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