# How many amps is a 150kva transformer?

Contents

## How do you tell how many amps a transformer is?

If for some reason you need a larger transformer to operate appliances, you still divide the wattage by the voltage to find the current. For a 120-volt primary, 2000-watt transformer, divide 2000 by 120 for the current (2000 Watts /120 volts =16.67 amps). For a 240-volt, 3000-watt transformer, the current is 12.5 amps.

## How do I convert kVA to amps?

Calculation with line to line voltage

1. S(kVA) = √3 × I(A) × VL-L(V) / 1000.
2. So kilovolt-amps are equal to √3 times amps times volts divided by 1000.
3. kilovolt-amps = √3 × amps × volts / 1000.
4. kVA = √3 × A ⋅ V / 1000.
5. S = √3 × 12A × 190V / 1000 = 3.949kVA.

## How many amps is a 25 kVA transformer?

Three Phase Transformer

KVA 208V 480V
20 56.6 24.1
25 69.5 30.1
30 83.4 36.1
37.5 104 45.2

## What is the rated current of a transformer?

A transformer with a 100 VA rating, for instance, can handle 100 volts at one ampere (amp) of current. 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.

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## 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

## How many amps is 3kVA?

KVA is equal to the square root of 3 (1.732) times amps times volts, divided by 1,000. Amps is the flow of electricity as an electrical current.

kVA To Amps.

Select phase Kilovolt-amps (kVA) Volts (V)
Single phase 5 kva to amps 4 volts
Single phase 6 kva to amps 5 volts
Single phase 7.5 kva to amps 6 volts

## How many kVA is 20 amps?

Amp. to kVA, table for conversion, equivalence, transformation (Voltage = 220, AC, 3F):

How many Amps are: Equivalence in kVA
10 Amps Equivalent to 3.81 kVA
20 Amps 7.62 kVA
30 Amps 11.43 kVA
40 Amps 15.24 kVA

## What is 300 kVA in amps?

kVA to amperes, table for conversion, equivalence, transformation (3F, 220Volt) :

How many kVA are: Ampere Equivalence
90 kVA 236.19 Amp.
100 kVA 262.43 Amp.
200 kVA 524.86 Amp.
300 kVA 787.30 Amp.

## What size breaker do I need for a 75 kva transformer?

The rated current of the transformer can be used as the basis for a breaker. The rated current of a 3 phase, 75 kva transformer is 112 Amps, which is 25% of the rated current of a 125 Amp breaker.

## What size transformer do I need for a 100 amp service?

It’s very common to see a 100 amp breaker in a 480 panel feeding a 75 KVA transformer and a 225 amp main in the 120/208 panel. Just a short note here, the 480 side needs 3 wires and a ground, no neutral. The 120/208 side will need 4 wires and a ground. All grounds tie together.

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## What size breaker do I need for a 45 kVA transformer?

For a 45kVA transformer, 125A×1.25=156A, so use a 175A protection device.

## How many amps is 37.5 kVA?

kVA to Amps Conversion Chart

kVA kW 220 V
18.7 kVA 15 kW 49.1 A
25 kVA 20 kW 65.6 A
31.3 kVA 25 kW 82.1 A
37.5 kVA 30 kW 98.4 A