**Contents**show

## How do you calculate the full load capacity of a transformer?

The full load current I_{(}_{A}_{)} in amps is equal **to 1000 times of transformer rating S _{(}_{kVA}_{)}** in kVA divided by the multiplication of root 3 times of line to line voltage V

_{(}

_{V}

_{)}in volts. V

_{(}

_{S-V}

_{)}= Secondary voltage in volts.

## How much load can a 30 kVA transformer handle?

Three Phase Transformer

KVA | 208V | 480V |
---|---|---|

25 | 69.5 | 30.1 |

30 | 83.4 |
36.1 |

37.5 | 104 | 45.2 |

45 | 125 | 54.2 |

## What is full load transformer?

By full load is meant the load (obviously, on secondary) which **would make transformer transfer it’s rated power from primary to secondary**. For example when 50 kVA is on full load, it would be transferring 50 kVA from primary to secondary. … means that there isn’t such load on secondary that can fully load transformer.

## How do you calculate transformer size?

Calculate an example as follows. A 120-volt motor has a load amperage of 5 amps. Multiply 120 volts times 5 amps this equals 600VA now lets multiply the 125 percent start factor. Take 600 times 1.25 this equals 720VA and most transformers are sized by a factor of **25VA** or 50VA.

## How many houses can a 100 kVA transformer handle?

8 – 500 kVA connects a nominal number of 103 customers, 100 kVA connects **14 customers**.

## How do you calculate full load current?

Full load current I, I =**P**. **/ 1.732 * V Amps**.

## What is the transformer formula?

**Vp=−NpΔΦΔt V p = − N p Δ Φ Δ t** . This is known as the transformer equation, and it simply states that the ratio of the secondary to primary voltages in a transformer equals the ratio of the number of loops in their coils.