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Transformer lifecycle: Short-circuit withstand capability of power transformers – Part II

René Smeets


Puni tekst: engleski pdf 905 Kb

str. 80-85

preuzimanja: 555

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Sažetak

This article discusses verification of the ability of a transformer to survive short circuit. Fault current leads to large axial and radial forces on windings, which have to be managed by proper structural design. Test experience, showing a failure rate of 20-25 % of well-prepared transformers, suggests that the highest degree of reliability with respect to short-circuit withstand verification is ensured through full-scale testing in accordance with the international standards. The prime failure mode is winding deformation, but many other deficiencies, which would not be discovered in a design review, have also been observed.

Ključne riječi

transformer; short circuit; testing; certification; reliability

Hrčak ID:

202460

URI

https://hrcak.srce.hr/202460

Datum izdavanja:

8.7.2017.

Posjeta: 929 *