**Contents**show

## How do you size a transformer?

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. The required transformer would be a 750VA or .

## How many kVA is a transformer?

The kVA unit represents kilovolt-amperes, or **1,000 volt-amperes**. A transformer with a 1.0 kVA rating is the same as a transformer with a 1,000 VA rating and can handle 100 volts at 10 amps of current.

## Why is the transformer rated in kVA?

**The copper and iron are the two types of losses that occur in the transformer**. The copper loss depends on the current (ampere) flows through the windings of the transformer while the iron loss depends on the voltage (volts). i.e., the rating of the transformer is in kVA.

## What are the 2 types of transformers?

There are two types of potential transformers; **the conventional wound type (or electromagnetic type) and the capacitor voltage (potential) transformer**. For voltages exceeding 100 kV (phase) the conventional type of potential transformer becomes extremely expensive owing to the insulation requirements.

## How many amps is 15kva?

kVA To Amps

Select phase | Kilovolt-amps (kVA) | Volts (V) |
---|---|---|

Single phase | 15 kva to amps | 8 volts |

Single phase | 20 kva to amps | 9 volts |

Single phase | 25 kva to amps | 10 volts |

Single phase | 30 kva to amps | 11 volts |

## How many amps is 30kva?

kVA To Amps Calculator (With Table)

kVA (Apparent Power) | Voltage (220 V) | Amperage (A) |
---|---|---|

How many amps is 5 kVA? | 220 V | 22.73 Amps |

How many amps is 10 kVA? | 220 V | 45.45 Amps |

How many amps is 20 kVA? | 220 V | 90.91 Amps |

How many amps is 30 kVA? | 220 V | 136.36 Amps |