Transformer cooling method AN stands for what
The cooling mode of the transformer is determined by the cooling medium and the circulation mode. Dry-type transformer cooling method is divided into natural air cooling (AN) and forced air cooling (AF); oil-immersed transformers commonly used cooling methods are generally divided into three types: oil-immersed self-cooling, oil-immersed air-cooled, forced oil circulation.
The cooling mode of the transformer is determined by the cooling medium and the circulation mode. Dry-type transformer cooling method is divided into natural air cooling (AN) and forced air cooling (AF); oil-immersed transformers commonly used cooling methods are generally divided into three types: oil-immersed self-cooling, oil-immersed air-cooled, forced oil circulation.
The cooling mode of the transformer is determined by the cooling medium and the circulation method. Since the oil-immersed transformer is also divided into the internal cooling mode of the tank and the external cooling mode of the tank, the cooling mode of the oil-immersed transformer is represented by four letters.
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The first letter: the cooling medium in contact with the winding.
O -------- mineral oil or ignition of more than 300 ℃ of insulating liquid;
K -------- Insulation liquid with ignition point greater than 300 ℃;
L -------- ignition can not be measured insulation liquid;
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The second letter: the way the internal cooling medium is circulated.
N -------- The oil flow flowing through the cooling equipment and the windings is a natural thermal convection cycle;
F -------- The oil flow in the cooling equipment is forced to circulate and the oil flow flowing through the windings is the thermal convection cycle;
D -------- The oil flow in the cooling equipment is forced to circulate, at least in the main winding oil flow is forced to guide the cycle;
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Third letter: external cooling medium.
A -------- air;
W -------- water;
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The fourth letter: the way the external cooling medium is circulated.
N -------- natural convection;
F -------- Forced circulation (fan, pump, etc.).
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Therefore, the transformer cooling method AN represents the air convection cooling method.
