Converting Ampere between Single Phase and 3 Phase Converting amperage between single phase (120, 240 and 480 Voltage) and three phase (240 and 480 Voltage) With single-phase AC power there is only one single sinusoidal voltage. Most AC power today is produced and distributed as three-phase power where three sinusoidal voltages are generated out of phase with each other. Sometimes it is necessary to turn between power (VA), voltage (V) and amperage (A). The diagram and table below can be used to convert amperage between single phase and three phase equipment and vice versa. Power (VA) Amperage (A) Volts Single Phase Volts 3 Phase Balanced Load 120 240 480 240 480 100 150 200 250 300 0.83 1.25 1.67 2.08 2.50 0.42 0.63 0.83 1.04 1.25 0.21 0.31 0.42 0.52 0.63 0.24 0.36 0.49 0.61 0.73 0.13 0.18 0.25 0.30 0.37 350 400 450 500 600 2.92 3.33 3.75 4.17 5.00 1.46 1.67 1.88 2.08 2.50 0.73 0.84 0.93 1.04 1.25 0.85 0.97 1.10 1.20 1.45 0.43 0.49 0.55 0.60 0.73 700 750 800 900 1,000 5.83 6.25 6.67 7.50 8.33 2.92 3.13 3.33 3.75 4.17 1.46 1.56 1.67 1.87 2.10 1.70 1.81 1.93 2.17 2.41 0.85 0.91 0.97 1.09 1.21 1,100 1,200 1,250 1,300 1,400 9.17 10.0 10.4 10.8 11.7 4.58 5.00 5.21 5.42 5.83 2.30 2.51 2.61 2.71 2.91 2.65 2.90 3.10 3.13 3.38 1.33 1.45 1.55 1.57 1.69 1,500 1,600 1,700 1,750 1,800 12.5 13.3 14.2 14.6 15.0 6.25 6.67 7.08 7.29 7.50 3.12 3.34 3.54 3.65 3.75 3.62 3.86 4.10

4.22 4.34 1.82 1.93 2.05 2.10 2.17 1,900 2,000 2,200 2,500 2,750 15.8 16.7 18.3 20.8 23.0 7.92 8.33 9.17 10.4 11.5 3.96 4.17 4.59 5.21 5.73 4.58 4.82 5.30 6.10 6.63 2.29 2.41 2.65 3.05 3.32 3,000 3,500 4,000 4,500 5,000 25.0 29.2 33.3 37.5 41.7 12.5 14.6 16.7 18.8 20.8 6.25 7.30 8.33 9.38 10.42 7.23 8.45 9.64 10.84 12.1 3.62 4.23 4.82 5.42 6.1 6,000 7,000 8,000 9,000 10,000 50.0 58.3 66.7 75.0 83.3 25.0 29.2 33.3 37.5 41.7 12.50 14.59 16.67 18.75 20.85 14.50 16.9 19.3 21.7 24.1 7.25 8.5 9.65 10.85 12.1We know that reactive loads such as inductors and capacitors dissipate zero power, yet the fact that they drop voltage and draw current gives the deceptive impression that they actually do dissipate power. This “phantom power” is called reactive power, and it is measured in a unit called Volt-Amps-Reactive (VAR), rather than watts. The mathematical symbol for reactive power is (unfortunately) the capital letter Q. The actual amount of power being used, or dissipated, in a circuit is called true power, and it is measured in watts (symbolized by the capital letter P, as always).

The combination of reactive power and true power is called apparent power, and it is the product of a circuit’s voltage and current, without reference to phase angle. Apparent power is measured in the unit of Volt-Amps (VA) and is symbolized by the capital letter S. As a rule, true power is a function of a circuit’s dissipative elements, usually resistances (R). heat pump vs air conditioner costReactive power is a function of a circuit’s reactance (X). 2 ton ac unit capacityApparent power is a function of a circuit’s total impedance (Z). ac motor control boxSince we’re dealing with scalar quantities for power calculation, any complex starting quantities such as voltage, current, and impedance must be represented by their polar magnitudes, not by real or imaginary rectangular components.

For instance, if I’m calculating true power from current and resistance, I must use the polar magnitude for current, and not merely the “real” or “imaginary” portion of the current. If I’m calculating apparent power from voltage and impedance, both of these formerly complex quantities must be reduced to their polar magnitudes for the scalar arithmetic. There are several power equations relating the three types of power to resistance, reactance, and impedance (all using scalar quantities): Please note that there are two equations each for the calculation of true and reactive power. There are three equations available for the calculation of apparent power, P=IE being useful only for that purpose. Examine the following circuits and see how these three types of power interrelate for: a purely resistive load in Figure below, a purely reactive load in Figure below, and a resistive/reactive load in Figure below. True power, reactive power, and apparent power for a purely resistive load.

True power, reactive power, and apparent power for a purely reactive load. True power, reactive power, and apparent power for a resistive/reactive load. These three types of power—true, reactive, and apparent—relate to one another in trigonometric form. We call this the power triangle: (Figure below). Power triangle relating appearant power to true power and reactive power. Using the laws of trigonometry, we can solve for the length of any side (amount of any type of power), given the lengths of the other two sides, or the length of one side and an angle. View our collection of Power Calculators in our Tools section. 13,803 posts, read 19,510,664 times 7,939 posts, read 9,881,502 times Originally Posted by nybbler 1,256 posts, read 2,453,055 times Standardized at 120 V. Electricity suppliers aim to keep most customers supplied between 114 and 126 V most of the time. Originally Posted by sullyguy 14,196 posts, read 40,490,832 times

I'll make it even more complicated. You can have 120 at the outlet, plug your AC in and have it drop to 110. No need to thank me. From the consumer point of view, if the socket fits, the appliance can wear it. 5,037 posts, read 5,971,651 times If you blow your place up Dawn, you could stay with us. Mr. Garbanzo, "more complicated" makes my head hurt. And I'm thanking you anyway! Originally Posted by CheyDee We'll be there soon, even if I don't blow anything up. 4,576 posts, read 6,642,738 times 45,038 posts, read 45,640,403 times is dedicated to bringing you great camping and RVing tips, trips and information. Sign-up to Recieve the Camping News Newsletter Throw a Christmas Cookie Baking Party Food and Wine | Spring Farmers Market Menu Weekend Road Trip | Red Rock Scenic Byway - Sedona, ArizonaThe Best National Parks in the SouthwestCherohala Skyway - Tennessee & North CarolinaWestern and Central Massachusetts