KVA AND KW DIFFERENCE IN ELECTRICITY

KVA:

                                      

                                   KVA IS Stand for: kilo watt ampere

FULL ANSWER

kVA is known as the apparent power of an electrical system or of a particular circuit. In direct current circuits the kVA is equal to the kW because the current and the voltages do not get out of phase. However, "real power" and "apparent power" differ in their alternating current circuits so kW is the amount of actual power that does valid work where only a fraction of kVA is available and accessible to do work while the rest is in excess in the current.

The relationship between kVA, kW and the power factor is described mathematically as: kW = kVA x power factor; kVa = kW/power factor; and power factor = kW/kVA. In DC circuits, there is no difference between the kVA and the kW because of the power factor. The power factor leads or lags depending on the way that the load shifts the phase of the current compared to the phase of the voltage. This creates a unity in the DC circuits. In AC circuits, voltage and current may get out of phase leading to a difference in kW and kVA that will be based on the power factor (or how much leading or lagging occurs).

Definition kw:

The kilowatt hour is a unit of energy equivalent to one kilowatt (1 kW) of power sustained for one hour.

${\displaystyle 1\,\mathrm {kW\cdot h} =1\,\mathrm {kW} \cdot 3600\,\mathrm {s} =3600\,\mathrm {kWs} =3600\,\mathrm {kJ} =3.6\,\mathrm {MJ} }$

One watt second is equal to one joule. One kilowatt-hour is 3.6 megajoules, which is the amount of energy converted if work is done at an average rate of one thousand watts for one hour.

concept kw:

                          kw is stand for:kilo watt

kw is the unit of measure of power.

kw is a real power while kva is apparant power in kva no inculode internal resistance of instruments .

The kilowatt hour (symbol kWh) is a derived unit of energy equal to 3.6 megajoules. If the energy is being transmitted or used at a constant rate (power) over a period of time, the total energy in kilowatt hours is the power in kilowatts multiplied by the time in hours. The kilowatt hour is commonly used as a billing unit for energy delivered to consumers by electric utilities.