Local Faults And Repair Process of Transformer Core 2026-05-28
If there are only a few shorted laminations and the damage is not deep, a special scraper can be used to remove the adhering burrs, followed by applying varnish. Take this opportunity to remove all core bolts from the core limb and replace them with non-woven (glass fiber) bands for binding and clamping purposes. However, care must be taken to ensure the non-woven binding bands are not too thick, to avoid interfering with the winding installation. Generally, the thickness of the non-woven binding bands for distribution transformers should be kept between 1 to 2 mm. If necessary, multiple bands can be added to reduce the thickness of each individual band.
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