Transformer Primary and Secondary Current Calculator & kVA to I

Transformer Current Calculator:

Just enter the number of phases, transformer rating in VA/kVA/MVA, the voltage of the primary winding or the primary current, then press the calculate button to get the secondary and primary current.
Also, you can find the type of transformer either step down or step.

Reset Button to uses to clear the value to default 20kVA. You can change the value from the default to the current to be calculated.

Transformer Current Calculator









The transformer is a static device and which help you to transformer energy without changing its nature and frequency. It is operating under faradays electromagnetic induction principle. Current flows through the primary winding and the secondary winding cut the flux produced by primary, hence emf will be induced in the secondary winding.

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Let us assume,

I(Primary) = Primary current in Amps

I(secondary) = Secondary current in Amps

V(primary) = Primary Voltage in Volts

V(secondary) = Secondary Voltage in Volts

Transformer current calculations:

Transformer turns ratio,

V(primary) * I(Primary) = V(secondary) * I(secondary)

The primary voltage is equal to the product of the secondary voltage and primary current divided by secondary current.

V(primary) = V(secondary) * I(Primary) / I(secondary)

The secondary voltage is equal to the product of the primary voltage and primary current divided by secondary current.

V(secondary) = V(primary) * I(Primary) / I(secondary)

The primary current is equal to the product of the secondary voltage and secondary current divided by primary current.

I(Primary) = V(secondary) * I(secondary) / V(primary)

The secondary current is equal to the product of the primary voltage and primary current divided by secondary voltage.

I(secondary) = V(primary) * I(Primary) / V(secondary)

 Transformer kVA to current calculations:

kVA = V(primary) * I(Primary)

Hence

I(Primary) = kVA / V(primary)

Hence the transformer primary current is equal to kVA divided by the primary voltage of the transformer

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