# What are the power equation of 3 phase AC system?

## What are the power equation of 3 phase AC system?

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

## What is the formula of AC motor?

To calculate RPM for an AC induction motor, you multiply the frequency in Hertz (Hz) by 60 — for the number of seconds in a minute — by two for the negative and positive pulses in a cycle. You then divide by the number of poles the motor has: (Hz x 60 x 2) / number of poles = no-load RPM.

## How do you calculate three phase motor?

The equation is W = AV(sqrt 3) where A is amperes, V is volts, and sqrt 3 is the square root of 33 (about 1.73). W is the power consumption in watts. For example, if the electric motor uses 50 amps at 240 volts, the wattage is 50 x 240 x 1.73, or 20,760 watts.

## What is the formula for Synchronousspeed of a 3 phase induction motor?

The synchronous speed of an AC motor is determined by the frequency of the source and the number of poles. The RPM is calculated by multiplying the frequency times 60 and dividing by the number of pairs of poles.

## How is 3 phase Watts calculated?

AC three phase amps to watts calculation formula

1. P(W) = √3 × PF × I(A) × VL-L(V) So watts are equal to square root of 3 times power factor PF times amps times volts:
2. watt = √3 × PF × amp × volt. or.
3. W = √3 × PF × A × V. Example.
4. P = √3 × 0.8 × 3A × 110V = 457W. Watts calculation with line to neutral voltage.

## How is slip in motor calculated?

What is Slip in an Induction Motor?

1. Definition: In Induction Motor, a slip is a speed among the rotary magnetic flux as well as rotor expressed in terms of for every unit synchronous speed. It can be measured in dimensionless & the value of this motor cannot be zero.
2. S = (Ns – Nr) / Ns.
3. Slip = (Ns-Nr/Ns)*100.

## Why starters are used in induction motor?

⇒ The starter is a device which is basically used to limit the starting current by supplying reduced voltage to the motor at the time of starting. From the expression of rotor current it can be seen that the current at start can be controlled by : By reducing the supply voltage at the time starting.

## How does the three phase power equation work?

The most important three-phase power equations relate power (P, in watts) to current (I, in amps), and depend on the voltage (V). There is also a “power factor” (pf) in the equation that takes account for the difference between the real power (which performs useful work) and the apparent power (which is supplied to the circuit).

## What are the formulas for linear and induction motors?

The following equations and formulas related to linear and induction motors can be used to calculate the basic parameters while analyzing and designing a single phase and three phase induction motor. Terms used in Motor Torque Equations and formulas.

## How is the real power in a single phase AC circuit calculated?

With single-phase AC power there is only one single sinusoidal voltage. Line to neutral voltage: For pure resistive load and power factor = 1 the real power in a 400/230 voltage (line to line / line to neutral) 20 amps circuit can be calculated as Sorry to see that you are blocking ads on The Engineering ToolBox!

## How many Poles does a 2 Pole 3 phase motor have?

Therefore a 2=pole, 3-phase motor will have six poles. Figure 1. A 2-pole, 3-phase motor. Figure 2. A 4-pole, 3-phase motor. Figure 3. A 6-pole, 3-phase motor. Images from Basil Networks permanent magnet brushless motors page. This is worth a read as it shows the series motor connections.