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WINS 2012 NDT Training Course Calendar: Contact us right away!
Level I/II MT/PT course in State College, PA December 12-15, 2011
Level I UT course completed in State College, PA December 5-9, 2011
Level III NDT Consultation Services for procedure development, personnel qualification, training etc. available
WINS expands fiberglass and steel tank inspection capability to include remote visual inspection.
WINS expands fiberglass and steel tank inspection capability to include remote visual inspection.
Level II UT course completed in State College, PA October 6-9, 2011
Level II AE course completed in State College, PA October 24-28, 2011
Level I MT/PT course completed in State College, PA October 10-11, 2011
Level I UT course completed in State College, PA September 26-30, 2011
Level I/II MT course completed in State College, PA September 22-23, 2011
Level I UT course completed in State College, PA September 6-9, 2011
Level I/II MT/PT course completed in State College, PA August 29-31, 2011
UT Weld Inspection course in Somers, CT August 23-25, 2011
Level II UT course completed in State College, PA August 15-19, 2011
Level I UT course completed in State College, PA August 12, 2011
Level II UT course completed in Toronto, OH, July 23, 2011
Level I UT course completed in State College, PA July 15, 2011
Level I/II MT/PT course completed in Mayfield, OH July 8, 2011
Level I/II MT course completed in Indiana, PA June 29, 2011
Level I UT course in State College, PA March 28-April 1, 2011
Level I AE course in State College, PA March 21-25, 2011
WINS President delivered a talk at the ASNT Pittsburgh Chapter on Acoustic Emission on March 17, 2011
View a presentation on the Principles and applications of long range ultrasound
WINS funded by Transportation Research Board to develop Bridge Cable Inspection Technology.
Watch video of Wireless Acoustic Emission Sensor Network for Bridge Structural Health Monitoring
Transformer Inspection using Acoustic Emission
Acoustic emission (AE) is a nondestructive testing technology that may be used to detect and locate partial discharges (PD) in oil-immersed power transformers and reactors. The technology may be applied to factory and field transformers. AE testing is commonly used after PD has been detected by another diagnostic procedure such as dissolved gas analysis or electrical measurement.
AE testing may be used to detect and locate PD from:
- The outside of the winding
- Between the core and the tank,
- Arcing/tracking of the oil surface
- Arcing/tracking of the bushing surface in the oil
- The de-energized tap changer
- The on-load tap changer.
PD detection from within the winding, and in between the winding and core, is difficult due to acoustic emission attenuation.
WINS uses the guidelines set forth in IEEE Standard C57.127-2007 "Guide for the Detection and Location of Acoustic Emissions from Partial Discharges in Oil-Immersed Power Transformers and Reactors for all inspections".
Partial discharges in oil-immersed transformers emit acoustic energy that may be detected using sensors mounted on the tanks outside wall. Acoustic emission from partial discharges are analyzed according to their intensity or amplitude, rise time and counts. Intense partial discharges from the outside of the winding, for instance, emit high amplitude PDs. PDs from within the winding are generally low amplitude and difficult to detect.
Other parameters including load current, pump current, temperature, and load tap changer motor current may be acquired and correlated with AE data to identify the operating conditions that cause PD.
Other parameters including load current, pump current, temperature, and load tap changer motor current may be acquired and correlated with AE data to identify the operating conditions that cause PD.