What is the secondary output of a 45 kVA transformer?

How many output amps is a 45 kVA transformer?

Three Phase Transformer

KVA 208V 240V
45 125 108
50 139 120
60 167 145
75 208 181

How do you calculate current in a secondary transformer?

In other words, i1/i2 = V2/V1. For example, if the current and voltage drop through the secondary coil is 3 amps and 10 volts, and the voltage drop through the primary coil is 5 volts, then the current through the primary coil is 10/5 * 3 = 6 amps. So the secondary has less voltage and more current.

How do you calculate the amp output of a transformer?

Divide the wattage by the voltage. For example, if you have a 300-watt lighting transformer and you are going to hook it up to a standard 120-volt socket, divide 300 by 120. The transformer will draw 2.5 amps of current.

What size breaker do I need for a 45 kVA transformer?

For a 45kVA transformer, 125A×1.25=156A, so use a 175A protection device.

How do you calculate the output voltage of a transformer?

Divide the number of secondary windings by the number of primary windings, and multiply the source voltage by this ratio. This will give you the output voltage.

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How do you calculate secondary phase voltage?

Primary phase voltage = 2,400 divided by 1.73 = 1,387 V. Secondary phase voltage = 1,387 divided by 10 = 139 V. Secondary line voltage = 139 V multiplied by 1.73 = 240 V.

What is the secondary voltage of a transformer?

Secondary voltage is the coil winding supplying the output voltage. The output voltage of a transformer varies some with varying load resistances, even with a constant voltage input.

What is the secondary current?

(Elec.) a momentary current induced in a closed circuit by a current of electricity passing through the same or a contiguous circuit at the beginning and also at the end of the passage of the primary current.

How do you calculate secondary full load current?

Transformer

  1. Transformer full load current = kVA / (1.732 x Volt)
  2. Transformer full load current = 1000 / (1.73 2× 480) = 1203 Amp.
  3. Short circuit current at TC secondary (Isc) = Transformer full load current / Impedance.
  4. Short circuit current at TC secondary = 1203 / 5.75 = 20919 Amp.