RODALCO
Well-Known Member
On big substation transformers proper protection is in place in the form of a Buchholtz relay.
Usually arcing causes ehtylene gas and carbon CO, and CO2
This one collects gas and if a certain amount has filled up a chamber in between the main tank and header tank, it triggers an alarm, if not actioned it trips the supply to the TX.
If a serious arc causes a lot of gas and expansion the Buchholtz relay will trip the supply immidiately.
Additional alarms are for overcurrent, oil temperature, winding temperature and restrictive earth faults.
Usually arcing causes ehtylene gas and carbon CO, and CO2
This one collects gas and if a certain amount has filled up a chamber in between the main tank and header tank, it triggers an alarm, if not actioned it trips the supply to the TX.
If a serious arc causes a lot of gas and expansion the Buchholtz relay will trip the supply immidiately.
Additional alarms are for overcurrent, oil temperature, winding temperature and restrictive earth faults.