BTW, who is the tap-changer manufacturer? MR, ABB or other?
Don't forget to order the remote position indicator in the tap-changer motor drive units (usually BCD code or 4-20 mA, check it in the AVR manual). Check if you need one AVR per transformer or if you want to control several...
Does your transformer have a conservator or is it a hermetic (sealed) type transformer with a nitrogen "layer" above the oil? What is the volume of free air in the room? Does your PRD close when the pressure in the transformer goes below 8 psi? If you are so worried about the fire, why didn't...
