Transformer Voltage And Current Formula

If the transformer is rated in mva means the formula will be.

Transformer voltage and current formula. The current transformer c t. I a s mva 1000000 v v the transformer has two current one is primary current and another one is secondary current. 2 we have a transformer with an output current on the secondary coil of 30 a and an input current on the primary coil of 2000 turns of 6 a determine the number of turns on the secondary coil. Primary current in amps i p a s kva 1000.

Is a type of instrument transformer that is designed to produce an alternating current in its secondary winding which is proportional to the current being measured in its primary current transformers reduce high voltage currents to a much lower value and provide a convenient way of safely monitoring the actual electrical current flowing in an ac. 5 is a reasonable approximation for the typical commercial transformer with voltage ratio and winding turns ratio both being inversely proportional to the corresponding current ratio. Again confirming that the transformer is a step down transformer as the primary voltage is 240 volts and the corresponding secondary voltage is lower at 80 volts. This is called the emf equation of transformer which shows emf number of turns is same for both primary and secondary winding.

V s the secondary voltage. N p the number of turns in the primary winding. When the transformer is connected to a load the secondary current i 2 produces a demagnetizing flux proportional to the secondary ampere turns i 2 n 2. A 50 kva single phase transformer has a 4000 v primary and a 400 v secondary.

A transformer has 1000 turns on the primary winding and 200 on the secondary. N s the number of turns in the secondary winding. A transformer with no power losses in which primary volt amperes. If the applied voltage is 250 v calculate the output voltage of the transformer.

If you want to calculate primary current we should consider primary voltage only then the formula will be. Assuming an ideal transformer determine a the primary and secondary full load currents b the transformer turns ratio. I 2 secondary current. I s the secondary current.

I p the primary current. For an ideal transformer on no load e 1 v 1 and e 2 v 2. The formulae in fig. The ideal transformer identity shown in eq.

Then the main purpose of a transformer is to transform voltages at preset ratios and we can see that the primary winding has a set amount or number of windings coils of wire on it to suit the input voltage. We will use the two equations the first equation to determine the output voltage on the secondary coil and the second equation to determine the number of turns on the secondary coil.