria. The results so obtained are discussed critically to illustrate the interaction of various process parameters involved and are presented graphically. © 2006-2011 Asian Research Publishing Network (ARPN). Source

Discover hidden collaborations