Talking about How to Choose the Capacity of Oil-immersed Power Transformer

2019-05-20 11:17:35 JUKE CHINA ODM OEM Transformer factory Read

Talking about How to Choose the Capacity of Oil-immersed Power Transformer

 Power Transformers such as S11, S9, and S7, whether oil-immersed or dry, have the same criteria for determining the capacity of oil-immersed power transformers, and are determined by rated voltage and current. The power transformer is generally three-phase, and the capacity of the three oil-immersed power transformer is equal to three times the voltage multiplied by the root of the current. Of course, when the voltages are equal, the size of the oil-immersed power transformer is only different from the current, that is, the thickness of the wire.
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The capacity of the oil-immersed power transformer is one of the important equipments in the power supply and distribution system of industrial and mining enterprises and civil buildings. It reduces the network voltage of 10(6)kV or 35kV to the 230/400V bus voltage used by users. Oil-immersed power transformer capacity is suitable for AC 50 (60) Hz, three-phase maximum rated capacity 2500kVA (single-phase maximum rated capacity 833kVA, generally not recommended for single-phase transformer), can be used indoors (outside), capacity is 315kVA And the following can be installed on the pole, the ambient temperature is not higher than 40 ° C, not lower than -25 ° C, the highest daily average temperature is 30 ° C, the highest annual average temperature is 20 ° C, the relative humidity is not more than 90% (ambient temperature 25 ° C) The altitude does not exceed 1000m. If it does not conform to the above conditions of use, the appropriate quota adjustment shall be made in accordance with the relevant provisions of GB6450-86.
 
For the capacity of oil-immersed power transformers, the capacity of various power-using equipment should be integrated to calculate the calculated load (generally without the fire load). The apparent capacity after compensation is the basis for selecting the capacity and number of oil-immersed power transformers. . Generally, the load factor of the transformer is about 85%. This method is simpler and can be used for estimating capacity.
Electricity load
GB/T17468-1998 "Power Transformer Selection Guide", the recommended oil-immersed power transformer capacity selection, should be in accordance with GB/T15164-94 "oil-immersed power transformer load guidelines" or GB/T17211-1998 "dry power Transformer Load Guidelines and calculate the load to determine its capacity. The above two guidelines provide a computer program and a normal cycle load map to determine the distribution transformer capacity.
 Hunan Chuanglian Huitong Transformer Factory specializes in producing all kinds of oil-immersed power transformers. The products are certified by CE, ISO9001, etc. The performance is stable and durable.