Know the rated capacity of the transformer, how to calculate its rated current?
Low-voltage 400V distribution transformer speed calculation: per thousand volts by 1.44A, per thousand kVA of 144 ac current calculation.
Formula algorithm:
Three-phase transformer current I = Pe / Ue / √3
Single phase transformer current I = Pe / Ue
E.g:
10KV / 0.4KV, 100KVA transformer, low voltage rated current: I = 100 / (1.732 * 0.4) = 144.34A
If it is a power transformer, its calculation method: rated current = rated capacity ÷ root 3 ÷ output voltage
Such as the rated capacity of 1250KVA, the rated current = 1250000 ÷ 1.732 ÷ 400 = 1804A
