Guiyang 33kV Dry Transformer Transformer Changneng

Description :

　　Dry type transformers are widely used in places such as local lighting, high-rise buildings, airports, and CNC machinery equipment at ports. Simply put, dry-type transformers refer to transformers whose iron cores and windings are not immersed in insulating oil.

　　Working environment of dry-type transformer:

　　1. 0-40 (℃), relative humidity<70%;

　　2. Altitude: not exceeding 2500 meters;

　　3. Avoid exposure to rainwater, moisture, high temperature, high heat, or direct sunlight. The distance between its heat dissipation ventilation holes and surrounding objects should not be less than 40cm;

　　4. Prevent working in places with corrosive liquids, gases, dust, conductive fibers, or metal shavings;

　　5. Prevent working in places with vibration or electromagnetic interference;

　　6. Avoid long-term inverted storage and transportation, and avoid strong impact.

　　Dry type transformer structure type:

　　The iron core is mainly composed of silicon steel sheets and coils cast with epoxy resin. Insulation cylinders are placed between high and low voltage coils to increase electrical insulation, and the coils are supported and constrained by cushion blocks. The fasteners used for component overlap have anti loosening properties.

　　Construction performance:

　　⑴ Solid insulation encapsulated winding;

　　⑵ Do not encapsulate the winding.

　　Winding: Among the two windings, the one with higher voltage is the high-voltage winding, and the one with lower voltage is the low-voltage winding.

　　From the relative position of the high and low voltage windings, high voltage can be divided into concentric and overlapping types.

　　Concentric windings are simple and easy to manufacture, and all adopt this structural method.

　　Overlapping type, mainly used for special transformers.

　　Characteristics and structure of dry-type transformer:

　　1、 Temperature control system:

　　The safe operation and service life of dry-type transformers largely depend on the safety and reliability of the transformer winding insulation.

　　2、 Cooling method:

　　The cooling methods for dry-type transformers are divided into natural air cooling (AN) and forced air cooling (AF). During natural air cooling, the transformer can operate continuously for a long time at its rated capacity. When forced air cooling is used, the output capacity of the transformer can be increased by 50%. Suitable for intermittent overload operation or emergency overload operation; Due to the significant increase in load loss and impedance voltage during overload, it is in a non economic operating state and should not be subjected to long-term continuous overload operation.

　　Dry type transformer form:

　　1. Open type: It is a commonly used form, with its body in direct contact with the atmosphere, suitable for relatively dry and clean indoor environments (when the ambient temperature is 20 degrees, the relative humidity should not exceed 85%), and generally has two cooling methods: air self cooling and air cooling.

　　2. Closed type: The device is located inside a closed shell and does not come into direct contact with the atmosphere (due to poor sealing and heat dissipation conditions, it is mainly used for mining and belongs to the explosion-proof type).

　　3. Casting type: using epoxy resin or other resin casting as the main insulation, it has a simple structure, small volume, and is suitable for transformers with smaller capacities.

　　Shandong Changneng Transformer Manufacturing Co., Ltd. always adheres to the development philosophy of "advocating science, focusing on quality, and being honest and trustworthy", and wholeheartedly provides excellent products and services for our customers.

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