Transformer full-load current calculator

Electrisim

Transformer

Type

Three-phaseSingle-phase

Rated power S_r

kVA

Short-circuit voltage u_k

Optional, from the nameplate. Used for the fault current.

Primary voltage

Line-to-line for three-phase.

Secondary voltage

For example 0.4 kV or 0.48 kV.

Secondary full-load current

—

Primary: —

Check the inputs: positive power and voltages, and u_k between 0 and 100 % (or empty).

Primary full-load current: —
Secondary full-load current: —
Voltage ratio: —
Secondary fault current (infinite source): —
Fault level at the secondary: —

Fault current at the secondary terminals with an infinitely strong upstream network and no voltage factor: the most the transformer lets through. For IEC 60909 with the network impedance, use the short-circuit calculator.

Free calculator by Electrisim · How it works