Transformers Magazine, Vol. 8 No. 3, 2021.
Izvorni znanstveni članak
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
Sažetak
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.
Ključne riječi
capacitive divider, NIFPS, OIP bushings, retrofit, tan δ
Hrčak ID:
261406
URI
Datum izdavanja:
8.7.2021.
Posjeta: 938 *