Recent content by TechARA

Is it common to use oil rupture disk to depressurize power transformer cable box that is isulated from main transfomer tank? Thanks

I am looking for a good mechanism to vent sudden pressure in case of high energy arcing as a worst case scenario. I learned from your replies that PRD's do not handle sudden oil over pressures since high energy arcing creates over pressures exceeding preset pressure thresholds and the rate of...

Valuable information, thank you very much. Is it more practical to add additional pressure relief device or move the top one to be closer to cable termination. I think this will be more effective to prevent cable box flashovers. In case of two devices, can both devices be of the same size and...

Is it better to use gas insulated switchgear with vaccum circuit breaker or air insulate switchgear ?

Recently we have experience a flashover on a newly installed 100/133 MVA, 230/13.8 KV transformer cable box. The flashover happened two days after the transformer was energized in one high voltage (230 KV) oil filled cable box. An internal high energy arcing occurred in the transformer cable box...