Title :
On-load tap changer diagnosis-an off-line method for detecting degradation and defects: part 2
Author :
Erbrink, Jur J. ; Gulski, Edward ; Smit, Johan J. ; Leich, Rory ; Quak, B. ; Malewski, Ryszard A.
Author_Institution :
Delft Univ. of Technol., Delft, Netherlands
Abstract :
The following conclusions may be drawn from the material presented above: 1. Dynamic resistance measurements on OLTCs provide early warning of developing faults. They may be used to assign condition indices based on dynamic resistance boundary values. 2. The boundary values can be derived from field measurements, laboratory experiments, and failure investigations. 3. Using a flowchart in conjunction with the dynamic resistance data greatly simplifies the condition index assignment.
Keywords :
failure analysis; on load tap changers; OLTC; condition index assignment; defect detection; degradation detection; dynamic resistance boundary values; dynamic resistance data; dynamic resistance measurements; field measurements; off-line method; on-load tap changer diagnosis; Aging; Contact resistance; Current measurement; Degradation; Electrical resistance measurement; Power transformers; Transformers; contact; contact resistance; dynamic response; power transformer; resistancemeasurement;
Journal_Title :
Electrical Insulation Magazine, IEEE
DOI :
10.1109/MEI.2011.6059982
