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Original scientific paper

Retrofitting of a 420 kV draw-lead type bushing with a draw-rod type – Part I

K.K. Murty
R.K. Gupta
C.B. Kushwaha
S.K. Chaturverdi


Full text: english pdf 1.272 Kb

page 128-138

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Abstract

On observation of deterioration of tan-δ value to 1.08 %, i.e., surpassing the limiting value of 0.7 % as defined in IEC60137 for the 420 kV OIP bushing for a 315 MVA, 400 / 220 / 33 kV
transformer located at substation Katni (India), a decision was made to replace the bushing. The replacement was risky, and it was a threat of causing the catastrophic failure for the transformer itself and
the colossal loss to the neighbouring equipment and structures.

Keywords

capacitive divider, NIFPS, OIP bushings, retrofit, tan δ

Hrčak ID:

261406

URI

https://hrcak.srce.hr/261406

Publication date:

8.7.2021.

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