Transformer above the cylindrical storage tank, is the oil conservator, role is transformer due to load, temperature, oil tank oil expansion, then too much oil flows into the oil tank, low temperature, oil pillow in the oil will flow into the fuel tank, to automatically adjust the oil surface.
When the transformer oil with the volume of oil temperature expansion or reduction, oil pillow can adjust the amount of oil in the oil tank of the transformer, to ensure regular oil filled function.
If there is no oil tank, oil in the oil tank surface fluctuations will bring the following adverse factors:
One is reduced when the oil surface exposed iron core and the coil will affect heat and insulation;
The two is with the oil surface fluctuation of air from the box out of and into the seam, and because the temperature is very high, so the oil quickly oxidation and damp. Oil tank oil tank surface to surface ratio is small, such, can reduce the oil and air contact surface, preventing the oil is too fast to oxidation and damp.
Three is the oil tank oil in almost does not participate in the tank of the circulation, its temperature than the tank of the upper oil temperature is much lower, oil oxidation process is also much slower, therefore the oil conservator, can prevent oil oxidation rate.
Transformer oil conservator has three kinds of forms : wavy, capsule, diaphragm.