An oil immersed distribution transformer with a winding temperature control function

An oil immersed distribution transformer with a winding temperature control function. A box is arranged outside the oil-immersed distribution transformer; a transformer winding is arranged in an inner cavity of the box; the top of the box is fixedly provided with a wiring board outlet box; the transformer winding is provided with a temperature control sensor; the wiring board outlet box comprises a box body; a sealing plate is in sealed connection with the top opening of the box body; side plates of the box body are provided with outlet holes; a bottom plate of the box body is provided with wire holes; control wires of the temperature control sensor penetrate through the wire holes and the outlet holes and are connected with an outside computer. The temperature change of the winding inside the oil type transformer can be monitored, the safety and reliability in the using process are improved, and the fault rate is effectively reduced.

Features of oil immersed transformer

1.The core of imported high permeability, low loss, cold-rolled high-quality silicon steel sheet manufacturing, reducing the no-load loss, energy saving significantly. To the nineties the international advanced level.

2.Farady oil immersed transformer with high security and reliability.

3.The oil type transformer with a advanced structure, small size, light weight, low noise, low temperature, anti-corrosion.

4. reliable anti-leakage measures to prevent leakage of oil phenomenon.

The structure of oil immersed distribution transformer

The oil immersed distribution transformer core is built up of cold rolled oriented grain steel sheet with low specific losses, insulated on both sides by a thin inorganic coating. Uniform pressing, stiffness and solidity of the columns assure a low noise level. the polemounted transformers are filled with mineral oil, according to IEC standards. The oil is previously treated and dried. Upon demand, filling can be made by using insulating silicon oil or vegetable and biodegradable.

Farady oil immersed transformer for industrial

Distribution transformer(oil immersed transformer) for industrial and mining enterprises and civil building one of the important equipment in power supply and distribution system, it will be 10 (6) kV or 35 kV voltage drop to network users use 230/400 v bus voltage. Such products applied to ac 50 Hz (60), maximum rated capacity of 2500 kva three-phase (single phase maximum rated capacity of 833 kva, single phase transformer is generally not recommended), can be used in indoor (outside), when capacity of 315 kva and below can be installed on the pole, environment temperature is not higher than 40 ℃, no less than 25 ℃, the highest daily average temperature 30 ℃, the highest annual average temperature is 20 ℃, relative humidity less than 90% (environment temperature 25 ℃), the altitude does not exceed 1000 m. If the above conditions are not in conformity with the above conditions, the relevant provisions of gb650-86 shall be adjusted accordingly.

Oil immersed distribution transformer installation site selection

installation: oil immersed distribution transformer can be installed one way of hanging rod, pole selection of 12 m or 15 m heavy cement rod cement pole. 

installation site selection: After investigation, we found that single-phase distribution transformer installation site less restricted by geographical factors, the nature of the load factors and more. In general: 

When the 11kv single phase transformer power supply radius is too large, causing the end of the supply voltage is low, affecting the normal use of electricity users, in single-phase power supply end of the installation of distribution transformers, cutting low voltage network, reducing the radius of low-voltage power supply, solve the problem of low voltage users.When the three-phase distribution transformer overload, according to the load characteristics, select the appropriate extensions installed single-phase distribution transformers, cutting transfer of load, solve the problem compatibilization 

in the residential area where non-user installation of three-phase power distribution transformers single-phase power supply to the residents, can shorten the radius of low-voltage power supply, reduce loss in load density, widely distributed, without the user’s place of three-phase power distribution transformers installed single-phase power supply, saving investment, power point to solve the problem. 

Performance of oil immersed transformer

A, oil immersed transformer low-voltage winding in addition to small capacity using copper wire, the general use of copper foil around the cylindrical structure; high-voltage winding using multi-layer cylindrical structure, so that the winding ampoule distribution balance, magnetic flux leakage Small, high mechanical strength, anti-short circuit capability.

B, core and winding each with a tightening measures, the device body height, low voltage lead and other fastening parts are self-locking lock nut, using a non-hanging structure, can withstand the transport of the shock.

C, coil and core using vacuum drying, farady transformer oil using vacuum oil and oiling process, so that the transformer internal moisture to a minimum.

D, fuel tank with corrugated sheet, it has a breathing function to compensate for changes in temperature caused by changes in the volume of oil, so the product is no oil conservator, obviously reduced the height of the transformer.

E, because the corrugated plate replaced the oil conservator, so that the transformer oil and the outside isolation, so as to effectively prevent the oxygen, water into the lead to the decline in insulation performance.

F, according to the above five performance to ensure that the oil-immersed transformer in the normal operation does not need to change the oil, greatly reducing the maintenance costs of the transformer, while extending the life of the transformer.