# Your question: How do you calculate amps on a 3 phase motor

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Substitute the value of the power you need to convert (in watts), the value of the voltage (in volts), and the power factor to find the current (in amps). The current is 187 amps.

## How do you calculate amps on a motor?

Converting horsepower to amps can be done in a few simple steps, or using this simple formula.

1. Amps = (Horsepower × 746) ÷ Efficiency ÷ Volts.
2. Watts = Horsepower × 746.
3. Watts = Wattsη
4. Amps = Watts ÷ Volts.
5. Amps = HP × 746V × η × PF.

## What is the 1.73 in 3 phase?

In a 3-phase system the voltage between any two phases is 3 times higher than the voltage of an individual phase by a factor of 1.73 (square root of 3 to be exact).

## How do you calculate the full load of a 3 phase motor?

I= P/(1.732*V*Cos pi)

Here three-phase full load current is equal to the power divided by 1.732 times of line to line voltage and power factor.

## How many amps does a 1.5 HP 3 phase motor draw?

AC Motor Full Load Amperes

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HP 200 Volts 380-415 Volts
1/2 2.5 1.3
3/4 3.7 1.8
1 4.8 2.3
1.5 6.9 3.3

## How many amps does a 3 phase motor draw?

These are only intended to be guidelines and in all cases the full load amps of the motor nameplate should be used for final calculations.

Here are the Full Load Amp (FLA) values for typical 230VAC and 480VAC 3 phase motors.

Motor horsepower Full load amps 230VAC Full load amps 460VAC
2 6 3.0
3 9 4.5
5 15 7.5
7.5 22 11

## What is the formula to calculate amps?

The formula for Amps is Watts divided by Volts. To use the chart, cover up the A with your finger and use the remaining chart calculation of W divided by V. Using our sample panel data, 60 watts divided by 12 volts equals 5 amps.

## What is full load amps on a motor?

Full Load Amps, or F.L.A., represents the amount of current the motor is designed to draw at the rated horsepower. In the example nameplate, this means that when the motor is running under a full load at 230 volts, we can expect it to draw 5.4 amps.

## How do you calculate the no load current of an AC motor?

No load current for DC motor = 0.25 x Motor Full load current.

## Is 480V always 3 phase?

480V can be classified as single and 3 phase circuits. 480V 3 phase circuits are the most common power systems used in US industrial plants and are considered to be low voltage power systems.

## How many volts is a 3 phase line?

The voltage betwee two line is called line voltage . 3 phase system is expressed with line voltages. The line votage is 440 volt. Also the voltage between any one phase and neutral for a 3 phase system is 240 volts.

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## How do you measure a 3 phase breaker?

For AC loads, you must also divide by the appropriate phase factor. For 3-phase loads, you divide the VA by the nominal voltage and by the square root of three (approximately 1.732). If your total 3-phase load in a 480V system is 50,000VA, what size breaker do you need? 50,000VA ÷ (480V × 1.732) = 60.2A.

## What is full load voltage?

The full load of a power supply refers to the maximum operation ratings of the power supply. If it is supplying the rated current (same as maximum current) at the rated voltage, then the load that is connected is the full load. There is no set value for a full load because each power supply is rated differently.