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May 05, 2023
How many kilowatt motors can a 200KVA transformer carry?
1. KVA is reactive power, kW is active power, and the coefficient in the middle is the power factor.
2. For electric motors, the power factor can be calculated as 0.9, which is 180kW motor.
3. The actual usage situation may be more complex, as multiple motors smaller than 180kW are commonly used,
In this case, the total power of all motors can be greater than 180kW, as long as the total power of motors operating simultaneously does not exceed 180kW
4. For extreme situations where the total power of a motor operating simultaneously exceeds 180kW, the transformer may not be damaged because it has a certain degree of overload resistance. For example, the overload capacity of an Oil Immersed Transformer is:
Overload of 10%, transformer can operate continuously for 180 minutes
Overload of 20%, transformer can operate continuously for 150 minutes
Overload of 30%, transformer can operate continuously for 120 minutes
Overload of 60%, transformer can operate continuously for 45 minutes
Overload 75%, transformer can run continuously for 15 minutes
Overload 100%, transformer can run continuously for 7.5 minutes
Overload 140%, transformer can operate continuously for 3.5 minutes
Overload 200%, transformer can run continuously for 1.5 minutes
5. A more complex situation is that the load on the power line not only includes the motor, but also other loads. The analysis method can refer to the above principles
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