Table of Contents

- 1 How do you find the secondary current of a 3 phase transformer?
- 2 What is secondary voltage in transformer?
- 3 How do you find secondary current?
- 4 How do you calculate secondary voltage?
- 5 How do you find the voltage of a transformer?
- 6 How are primary and secondary windings connected in a single phase transformer?
- 7 What is the secondary voltage of a step down transformer?

## How do you find the secondary current of a 3 phase transformer?

Power rating in KVA (Kilo Volt Amperes), Primary voltage, Secondary voltage, Tap arrangement….

- Secondary voltages or Low Voltages (L.V) is 415 volts.
- Secondary Current (Current on Low voltages side) is 139.1 amps.
- KVA = (√3. V x I) /1000= (1.732 × 415 × 139.1)/1000=100 KVA.

**What is the secondary winding voltage?**

The secondary voltages are the same and proportional to the supply voltage, VP, therefore power in each winding is the same. The voltages produced across each of the secondary winding is determined by the turns ratio as shown.

### What is secondary voltage in 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.

**How do you calculate secondary current?**

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

## How do you find secondary current?

**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 secondary voltage?

Solve the equation Vs/Vp = Ns/Np where Vs is the secondary voltage, Vp is the primary voltage, Ns is the number of secondary windings and Np is the number of primary windings. Divide the number of secondary windings by the number of primary windings, and multiply the source voltage by this ratio.

**How do you convert primary voltage to secondary voltage?**

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

## How do you find the 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.

**What is the ∆-Y connection of the three phase transformer?**

The ∆-Y connection of the three winding transformer is shown in the figure below. The primary line voltage is equal to the secondary phase voltage. The relation between the secondary voltages is V LS = √3 V PS. The phasor diagram of the ∆-Y connection of the three phase transformer is shown in the figure below.

### How are primary and secondary windings connected in a single phase transformer?

The primary windings are connected in star and the secondary windings are connected in delta. A more convenient way of showing this connection is illustrated below. The primary and secondary windings shown parallel to each other belong to the same single-phase transformer.

**What is the voltage on each side of a 3 phase transformer?**

The line-to-line voltage on each side of the three-phase transformer is √3 times the nominal voltage of the single-phase transformer. The main advantage of a Y/Y connection is that we have access to the neutral terminal on each side and it can be grounded if desired.

## What is the secondary voltage of a step down transformer?

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.