0
kVA and kW are similar units of power (kiloVoltAmps and kiloWatt), because a watt is volts times amps.
kVAh (or kWh) (kiloVoltAmphours) is the measure of energy: power times unit of time. It is the standard power measurement used by electricity service utility companies.
If a 1kW electric fire is used for 2 hours, it has used 2kWh of energy. A 2kW fire used for 2 hours or a 1kW fire used for 4 hours uses the same amount of energy, 4kWh.
If your device is a pure resistive load then the ac (alternating current) voltage will be used to force the current through the load with a power factor value of 1 (one) and your kVARh will be zero.
If you have a pure inductive load then the voltage will not immediately be able to push the current through the load due to it's very high initial impedance (similar to inertia with a massive object when you push it) but once the current starts to move (its ac cycle rises from zero) the voltage starts to drop off (its ac cycle falls from 100%).
This effect is called the "phase lag" of an inductive load having a power factor of less than 1 and causes some of the kVA being generated at the power station to be wasted - the lower the power factor value, the more the % of kVA that is being wasted. The unused/useless % of kVA must still be generated by the electricity service utility company, even though it is not used, so they have to charge for it as kVARh (kiloVoltAmpsReactivehours).
Taking one step back, the watt is used to measure the true power of a load; a reactive volt ampere is used to measure the reactive power of a load (i.e. the rate at which energy is alternately stored and returned from a magnetic or electric field); and a volt ampere is used to measure the apparent power of a load -where apparent power is the vector sum of the true power and the reactive power.
The product of power and time is energy. So the watt houris a measure of the rate of consumption of energy; the reactive volt ampere hour is a measure of the energy alternately stored in a field and returned to the supply; and the volt ampere hour is the vector sum of these two categories of energy.
Add your answer:
Earn +20 pts
How do we Calculate Kwh to Kvah?
To convert 'kwh' to 'kvah' you first need to measure the length of time. You will then convert this amount to hours by dividing by 3,600. You will then divide this amount by the length of time.
What is difference between KV and KVA for transmission line?
KV, kilovolts, or kilojoules per coulomb is not the same thing as KVA, kilovoltamperes, or kilojoules per second, and no direct comparison exists. Please restate the question.
How does kvar work?
kvar can be calculated as follows the a product KVA andt the sine of the angle between the KVA and KW.
What is a 1035 VA in KVA?
1.035 KVA
What is difference between KVA and MVA?
The volt ampere (V.A) is the unit of measurement of apparent power.Apparent power is the vector sum of a circuit's true power and reactive power.A kV.A (not 'KVA') is the symbol for kilovolt ampere, whereas MV.A (not'MVA') is the symbol for megavolt ampere. So the latter is one-thousand times greater than the former!
How do we Calculate Kwh to Kvah?
To convert 'kwh' to 'kvah' you first need to measure the length of time. You will then convert this amount to hours by dividing by 3,600. You will then divide this amount by the length of time.
Working principle of trivector meter?
trivector meters are used to measure kVAh and also kVA of maximum demand.it has a kwh meter and reactive kvah meter in a case with special summator mounted between them.
What is the difference between a 1.5KVA and a 3KVA transformer?
The 3 kVA transformer will weigh double the 1.5 kVA transformer.
Maximun demand tariff I have a company which works 24 7 with has an average load which is constant at 100kw at 7 lagging power factor i want to know the annual energy cost of running the company?
On a KWh billing systemOn a kVAh billing systemtariff 1 euro 20.50/KW Each kWh@14c7tariff 2 euro 19.20/KVA Each kVAh@13c5
What is difference between KV and KVA for transmission line?
KV, kilovolts, or kilojoules per coulomb is not the same thing as KVA, kilovoltamperes, or kilojoules per second, and no direct comparison exists. Please restate the question.
How many kVA equal kvar?
For normal power factors (pf=80%), you have 0.8 kW for every kva. In general however, kW = pf x kVA. Where pf is the power factor, it is the cosine of the angular difference between the voltage and the current of a circuit in alternating current circuits.
How does kvar work?
kvar can be calculated as follows the a product KVA andt the sine of the angle between the KVA and KW.
How calculate kvar?
kvar can be calculated as follows the a product KVA andt the sine of the angle between the KVA and KW.
How do convert KVA to KW?
kVA = kW divided by (power factor). The power factor is the cosine of the angle between voltage and current.
Difference between two part tariff and three part tariff?
1.two part tariff= maximum demand+energy consumption (150 kva + any greater than 150 kva consumption) 2.three part tariff=maximum demand+energy consumption+ any energy charge (150 kva + any greater than 150 kva consumption + out source any energy charge ) unlimited usage of tariff is nothing but three part tariff
How do you convert kav to kilowatt?
To convert kVA to kilowatts (kW), you need to multiply the kVA by the power factor (PF). The formula is: kW = kVA x PF. Power factor can range from 0 to 1, with typical values around 0.8 for many applications.
What is difference between KVA and MVA?
The volt ampere (V.A) is the unit of measurement of apparent power.Apparent power is the vector sum of a circuit's true power and reactive power.A kV.A (not 'KVA') is the symbol for kilovolt ampere, whereas MV.A (not'MVA') is the symbol for megavolt ampere. So the latter is one-thousand times greater than the former!
