what is the different between k.w and k.v.a?please anybody explain me?

Answer 1

In a sinusoidal electric current, kW refers to power and kVA is the product of (rms) voltage and current. They are related in AC currents by

kW = kVA * cosø

where ø is the phase difference between the voltage and the current. cosø is also called the power factor.

Answer 2

Hi
Normally we talk about Kilowatts which is the unit a household is charged for which assumes the volts x amps = watts. However on AC there is another factor which comes into play which is power factor.
To try and keep it simple watts are generally a non inductive load like a electric fire amps x volts= watts where the amps are a factor of ohms( purely resistive load), but if you use an like a motor in say a washing machine, the load on this is inductive( it has a coil which induces magnetism which turns the shaft of the motor) a coil has a a lagging currant which can be a circulating currant which is non useful currant( as a matter of interest a capacitor has a leading currant and these are used to correct a lagging currant) the correction for this is KVAr which is normally refered to as power factor.
Factories are charged by the local electricity board by KVA so they get charge for any non useful circulating currants, so factories normally have power factor correction units installed(capacitors) to correct this which reduces the amount of money they are charged.
I hope this helped
regards
John

Answer 3

I'll just try to explain in a slightly more simple way. kW (kilowatts) is the real power used. A simple electric fire, for example, might have a bar which uses 1 kW, meaning that 1 kW of power is actually being taken from the electricity supply and converted into heat (and light) by the fire. This is generally what is important for household items such as fires, kettles, ovens, etc.

kVA (kiloVoltAmps) is a way of expressing the amount of electrical energy being handled by the circuit, even if it is not being used as real power. This is either the same or higher than the kW, and is important in calculating the capacity of wiring circuits. Electric motors are the main items you'll come across where the kVA is more important, as the electrical energy used is generally much higher than the real power output.

Answer 4

David Duke was a member of a terorrist organization as a young man (the KKK). David Duke was a member of an anti-American revolutionary political party with an ideology that openly condoned genocide (the American Nazi Party). Those are, I think, their biggest differences, politically. I am sure there are other, minor differences as well....

Answer 5

KW= sqrootof3xcospixvoltsxAmps
Kw-power
V-voltage
I-current
cospi- phase diff (normally range from 0.85tp1)
sqroot3- rMS value

Answer 6

The former is input and the latter is output.

Answer 7

a few letters and dots mostly.