CONSERVATOR TANK
CONSERVATOR TANK
(OP)
Can anyone tell me what the primary advantage in using a conservator tank on a substation power transformer is?
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RE: CONSERVATOR TANK
RE: CONSERVATOR TANK
The do a better job at maintaining reliable and consistent positive pressure than a a sealed nitrogen system.
They may allow some devices for detective fault gases not available in other types of transformers (gas accumulation relay and buchholz).
(The initial cost is probably a little higher for a conservator system).
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RE: CONSERVATOR TANK
Also you can expect to see different behavior in fault gases measured by DGA since the headspace on top of transformer is not there in a conservator. I'm not sure if this is advantage or disadvantage... just different.
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RE: CONSERVATOR TANK
My own gut feeling is I would prefer having a sealed system with an N2 bottle to change, than having the oil exposed to outside air.
I know the conservator tank allows the use of the Buchholz relay to detect dissolved gases in the oil, but with the advent of modern electronic dissolved gas systems, wouldn't a sealed N2 system with such a gas detection system be preferable to an air-breathing conservator tank?
RE: CONSERVATOR TANK
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RE: CONSERVATOR TANK
One design uses another oil chamber to keep moist air away from the transformer oil. Air>oil>N2>transformer oil. DGA from this transformer shows high O2, so this method is not as effective.
We had a bladder fail at an industrial substation (no dehydrating breather). I believe the quality of the atmosphere hastened it's demise.
I like the N2 blanket with a bottle, gages, and alarms. No bladder to fail, and if a bushing gasket should leak, it will leak N2 rather than oil, and the condition is alarmed.
RE: CONSERVATOR TANK