Transformers and Tap Changers (OLTC’s)
Acoustic Emission Diagnostic and Monitoring of Power Transformers
Power transformers account for the largest portion of capital investment in transmission and distribution substations. Failure of a single power transformer carries a multimillion-dollar impact…
Autotransformer Core Degradation Case Study 5-01-2005
In 2003, a bank of three single-phase autotransformers,500/230/13.8 kV, OA/FA/ FA class, 146/194/243 MVA capacity, core type, was installed in a substation on the…
Bus Bar Fault Case Study 02-5-2002
Generator Step Up (GSU) Transformer, 25/500 kV, 784 MVA, FOA, Westinghouse, three phase, two pumps groups, shell form. This unit started gassing the last month…
Fault Detection On-Line Monitoring
Transformer On-line monitoring Case Study 206 2006 October 2006 – April 2007 3 phase, 300/336 MVA, 230/100/44 kV FOA Class This transformer exhibited periodic sudden…
Intranet/Internet Remote Monitoring Software & Systems
Acoustic emission has been proven to be a highly effective method for on-line plant asset management for critical status monitoring of materials, structures and processes. …
Online Monitoring of Power Transformers with AE SENSOR HIGHWAY II™
Introduction and Overview The Sensor Highway System™ is an Acoustic Emission (AE) Monitoring System with up to 16 high-speed monitoring channels and 4 parametric input…
PowerPAC™: Acoustic Emission Testing Technology Packages
PowerPAC™ is a Technology Package for detecting, locating and assessing not only partial discharge in power transformers but also thermal faults by utilizing Acoustic Emission technology….
Services & Products for Power Transformers
MISTRAS Group Inc., has been a leader in the evaluation of Power Transformers for over 20 years. Over the years, we have developed state of…