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Formula for calculating power of dry type transformer

Release time:2020-11-07 09:09:44 Popularity: Source:未知

    

  Power equipment has a certain power, dry transformer operation speed needs such as the physical quantity of power, working speed is an important physical quantity and basic attribute of dry transformer, dry transformer selection should be based on the production characteristics and main labor intensity to determine whether the power of dry transformer qualified. In fact, based on many factors and various data, we can calculate the power of your dry-type transformer.

  In general, the power of single-phase transformer is obtained by using the total power * 120% (the efficiency is calculated as 80%). Then how to calculate the power formula of three-phase transformer? Engineers from dry-type transformer manufacturers can help you solve the problem in the following four ways (take 220V phase voltage and 380V line voltage for example) :

 

  1. Three-phase power rating = 1.732 * rated current * rated line voltage (380V) = 3 * Rated current * rated phase voltage (220V).

 
 
 
 
 
 
 
2. Three-phase power supply is different. It is calculated by multiplying the maximum power by 3. For example, phase A 9KW, Phase B 10KW, phase C 11KW, P = 3 * 11 = 33KW.
 
 
 
 
 
 
 
3. The transformer power factor is usually 0.8 (also 0.7). Then, in the above example, the total power of the transformer = 33/0.8 = 41.25kW.
 
 
 
 
 
 
 
4. According to the "Power Engineering Design Manual", for a single transformer with stable load, the transformer capacity is generally about 85%. Therefore, in the above example, the transformer capacity is 41.25/85% 48.53kW, and 50KVA transformer is selected.

 

  The above four points are the formula for calculating the power of dry-type transformer provided by the manufacturer. The power of dry-type transformer is related to the performance of all components designed by you. For dry-type transformer, more attention should be paid to quality and technology so that the dry-type transformer can get better power and better use effect. The above is the power calculation of the dry transformer, you can calculate the power of the dry transformer you use. Of course, there are some actual power and calculated power slightly error, as long as the national standard is not exceeded, are normal can.

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