Case studies are an important part of testing and investigating issues pertaining to transformer health and failure. The following case studies are applied to the LEDT model and other generally accepted methods. The purpose of these case studies is to assess the LEDT model. Click on the links below to go to the specific case studies.
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The correct design and operation of the cooling system of a power transformer is very important to maintain the health of the transformer. ... -
Background [2] On the 15 May 2005 this 390 MVA GSU transformer failed. During the previous unit outage the transformer oil was purif... -
The Rogers Ratio method is another ratio method very similar to the Dornenburg method however only having the three ratios R1 :CH 4 /H 2 ... -
Power transformers are generally designed for an operating life of 30 to 35 years. However, depending on how the transformer is operated,... -
INTRODUCTION A major challenge to transformer engineers of power utilities and major industries is the management of an ageing transform... -
Different gases/parameters have different solubility levels in mineral oil [DiGiorgio1]. It is important to correctly identify the level... -
The Dornenburg ratio method makes use of the ratios of the concentration of the key gases hydrogen, methane, ethane, ethylene and acetyle... -
The Duval Triangle Method makes use of the three combustible gases CH 4 , C 2 H 4 and C 2 H 2 that are transformed for representation i... -
The following report highlights the problem of the production of combustible gases in the selector of the tap changer of gen/motor transfo... -
Power transformers play a key role in any power network and must be maintained and effectively monitored with continuous condition assess...
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