What are the Magnetic Circuit Failures of Transformers?

What are the Magnetic Circuit Failures of Transformers?

1.If the insulation pad on the wear heart screw crushed or wear heart outside screw bandage insulation is too thin, plywood and core insulation board is too thin or have crack, is likely to cause heart screws or splint with iron core collision, core short circuit happens, there will be a lot of current caused by local overheat, sometimes even melt iron core, plywood, and may cause fire in the insulation.

2.The insulation damage between the silicon steel sheets causes eddy currents to increase, which leads to local overheating or even melting, and increases the winding temperature.

3.The iron core is not grounded or poorly grounded, under the induction action of the winding to produce a certain voltage, so that the iron core and the grounding of the tank between the intermittent discharge, this discharge in the oil to increase the carbon slag, so that the transformer oil metamorphism.