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OLTC Contact Aging with Dynamic resistance Measurement


Dhrupad B Purohit , Parul institute of engineering and technology; Deepa Karvat, Parul institute of engineering and technology


Condition assessment, Contact degradation, OLTC, DRM


It is known that aging of OLTC contacts is the main reason for the failure of power transformer. It is seen that OLTC is passed through several aging mechanisms in its life. It is important to understand the aging mechanism to develop any method like DRM for condition assessment of OLTC. The life of OLTC contacts includes clean contacts, contacts with an oil film layer and contacts with cocking. Here it is shown that DRM method is very sensitive to aged change over selector contact of an OLTC.

Other Details

Paper ID: IJSRDV2I3006
Published in: Volume : 2, Issue : 3
Publication Date: 01/06/2014
Page(s): 1662-1664

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