Tap Changer University


We can provide a one day seminar on tap changers:

DC testing transformers
 learn about intricacies of dc winding resistance testing transformers

OLTC  Fundamentals
principles of operation of OLTC
     resistance and reactance types
     arcing tap switch
     diverter selector
     vacuum types

OLTC  Diagnostics:    DVtest
dynamic recording of tap changer operation 
     evaluation of dynamic graphs in order to pinpoint defects of OLTCs

OLTC  Diagnostics:    DGA
key gases for different OLTC types
     gas ratios and methods of evaluation
DVtest Case studies from the AMforum Knowledge Base
     mechanical, electrical defects,
     contact problems, coking, wear


Levico,  Incorporated 1995        Back         Home