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Iron core: The iron core is a cold-rolled silicon steel sheet with high permeability magnetic grain orientation. The iron core is a new type of iron core, a full oblique joint stacking type iron core. The iron core column is a circular section of multi-stage steps, and the iron yoke and the iron core are equal sections.
Winding: The winding adopts corrugated oil channel, no paint dipping process, tight tape binding; The windings are concentric coils: the high voltage winding has a tap required for the tapping voltage, which is led to the tap-changer, the switch is installed on the box cover, and the tap voltage can be changed after the power supply is disconnected.
Safety protection device: A 30~2000kVA transformer is equipped with a voltage relief valve; Gas relays with alarm and tripping terminals can be installed according to user requirements.
Oil temperature measuring device: the transformer is equipped with a glass thermometer tube base, the tube base i located on the top of the tank, and extends into the oil 120±10mm;1000~2000kVA transformer equipped with outdoor signal thermometer;
Transformer oil tank: The transformer oil tank is composed of corrugated walls, and the surface is sprayed with dust, and the paint film is firm. The corrugated heat sink not only has a cooling function, but also has a "breathing "function, and the elasticity of the corrugated heat sink can compensate for the change in the volume of transformer oil caused by the temperature rise and fall. Therefore, the fully sealed transformer has no oil storage tank, reducing the overall height of the transformer. When the transformer is packaged, the vacuum oiling process is used to completely remove the moisture in the transformer, and the transformer oil does not contact the air. It can effectively prevent the oxygen and moisture from invading the transformer and lead to the deterioration of the transformer insulation performance and the transformer oil aging, so the oil sample test is carried out from time to time.
