GENERAL ARTICLES ABOUT OLTC TESTING – TAP CHANGER TESTING
Vibro-Acoustic Testing Applied on Tap Changers and Circuit Breakers (pdf)
Article describing a method to detect problems on high voltage circuit breakers and tap changers using vibro-acoustic analysis.
Condition Analysis and Assessment of On Load Tap Changer Acoustic Monitoring Principles and Techniques (pdf)
This paper presents an effective, easy to use and safe data acquisition collection process which can be applied to the 9 makes of in service OLTCs.
Application Note for vibration method applied on voltage regulator
Article for know what kind of voltage regulator signature we obtain and see if we can use the TAP-4 as a diagnostic instrument as it is commonly used for on load tap changers in transformers.
Expert Systems With Applications
An expert system for acoustic diagnosis of power circuit breakers and on-load tap changers.
The vibro-acoustic method as fast diagnostic tool onload tapchangersthrough the simultaneous analysis of vibration, dynamic resistance and high speed camera recordings.
Classic testing techniques give very little information on mechanical problems occurring inside an on load tap changer (OLTC) while in service. The vibro-acoustic method is based on the principle that all mechanical operations produce a vibro-acoustic pattern while operating. This pattern is recorded by an accelerometer and converted into a vibro-acoustic signature that is unique for each tap changer, and stable in time in the case of a healthy mechanism.