Generator full load current calculator

Calculates the full load current of a single-phase or 3-phase generator.
Voltage (V)

Generator rating
  cosΦ

Parameters

How to calculate the full load current of a 3-phase generator?

The full load current for a 3-phase generator specified in kW is calculated as:

\(I=\displaystyle\frac{1000 \cdot S_{kW}} {\sqrt{3} \cdot V_{LL} \cdot \cos{\phi} }\)

Where, For example, calculate the full load current of a 50 kW, 480 V, 3-phase generator. The estimated load power factor is 0.85.

\(I=\displaystyle\frac{1000 \cdot 50} {\sqrt{3} \cdot 480 \cdot 0.85} \)

I = 70.8 A.

The full load current for a 3-phase generator specified in kVA is calculated as:

\(I=\displaystyle\frac{1000 \cdot S_{kVA}} {\sqrt{3} \cdot V_{LL} }\)

Where, For example, calculate the full load current of a 50 kVA, 480 V, 3-phase generator.

\(I=\displaystyle\frac{1000 \cdot 50} {\sqrt{3} \cdot 480 }\).

I = 60.1 A.

How to calculate full load current of a single-phase generator?

The full load current for a 1-phase generator specified in kW is calculated as:

\(I=\displaystyle\frac{1000 \cdot S_{kW}} { \cdot V_{LN} \cdot \cos{\phi} }\)

Where, For example, calculate the full load current of a 2 kW, 120 V, 1-phase generator. The estimated load power factor is 0.85.

\(I=\displaystyle\frac{1000 \cdot 5} { 120 \cdot 0.85} \)

I = 19.6 A.

The full load current for a 3-phase generator specified in kVA is calculated as:

\(I=\displaystyle\frac{1000 \cdot S_{kVA}} { \cdot V_{LN} }\)

Where, For example, calculate the full load current of a 2 kVA, 120 V, 1-phase generator.

\(I=\displaystyle\frac{1000 \cdot 50} { \cdot 480 }\).

I = 16.7 A.

Frequently asked questions

How to calculate the full load current of a generator?

For a three-phase generator, the full load current is calculated as I = 1000 × S / (√3 × V). Where, S is the generator rating in kilo-volt-ampere (kVA), and V is the generator rated voltage in volt (V). For a single-phase generator, the full load current is calculated as: I = 1000 × S / V. Try it with this calculator..

How many amps is a 3000 watt generator?

If it is a 3000 watt (3 kW), single-phase, 120 V generator, and the allowable load power factor is 0.8, then the current will be: I = 3000 / (120 × 0.8) = 31.25 A.

How many amps is a 10000 watt generator?

If it is a 10000 watt (10 kW), 3-phase, 120 V generator, and the allowable load power factor is 0.8, the current will be: I = 10000 / (√3 × 120 × 0.8) = 60.1 A. If it is a 3-phase- 240 V generator, the current will be: I = 10000 / (√3 × 240 × 0.8) = 30.1 A.

How many amps is a 7500 watt generator?

If it is a 7500 watt, single-phase 120 V generator, and the allowable load power factor is 0.8, the current will be: I = 7500 / (120 × 0.8) = 78.1 A.

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