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Librairie technique Megger

Librairie technique Megger

La librairie technique de Megger donne accès à une diversité de ressources telles que des guides techniques, des guides d'applications et bien d'autres. En créant un compte Megger, vous pouvez enregistrer vos produits, accéder à de nombreux documents et à des mises à niveau de logiciels pour vos produits.

 

Pour accéder à notre gamme de documents et de ressources techniques, cliquez sur les liens ci-dessous.

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    Affichage d'item(s) 1 - 10 de 27 au total
Augmenter la fiabilité des moteurs électriques en contrôlant leur système d’isolation
Le moteur électrique est un composant clef dans le monde de l’industrie et des transports. La défaillance d’un moteur électrique peut avoir un impact important sur les coûts de maintenance et les profits d’une entreprise. C’est la raison pour laquelle depuis déjà plusieurs années, de nombreux utilisateurs de moteurs électriques cherchent à augmenter la performance de leur système d’entraînement en adoptant une stratégie de maintenance orientée vers la prévision des défaillances.
Publié : 30 janvier 2020
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DFR: A New IEEE Guide for Field Test on Power and Distribution Transformers
Since the invention of the transformer, the design, quality and efficiency of this magnificent machine has been improved thanks to the development of electromagnetic materials, computer design algorithms, insulation materials, cooling systems, structural design, etc. Nowadays, a vast number of transformers operate worldwide aiming to provide reliable and safe operation under the most cumbersome environmental and operational conditions.
Publié : 15 avril 2019
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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.
Publié : 6 juin 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.
Publié : 6 juin 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.
Publié : 6 juin 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. 
Publié : 6 juin 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.
Publié : 6 juin 2018
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PowerOn TTSC June 2014
Improved transformer insulation assessment using dielectric response analysis.
Publié : 6 juin 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.
Publié : 6 juin 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. 
Publié : 6 juin 2018
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