# How do you calculate three phase circuit?

## How do you calculate three phase circuit?

3-Phase Calculations For 3-phase systems, we use the following equation: kW = (V × I × PF × 1.732) ÷ 1,000.

## How do you calculate amps in a 3 phase circuit?

Divide the power consumption in watts by the line voltage multiplied by the power factor to find the amperage. For three phase circuits the power factor is the square root of 3. If your calculator doesn’t have a square root function, use 1.73 as an approximation of the square root of 3.

How do you calculate per phase?

Divide the load by the voltage x route 3 x power factor. So 60000/ ( 440 x 1.732 x 0.8) = 98 . 41A per phase.

What is the 3 phase multiplier?

The electrical power input in kilowatts for a three phase motor is calculated by multiplying the average voltage of all three phases measured at the motor times the average amperage of all three phases measured at the motor times the average power factor of all three phases measured at the motor times a constant of …

### What is the 3-phase power formula?

Reactive Power Of Single & 3-Phase Current:

Quantity DC AC (3-Phase)
Power (W) P = V x I P = I2 x R P = V2 / R P = √3 x VL x IL x Cos Ф P = 3 x VPh x IPh x Cos Ф P = 3 x I2 x R x Cos Ф P = 3 (V2 / R) x Cos Ф

### What is kVA formula?

Use the formula: P(KVA) = VA/1000 where P(KVA) is power in KVA, V is voltage and A is current in amperes. For example, if V is 120 volts and A is 10 amperes, P(KVA) = VA/1000 = (120)(10)/1000 = 1.2 KVA. Use the formula: P (KVA) = P (watts)/pf where pf is the power factor of the power supply.

How do you measure A 3 phase circuit breaker?

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. The next size up is 70A.

How do you calculate amps from Watts and Volts 3 phase?

AC three phase watts to amps calculation formula

1. I(A) = P(W) / (√3 × PF × VL-L(V) ) So amps are equal to watts divided by square root of 3 times power factor times volts.
2. amps = watts / (√3 × PF × volts) or.
3. A = W / (√3 × PF × V) Example.
4. I = 330W / (√3 × 0.8 × 110V) = 2.165A. Amps calculation with line to neutral voltage.

#### 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). A 220V system with three 220V phases has a 220 * 1.73 = 380V cross-phase voltage.

#### What is 100A 3 phase in kVA?

Note : The conversions of the previous table were made taking into account a voltage of 220V, with a three-phase AC power….Amp. to kVA, table for conversion, equivalence, transformation (Voltage = 220, AC, 3F):

How many Amps are: Equivalence in kVA
70 Amps 26.67 kVA
80 Amps 30.48 kVA
90 Amps 34.29 kVA
100 Amps 38.11 kVA

What are the parameters of a 3 phase circuit?

The available parameters may include: phase currents, phase voltages, total power, phase powers, VAR, reactive power and apparent power. If only total circuit power of a balanced three phase three wire circuit is to be determined, a single current measurement will suffice.

What is the active and reactive power of a 3 phase circuit?

Active power of a three-phase circuit P is the sum of the active power of the phase load and active power of the neutral wire. The reactive power of the three-phase circuit S is the sum of reactive power of the phase load and a neutral wire.

## How to calculate the power consumption of a balanced three phase circuit?

2 sin θ 2 + … I nsin θ n] θ B= sin –1(Y B ÷I B ) (Note: For a balanced three phase circuit, the three line currents are equal. I B = I A = I C Equation 6 Power consumption of a balanced three phase wye or balanced three phase delta load: P= (V L I L

## How is power taken in a single phase circuit?

The power taken by a circuit (single or three phase) is measured in watts W (or kW). The product of the voltage and current is the apparent power and measured in VA (or kVA) . The relationship between kVA and kW is the power factor (pf): Single phase system – this is the easiest to deal with.