The transformer is the main point of power that can step down to use the device like as lightnings, motors, Air-conditioning, printer, computer…etc.

Here is the calculation of the transformer’s power that we known already about:

**AMPS**: Amperage or Amps provided by an electrical service is the flow rate of electrical current that is accessible. Accurately, Amps = Watts / Volts. (Amps = Watts divided by Volts)

**Volts:** Volt, properly, is defined as the potential difference across a conductor when a current of one ampere dissipates one watt of power that conductor is able to delivering more energy to the user. Accurately Volts = Watts / Amps. (Volts equals Watts divided by Amps).

**KVA:** KVA stands for Kilo Volt Amps, which is calculated by a volt and amp meter. KVA is for clear power. kVA is used to compute what size wiring you need, what size breaker, etc, to power a circuit of a given amperage/wattage. KVA rating is higher than the wattage on an AC circuit.

**Transformer’s Power Calculation for 3 Phase Voltage**

In case, We know I :

that: U = 400V, I = 100A, Cos? = 0.8

So, P_{Load }= 55,425.60 W, Then

Then we get,** **S_{Tr }= 69,282.00 VA

The other way, we calculate I easy way that we know S_{Tr}

_{That K = 1.44, Why we say K equal 1.44, because of K = 1000/(400*1.73)}

_{and }S_{Tr }= 69,282.00 VA = 69.282 kVA

so we get I = 99.8A

**Transformer’s Power Calculation for 1 Phase Voltage**

_{In case, we know I :}

_{that U = 230V, I = 100A, }Cos? = 0.8

So, P_{Load }= 18,400.00 W, Then

Then we get,** **S_{Tr }= 23,000.00 VA

The other way, we calculate I easy way that we know S_{Tr}

_{That K = 4.34, Why we say K equal 4.34, because of K = 1000/230}

_{and }S_{Tr }= 23,000.00 VA = 23 kVA

So we get I = 99.8 A

1 responses to How to calculate transformer powerSound great to learn more about physic and electric. It is so useful for all people to understand about the electricity so that they can be careful before using it.

Appreciate !

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