To find the power given current, multiply by the voltage and then the power factor to convert to W. Now simply follow the above single phase methodД®asy enough. Three phase power is 36 kW, single phase power = 36/3 = 12 kW The line to neutral (phase) voltage V LN = 400/в€љ3 = 230 V To convert a three phase problem to a single phase problem take the total kW (or kVA) and divide by three.ДЄs an example, consider a balanced three phase load consuming 36 kW at a power factor of 0.86 and line to line voltage of 400 V (V LL) : Similarly a transformer (with three windings, each identical) supplying a given kVA will have each winding supplying a third of the total power. The kW per winding (single phase) has to be the total divided by 3. Take a three phase motor (with three windings, each identical) consuming a given kW. To me the easiest way to solve three phase problems is to convert them to a single phase problem. To better understand this or gain more insight, you can read the Introduction to Three Phase Electric Power post In a three phase system we have the line to line voltage (V LL) and the phase voltage (V LN), related by: Three phase system - The main difference between a three phase system and a single phase system is the voltage. To convert from VA to kVA just divide by 1000.

Note: you can do these equations in either VA, V and A or kVA, kV and kA depending on the magnitude of the parameters you are dealing with. As an example, consider a load consuming 23 kW of power at 230 V and a power factor of 0.86: The current is simply the kVA divided by the voltage.

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

Ies ve load calculation