but only the in-phase parts of the voltage and current deliver real power. Because utilities still have to supply the full voltage and current even if they are out of phase, they use a power calculator that bases their charges for electric power on the KVA power. ...
Divide the power consumption in watts by the line voltage multiplied by the power factor to find the amperage. For three phase circuits the power factor is the square root of 3. If your calculator doesn’t have a square root function, use 1.73 as an approximation of the square root of 3...
Calculate power rating in KVA when you know voltage and output resistance. How many amps is a 3-phase? For example, a three phase circuit using 25,000 watts of power and a line voltage of 250 will have a current flow of 25,000/(250 x 1.73), which is equal to 57.80 amperes. What...
To convert kW to KVA you say kW/Power factor=KVA. The kVA is a measure of the apparent power while the kW gives the actual power running through the... See full answer below.Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our...
At times, it is useful to calculate heat dissipation from power consumption in a home or office setting. Utility companies measure the amount of energy a facility uses, often per month, in kilowatt-hours, or kWh. Remembering that power is energy per unit time, it follows that energy is pow...
if the volts and amps are not precisely in phase you have to calculate the watts by multiplying the volts times the amps at each moment in time and take the average over time, i.e. the integral of V*A dt over a full cycle. The ratio between the VA (i.e. rms volts time rms amp...
Because some devices generate heat differently than the general rule of "their power consumption equals their heat output," you must calculate them separately: Lighting.Like IT equipment, the watt output of lighting roughly equals the heat output. Take this number, and multiply it by 4.25 to det...
Step 2: Calculate Room Volume A room with a flat roof has a volume of: RV = w x l x h Where, RV = Room volume w = Room width l = Room length h = Room height Step 3: Determine Critical Volume The critical volume is the maximum permissible hydrogen concentration to limit the...
You can use either of the following equations to calculate power in watts, provided all quantities are expressed in in MKS (meters, kilograms, seconds) metric units. P = F × v \\ P = \frac{W}{t} If you do your measurements on the CGS (centimeters, grams, seconds) system, force ...
How to convert watts to kilowatts with a formula How to convert kW to kVA with a formula What is the formula to convert watts to amps? Find voltage v in the given DC circuit. 1. Calculate the current I_1, I_2, and I_3. 2. Calculate the total power dissipated in this circuit. ...