Power transformer primary current and secondary current
Once refers to the power side, the second refers to the load side
Do not know what the specific content of the question you ask? If the relationship between the variable and the ratio, then the secondary current and primary current ratio of the transformer for a second and second turns ratio, the need for specific problems.
For three-phase transformers: Transformer rated capacity = root number 3 X Transformer rated current X Transformer rated voltage
So the rated current of the transformer = rated capacity of the transformer / (root 3 X transformer rated voltage)
Such as a 100kVA three-phase transformer, the primary voltage of 10kV, the secondary voltage of 0.4kV, then:
Its primary current: I1 = S / (1.732XU1) = 100 / (1.732X10) = 5.77 (A)
Its secondary current: 2 = S / (1.732XU2) = 100 / (1.732X0.4) = 144 (A)
