recorded interpretation ensuring reliable regularly monitoring fundamental aspect measured bdv breakdown occurs applied gradually industry standards standards adherence bdv significance oxidation processes higher bdv conducts electricity standard procedure crucial parameter dielectric strength critical component oil filtration oil breaks oil sample power systems high voltage identified early metallic particles electrodes immersed standardized gap transformer maintenance efficient operation factors affecting bdv prepared oil sample oil bdv testing efficient transformer operation electrodes voltage application withstand high voltage transformer oil utilities optimize transformer performance standardized test cell remove solid particles optimizing maintenance schedules reasons early detection power transformers serves make informed decisions timely testing engineers transformers conservator tank superior insulating properties