This article by Salvador Magdaleno-Adame presents and analyzes the detection and analysis of a thermal failure in a core clamping bolt of a 5 MVAr gapped three-phase shunt reactor. High levels of specific gases were detected in this shunt reactor during its operation at a substation in Mexico, indicating potential overheating. Multiphysics finite element (FE) simulations showed this led to a short circuit, resulting in high temperatures. To mitigate future issues, the manufacturer of the shunt reactor decided to reinforce the insulation of the clamping bolts using fiberglass.
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