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Biblioteca Técnica

Biblioteca Técnica

La biblioteca técnica de Megger ofrece acceso a una amplia gama de contenidos y recursos, tales como guías técnicas, notas aplicativas y mucho más. Cuando usted se registra y crea una cuenta Megger, usted podrá entre otras cosas, registrar su producto y tener acceso a una amplia gama de actualizaciones de software y descarga para su productos.

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    Mostrando artículo/s 1 - 10 de 25 en total
Transformer testing techniques and standard development
Review of IEEE, CIGRE and IEC standards for power transformer testing including overview of various frequency response analysis (FRA) techniques.
Publicado: 14 noviembre 2018
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UHF PD-Diagnosis at high voltage cable terminations – International case studies
Different partial discharge defects show a different distribution in the frequency spectrum. These typical characteristics could be used in combination with the appropriate phase resolved partial discharge pattern for the analysis of partial discharge defects. The classification of the partial discharges allows an assessment of the defects in terms of its criticality.
Publicado: 14 noviembre 2018
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Pre-locating faults with alternative method to arc reflection
While the share of installed cables without a jacket generally continues to decrease, the unjacketed cables that remain continue to age. As they do so, it is increasingly likely that a fault will develop on these cables. It can be particularly troublesome to locate faults on unjacketed cables as normal Time Domain Reflectometry, or radar, based fault location techniques often do not work, due to the corrosion of the neutral wires. While there is no guaranteed action that would result in locating the fault, this paper will outline some advanced methods, based on field experience, that can help when locating these types of faults. This paper was an article presented at NETA in 2017 and will discuss the Impulse Current method, which does not rely on the neutral wires being intact, in both a theoretical and practical light. 
Publicado: 14 noviembre 2018
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The characteristics of insulation resistance
During recent years a great deal of valuable research work has been done to increase our knowledge of the properties of insulating materials, yet notwithstanding the progress so made the natural laws governing insulation resistance are but little understood.
Publicado: 14 noviembre 2018
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The Importance and Benefits of Portable Testing
A Portable Appliance Tester (PAT) is an instrument that is dedicated solely to the safety testing of portable electrical equipment in accordance with recognized national and local standards. Depending on locale, these standards may have been enacted into law. They may be requirements of specific industries or trade organizations, or just a good idea. In many cases, manufacturers of electrical consumer products who wish to export to foreign markets will be required, sometimes by national law, to assure the products have been safety tested. If testing is performed at time of manufacture, it will save money, aggravation and ill will that could result from having the products fail in the destination country. 
Publicado: 14 noviembre 2018
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On-site testing of special transformers
The increased usage of the phase shifting transformers in various fields within power systems has introduced new challenges in performing on-site maintenance testing.
Publicado: 14 noviembre 2018
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PowerOn TTSC June 2014
Improved transformer insulation assessment using dielectric response analysis.
Publicado: 14 noviembre 2018
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Power transformer demagnetisation
Abstract-Switching operations and direct current applied during routine testing procedures of static winding resistance measurement leave residual magnetization in the core and/or fully saturate the core of the transformer.
Publicado: 14 noviembre 2018
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Investigations on a combined resonance/VLF HV test system – partial discharge (PD) characteristics at VLF and DAC voltages
The necessity of HV cable testing is a given fact. So far, two testing methods, 24 hour soak or resonance testing are commonly used. This paper describes a comparison of test power demand dependent from voltage shape and test capacitance as well as the power consumption of test systems for different test techniques.
Publicado: 14 noviembre 2018
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Lessons learned from a 400 kV busbar misoperation utilizing the IEC 61850 standard
This paper discusses the investigation of the tripping of a 400 kV substation due to improper operation of a bus-bar protection scheme.
Publicado: 14 noviembre 2018
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