10kV / 0.4kV Transformer — Primary/Secondary Rated Current
Field
Capacity S (kVA)
Primary I₁e (A)
Secondary I₂e (A)
Input:
—
—
Voltage
Note: Enter S only and/or change voltages. Quick factors: 40.5kV I₁e≈0.017S; 12kV I₁e≈0.06S; 7.2kV I₁e≈0.10S; when secondary is 0.4kV, I₂e≈1.443S.
Three-Phase Motor (0.4kV) Rated Current
Field
Power P (kW)
Rated Current (A)
Factor
Input:
—
I≈0.76P / 0.4kV ⇒ I≈1.9P
Considering η and cosφ combined, take Ie≈0.76·P / U(kV). For 0.4kV: I≈1.9·P (A).
Single-Phase Motor (220V) Rated Current
Field
Power P (kW)
Rated Current (A)
Factor
Input:
—
Quick rule: I≈5.7P (A)
Note: Results are quick estimates; refer to datasheets for exact values. η and cosφ will affect current.