As for this oil-immersed transformer, our company has made many improvements to the traditional structure and materials, such as the following:
Spiral coils with longitudinal oil channels for better internal heat dissipation;
Improved effective support of the coil ends for better resistance to short-circuit currents;
New lifting and body positioning structures to ensure greater reliability during long-distance transport and operation.
High-quality silicon steel sheet is used, lower loss per unit, lower no-load loss of the transformer;
High-quality laminated wood insulation parts are used, never crack, even under the action of short-circuit current, it does not move;
Deep filtered transformer oil is used, lower level of water, gas and miscellaneous technology, the transformer works more reliably;
High-quality rubber sealing material is used, effective anti-aging, eliminating.
All raw materials are subjected to quality inspection and all raw material manufacturers are strictly examined according to the national standard ISO9000.
1.The S11 series oil-immersed transformer has reduced no-load losses by an average of 30% compared to the S9 series; the no-load current has been reduced by 70-85% compared to the S9 series; the average temperature rise has been reduced by 10K; the product life has been more than doubled and the product can operate for a long time even under 20% overload conditions, and the noise level has been reduced by an average of 2-4 dB.
2.S11(M)-in the M means oil tank adopts the full sealed structure. The full sealed structure distribution transformer is compared with an ordinary oil-immersed transformer, which doesn't have an oil storage cabinet. Oil tank wave fins instead of oil pipe as cooling components, produced by high-quality cold-rolled sheet in the special production line manufacturing. Wave fins can be changed by the volume of a transformer oil changing, so that the transformer and the atmosphere isolation, prevent and slow down the oil deterioration and insulation moisture, enhance operational reliability, normal operation maintenance-free.
3. As we know, the 11KV oil-immersed transformer and 33KV oil-immersed transformers are the most general in south-east Asia countries.
The oil-immersed transformer with a new type of insulation structure is adopted to improve the short-circuit resistance;
The iron core is made of high-quality cold-rolled silicon steel sheet;
The high-voltage windings are made of oxygen-free copper wire, and the multilayer circular structure is adopted;
Which lower resistivity is selected, and after a series of additional surface treatments, it is smoother, without burrs and sharp corners, so that the load loss of the transformer is lower and the electrical performance is more reliable.
All fasteners are made of special Anti-loose treatment.
Th oil type transformer has the characteristics of high efficiency and low loss, which can save a lot of power consumption and operating costs, and has significant social benefits. It is a high-tech product promoted by the country.
Transformer for power plants and substations is indispensable, so we have to ensure the machine works well and safely. Here let's understand how to maintain it.
Oil sample testing: pressure resistance, impurities, and other performance indicators every three years, the transformer's long-term full load or overload operation can shorten the cycle.
High and low voltage insulation resistance is not less than 70% of the original factory value (10MΩ), DC resistance of the winding at the same temperature, the difference between the average value of three phases should not be greater than 2%, and the results of the last measurement should not be greater than 2%.
Transformer working earth resistance value is measured once every two years.
Power outage cleaning, and inspection cycle, according to the surrounding environment and load situation to determine, generally once every six months to a year;
The main content is to clear the defects found in the inspection, porcelain casing cleaning, rupture or aging rubber gasket replacement, connection point inspection tightening, lack of oil replenishment oil, breather silicone inspection, and replacement, etc.