This becomes even more important as the charges increase in size. 1 Ampere is defined as the electrical current that flows with electric charge of one Coulomb per second. Re: Convert Voltage/Hertz to Watts? Hastyface. As an example, a device with a nominal power of 525 Watts (watts) and a power factor of 0.7 results in a load of 750 VA. be approximately equal to 0.8: For AC power supply, watts are equal to the power factor times amps That's what die shrinks and many other manufacturing process changes have accomplished. Keep in mind that in Canada and the US the 240V is 2 phase, its two 120V circuits. If the PSU companies had just capped the wattage of their products at like 800W, then not only would video cards consume less power, but they'd also run cooler. Select current type: DCAC – Single phaseAC – Three phase Voltage (in volts): V current (in amps): A […] is equal to 1: For inductive load (like induction motor), the power factor can Answer Save. Since many types of equipment are classified in watts or watts, it is important to consider the PF when sizing them. 1 watt is defined as the energy consumption rate of one joule per second. Input voltage does not affect the amount of power an electric device uses because its current requirements will increase linearly with any decrease in voltage, as ryan_975 pointed out. Just my 2c worth. You must log in or register to reply here. For example 100 watts/10 amps = 10 volts. You did not provide enough information. To know the power in Watts you must multiply 1200VA by 0.9 which will result in: 1080 Watts . In that case power in equals power out. It will be designed for a certain input voltage and current range. 1 decade ago. Rta: // As the formula indicates, you must multiply the VA by the freezer power factor , as follows: 5000VAx0.89 = 4450Watts. the surge range is 120VAC more for the 120VAC standard than it is for the 240VAC standard. Considering there's 35W mobile CPUs that can outperform 140W prescott cpus, I think it's pretty clear that it IS possible to increase performance without increasing power usage. This practice is becoming less common, so it is so important to verify the Watts and VA of a UPS. I brought a Z-5500 5.1 speaker set, an xbox 360 and netgear router, all of them require transformers for 220v. Use the total wattage, plus 20%, as your minimum power requirement. Which one should I look at, also while doing the convertion to 220v from 115v or so on, do the wattage gets divded by 2 as it's half the volts we use in America? JavaScript is disabled. Using the formula: 500VAx0.8 = 400Watts. Source(s): My brain. Knowing the RMS current helps you to correctly size the cables and circuit breakers, protections, breaker or fuses that supply power to your device. To convert from VA to Watts you simply multiply the VA by the Load power factor , as shown by the formula of VA to Watts. 20 v 220V will be less of an issue in the future because in the future things are going to made to use less power, and things already are made to operate at 90VAC, like PSUs; my antec signature 650 operates at 90VAC, People just need to get better circuit breakers, and PS Audio receptacles, they like it because they're the ones that best know how to design power characteristics, 120VAC is better than 220VAC because it could eventually, When the PCI-Express 2.0 slot standard increased the amount of wattage the slots would deliver, that was kind of dumb; that just allowed nvidia and ati to. For AC power supply, watts are equal to the power factor Watts = Voltage/Amps. They won't use any more power at 220 V though the adapter than they would at 120 V without it, aside from a little parasitic loss in the adapter. 2 Answers. Once you get the VA and the power factor of the equipment (s), you only have to replace these values in the following formula: A refrigerator has a power of 1200VA on its nameplate with a power factor of 0.9 . The stored energy is related to the presence of inductance and / or capacitance in an electrical circuit . 1000 VA equals 800Watts, with a power factor of 0.8 and using the formula: 1000VAx0.8 = 800Watts. watts = amps × volts. This website uses cookies to improve your experience, analyze traffic and display ads. I'm going to change ambiguities and make the changes/additions bold; if there is anything that still makes no sense, let me know, because if you told me "you have no idea what you're talking about" then you should elaborate. It is common that it is not easy to find the load power factor , so we offer you the most common values . I wasn't thinking right when I was saying that 240VAC was more vulnerable to surges, because they're rated to run at a higher voltage, after I thought more about it. The power a device draws is defined by it's design. You pay your utility company for watts (W) expressed as energy, which is the energy consumed over a period of time and that generally the utility company shows in kilowatt hours. You have no idea what you're talking about. I'm not sure where to get the information directly from all this products as they don't really specify it clearly. some devices do not need a stop down as they do it themselves. I need some help on understanding the transformations from one to another. Note: The wattage's given below are estimates. I'm taking my time to elaborate and I'm not the one who was talking shit. To correctly size equipment such as UPS, transformers , power plants etc, it is important to understand the relationship between Watts or Watts and VA. To select an inverter from DonRowe.com that has enough power for your application, add the watts for items you may want to run at the same time. Privacy Policy | Relevance. The VA provides information on the amount of current drawn by a computer or circuit , assuming you know the voltage. So I had it backwards. I think you will find that the adapter is just a step down transformer. The power factor is a bit elusive and difficult to find , however you can search on the Internet or in the catalogs with the references of the equipment or similar. An example of energy consumed in watts is the filament in a bulb. Each of these values can be used for various purposes. In the US we use 115v - 125v and in Argentina it's 220v. For example 1.5 amps * 12 volts = 18 watts Enter current in amps. To convert 500 VA to Watts you must have the power factor. 1 decade ago. For DC power supply, watts are equal to amps times volts. 120V is the AC voltage on a single hot wire in … volts times amps = watts The real power in watts (W) is the power that performs the work or generates heat . Therefore, you will want to ensure that the cables and associated circuits that supply power to this equipment conform to an amperage of at least 2.5 A RMS. That's not big difference between 50Hz and 60Hz, but it's critical for some appliances, like oven, CD player etc. Well, if you keep the limits per circuit at 20A (assuming 220V affords much higher than that), then that will require manufacturers of appliances to make their appliances to consume less power. Ampere (amps or amperage) is an SI unit of electric current and is denoted by 'A'. Electric current in amps (A) to electric power in watts (W) calculator. To combine the real power of several DC or AC devices, you can simply add the individual power values in watts of each device to get the total power (the sum of watts is done linearly). Any input VAC > ~120VAC is a surge for the 120VAC standard, because 120VAC is the standard at which it's supposed to operate and anything above maximum accepted input voltage results in a surge. It's actually .55 times if you do the math on a calculator. Commonly the power factor can be obtained by performing a search on the Internet with the references of the equipment , however another way is to use a table with common power factors . I appreciate the information! (1200VAx0.9 = 1080W). In simple terms it will draw what it needs to get the job done. The energy in watts consumed is related to the resistance in an electrical circuit. Differences, definition and what the VA and Watts are used for. newegg's website said that was the minimum input VAC it could run at, as well as the manual; it's listed in reg. I think the oven elements are 240V but I'm not 100% sure. Example 2, how much power a computer has in watts, Example 3, conversion from going to watts for a freezer. times amps times volts. Watt is an SI unit of electric power and is denoted by 'W'. This table shows the commercial values of some UPS with power factors equal to 0.8: Both watts (Watts) and volts-amps (VA) are units of measurement of electrical energy. The heater element is on the other 120V circuit. I = E X R The power will also go up P = I X E. For example if you plugged a 120V device into a 220V outlet it would likely draw twice the current it was designed for, but only for a brief instant just before it goes up in a ball smoke and fire. Power in watts (W) is the speed at which energy is consumed (or generated). Processing "power" isn't directly tied down by conservation of energy. It also shows in a simple way step by step how to perform the conversion . So I moved from the US to Argentina and I took quiet a few things. To improve understanding, some examples are made and a table with the main equivalences of VA to Watts is presented. For many newer types of equipment, such as computer servers, the typical PF is 0.9 or higher . Basically, it would be better overall if Europe followed Japan's lead, so the whole world can just use 120VAC, which would cause things to consume less energy.

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